FM 4-20.147, Change 1

  • Upload
    rufus

  • View
    218

  • Download
    0

Embed Size (px)

Citation preview

  • 8/7/2019 FM 4-20.147, Change 1

    1/95

    FM 4-20.147 (FM 10-547)AIR FORCE TO 13C7-37-31

    AIRDROP OF SUPPLIES AND EQUIPMENT:

    Humanitarian Airdrop

    NOVEMBER 2003

    DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited.

    HEADQUARTERSDEPARTMENT OF THE ARMY

    DEPARTMENT OF THE AIR FORCE

  • 8/7/2019 FM 4-20.147, Change 1

    2/95

  • 8/7/2019 FM 4-20.147, Change 1

    3/95

    C1, FM 4-20.147/TO 13C7-1-13CHANGE No. 1

    HEADQUARTERS

    DEPARTMENT OF THE ARMY

    DEPARTMENT OF THE AIR FORCE

    Washington, DC, 4 January 2005

    AIRDROP OF SUPPLIES AND EQUIPMENT:

    HUMANITARIAN AIRDROP

    This change adds the rigging procedures for low-velocity Low Cost Aerial Delivery System.

    FM 4-20.147/TO 13C7-37-31, 28 November 2003, is changed as follows:

    1. New or changed material is identified by a vertical bar ( ) in the margin opposite the changed

    material.

    2. File the transmittal sheet in front of the publication for reference purpose.

    3. Remove old pages and insert new pages as indicated below:

    Remove old pages Insert new pages

    i through v i through v

    3-3 and 3-4 3-3 and 3-4

    3-11 through 3-17

    DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited.

  • 8/7/2019 FM 4-20.147, Change 1

    4/95

    C1, FM 4-20.147

    TO 13C7-37-31

    4 JANUARY 2005

    By Order of the Secretary of the Army and the Air Force:

    PETER SCHOOMAKER

    General, United States Army

    Chief of Staff

    Official:

    SANDRA R. RILEY

    Administrative Assistant to the

    Secretary of the Army

    0433803

    GREGORY S. MARTIN JOHN P. JUMPERGeneral, USAF General, USAF

    Commander, AFMC Chief of Staff

    DISTRIBUTION:

    Active Army, Army National Guard, and U.S. Army Reserve: To be distributed in

    accordance with the initial distribution number 110929, requirements for FM 4-20.147.

    This publication is available at Army

    Knowledge Online (www.us.army.mil)

  • 8/7/2019 FM 4-20.147, Change 1

    5/95

    C1, *FM 4-20.147

    TO 13C7-37-31

    i

    Field Manual HEADQUARTERS

    NO 4-20.147 DEPARTMENTS OF THE ARMY

    Technical Order AND THE AIR FORCE

    NO 13C7-37-31 Washington, DC, 4 January 2005

    Airdrop of Supplies and Equipment:Humanitarian Airdrop

    Contents

    Page

    Preface..................................................................................................................v

    Chapter 1 General Rigging Information Humanitarian Airdrop Loads

    Section I Description of Humanitarian Loads

    Humanitarian Airdrop Methods ...........................................................................1-1

    Section II Parachute Requirements and Packing Procedures

    Parachute Requirements ....................................................................................1-2

    Packing the Reefed G-12 and 68-inch Diameter Pilot Parachutes ....................1-3

    Distribution Restrictions: Approved for public release; distribution is unlimited.

    * This publication supersedes FM 10-547/TO 13C7-37-31, dated 29 September 1980

  • 8/7/2019 FM 4-20.147, Change 1

    6/95ii

    C1, FM 4-20.147/TO 13C7-37-31

    Page

    Chapter 2 Rigging Extended Tri-Wall Airdrop System (TRIADS)

    Section I General Rigging Information for Extended TRIADS

    TRIADS System Components ................................................................................. 2-1

    TRIADS Skid Board ................................................................................................ 2-1TRIADS Container Limitations ................................................................................. 2-2

    Assembly Line Rigging ............................................................................................ 2-2Inspection of Load ................................................................................................... 2-2

    Parachute Used ....................................................................................................... 2-2AFT Restraint .......................................................................................................... 2-2

    Section II Rigging Extended TRIADS Containers

    System Description ................................................................................................. 2-3

    Preparing Items and Skid Board .............................................................................. 2-3Preparing Honeycomb Base .................................................................................... 2-3Preparing Straps and Static Line ............................................................................. 2-4

    Preparing End Caps ................................................................................................ 2-4

    Installing Skid Board ............................................................................................... 2-5Assembling the Box ................................................................................................ 2-6

    AFT Restraint TRIADS and Honeycomb Kit ............................................................ 2-6Filling the TRIADS Container ................................................................................... 2-6

    Installing Vertical Strap and Static Line ................................................................... 2-8Marking Rigged Load ............................................................................................... 2-9

    Chapter 3 Rigging Low Cost High Velocity Container Delivery System (LCADS)

    Section I General Information for LCADS

    LCADS System Components .................................................................................. 3-1LCADS Skid Board .................................................................................................. 3-1

    LCADS Container Limitations .................................................................................. 3-2Inspection of Load ................................................................................................... 3-2Parachute used ....................................................................................................... 3-2

    Section II Rigging High-Velocity LCADS

    System Description ................................................................................................. 3-3

    Preparing Items and Skid Board .............................................................................. 3-3Preparing and Placing Honeycomb .......................................................................... 3-4

    Positioning Sling Assembly ..................................................................................... 3-5Positioning Load and Securing Sling Assembly ....................................................... 3-6Securing Sling Assembly to Skid Board .................................................................. 3-7

    Installing Parachute ................................................................................................. 3-8Marking Rigged Load ............................................................................................... 3-9

    Equipment Required ................................................................................................ 3-9

  • 8/7/2019 FM 4-20.147, Change 1

    7/95iii

    C1, FM 4-20.147/TO 13C7-37-31

    Page

    Section III Rigging Low Velocity LCADS

    System Description ............................................................................................... 3-11Preparing Items and Skid Board ............................................................................ 3-11

    Preparing and Placing Honeycomb ........................................................................ 3-11

    Positioning Sling Assembly ................................................................................... 3-12Positioning Load and Securing Sling Assembly ..................................................... 3-13

    Securing Sling Assembly to Skid Board ................................................................ 3-15Installing Parachute ............................................................................................... 3-15

    Marking Rigged Load ............................................................................................. 3-16Equipment Required .............................................................................................. 3-16

    Chapter 4 Rigging Double A-22 Cargo Bag for High Velocity Airdrop

    Section I General Information for Double A-22 Cargo Bag

    Double A-22 Cargo Bag Components ...................................................................... 4-1Double A-22 Cargo Bag Skid Board ......................................................................... 4-1

    Double A-22 Cargo Bag Limitations ......................................................................... 4-2Assembly Line Rigging ............................................................................................ 4-2Inspection of Load ................................................................................................... 4-2

    Parachute Used ....................................................................................................... 4-2

    Section II Rigging Double A-22 Cargo Bag

    System Description ................................................................................................. 4-3Preparing Items and Skid Board .............................................................................. 4-3Preparing Skid Board Ties and Placing Honeycomb ................................................ 4-4

    Positioning A-22 Sling Assembly ............................................................................. 4-5Positioning Covers and Honeycomb ........................................................................ 4-7

    Positioning Load and Closing Bag Covers ............................................................... 4-8Securing Tie-Down Straps ....................................................................................... 4-9

    Securing Lateral Straps ......................................................................................... 4-10Securing Skid Board Ties ...................................................................................... 4-11Installing Suspension Slings ................................................................................. 4-12

    Installing Parachute ............................................................................................... 4-13Marking Rigged Load ............................................................................................. 4-14

    Equipment Required .............................................................................................. 4-14

    Section III Alternate Rigging Method for Double A-22 Cargo Bag

    Building and Positioning A-22 Containers .............................................................. 4-16Joining A-22 Containers ........................................................................................ 4-17

    Attaching Suspension Webs .................................................................................. 4-18Tying Off Unused Suspension Webs ...................................................................... 4-19

    Installing Suspension Slings ................................................................................. 4-19

  • 8/7/2019 FM 4-20.147, Change 1

    8/95iv

    C1, FM 4-20.147/TO 13C7-37-31

    Page

    Chapter 5 Rigging Quadruple A-22 Cargo Bag Loads for High Velocity Airdrop

    Section I General Information for Quadruple A-22 Cargo Bag

    Quadruple A-22 Cargo Bag Components ................................................................. 5-1Quadruple A-22 Cargo Bag Skid Board .................................................................... 5-1

    Quadruple A-22 Cargo Bag Limitations .................................................................... 5-2

    Assembly Line Rigging ............................................................................................ 5-2Inspection of Load ................................................................................................... 5-2

    Parachute Used ....................................................................................................... 5-2

    Section II Rigging Oversized Items in Quadruple A-22 Cargo Bags

    System Description ................................................................................................. 5-3Preparing Items and Skid Board .............................................................................. 5-3Preparing Skid Board Ties and Placing Honeycomb ................................................ 5-5

    Positioning A-22 Sling Assemblies .......................................................................... 5-7Positioning A-22 Covers ........................................................................................ 5-10

    Constructing Storage Box and Preparing Oversized Item Load .............................. 5-12Positioning Load and Closing Bag Covers ............................................................. 5-15

    Securing Tie-Down Straps ..................................................................................... 5-16Securing Lateral Straps ......................................................................................... 5-17Securing Skid Board Ties ...................................................................................... 5-18

    Installing Suspension Slings ................................................................................. 5-19Installing Parachute ............................................................................................... 5-20

    Marking Rigged Load ............................................................................................. 5-21Equipment Required .............................................................................................. 5-21

    Section III Rigging Food and Medical Items in Quadruple A-22 Cargo Bags for High VelocityAirdrop

    Preparing and Positioning Food and Medical Loads ............................................... 5-23

    Glossary.................................................................................................... Glossary-1

    References ............................................................................................. References-1

  • 8/7/2019 FM 4-20.147, Change 1

    9/95v

    Preface

    This ma nu al tells and sh ows how to prepar e an d rig the following configur ations of Hu ma nita rian

    loads, Ext ended Tri-Wall Airdr op System (TRIADS), Low Cost High Velocity Conta iner Delivery Sys-

    tem (LCADS), Double A-22 Cargo Bag for H igh Velocity Airdr op an d Qu ad ru ple A-22 Ca rgo Bag for

    High Velocity Airdrop from a C-17 an d C-130 aircraft.

    User Information

    The pr oponen t of th is publicat ion is HQ TRADOC. You are en cour aged to report a ny err ors or

    omissions an d to suggest ways of mak ing this a better m an ual.

    Army personn el, send your commen ts on DA Form 2028 directly to:Director

    Aerial Delivery and F ield Services Depart ment

    USA Quarterm aster Center and School

    1010 Shop Road

    Fort Lee, Virginia 23801-1502

    Air Force personnel, send your rep orts on AFTO Form 22 thr ough your respective comma nd Weap -

    ons an d Ta ctics to:

    Headquarters

    Air Mobility Comm an d (AMC/A39T)

    402 Scott Drive, Unit 3AI

    Scott AFB, Illinois 62225-5302

    Air F orce personnel in Special Operat ions Comman d, send your reports on AFTO Form 22

    HQ AMC/A39T will cons olida te an d forward cha nges t o:

    Director

    Aerial Delivery and F ield Services Depart ment

    USA Quarterm aster Center and School

    1010 Shop Road

    Fort Lee, Virginia 23801-1502

    Also send a n in form at ion copy of AFTO F orm 22 t o:

    WR-ALC/LKCB

    460 Richa rd Ra y Blvd.

    Robins AFB, Georgia 31098-1640

    C1, FM 4-20.147/TO 13C7-37-31

  • 8/7/2019 FM 4-20.147, Change 1

    10/95

    1-1

    FM 4-20.147/TO 13C7-37-31

    SECTION I - DES CRIPTION OF HUMANITARIAN LOADS

    General Rigging Information Humanitarian AirdropLoads

    Chapter 1

    HUMANITARIAN AIRDROP METHODS

    1-1. Hum an itar ian a irdrop utilizes th e Cont ainer Delivery System (CDS), somevar iation of th at system , or TRIADS, a special met hod of free drop. Man y factors

    can influence the delivery met hod used.

    a. EXTENDE D TRI-WALL AERIAL DELIVERY SYSTEM (TRIADS). Th e

    TRIADS system is a corr uga ted t ri-wall box rigged for sta tic line dep loyment off

    th e ram p of an aircra ft using CDS procedur es. Typical loads include loose

    Meals Ready-to-Ea t (MREs) or H um an itar ian Da ily Rat ions (HDRs). Following

    deployment th e caps of th e box separ at e from t he sleeve allowing th e cont ainer s

    cont ent t o scatt er an d freefall to the groun d. TRIADS ha s a 1,375 poun d load

    capacity. Cha pter Two of th is man ua l covers rigging TRIADS for airdr op.

    b. LOW-COST AERIAL DELIVERY SYSTEM (LCADS). LCADS is a

    modified, light weight A-22 system with no scuff pad , cover, or friction ada pter son the la ter al ban ds. It is rigged like a h igh-velocity A-22 load, bu t us es one of

    several special para chutes. LCADS is used for high-volume delivery of

    nonfragile item s where aird rop equipment is not recoverable. LCADS ha s a

    2,200 pound load capa city. Cha pter Th ree of th is man ua l covers riggingLCADS

    for air drop.

    c. DOUB LE A-22 CONTAINER. The double A-22 cont ainer consist s of two

    A-22 sling assem blies. The covers ma y or ma y not be used . Only six of the

    susp ension webs are used. The double A-22 cargo bag ha s a 3,375 pound

    load capacity. Cha pter F our of th is man ua l covers rigging the double A-22

    cargo bag.

    d. QUADRUP LE A-22 CONTAINER. The qu adr uple A-22 cont ainer consists

    of four sta nda rd A-22 sling assem blies which can be laced togeth er t o form one

    large cont ainer , or can be individua lly rigged an d t hen configur ed side-by-side

    for u nitized delivery of four loads. The qu adr uple A-22 car go bag ha s a 4,375

    poun d load capacity. Chapt er Five of this m anu al covers rigging the qu adru ple

    A-22 cont ainer.

  • 8/7/2019 FM 4-20.147, Change 1

    11/95

    FM 4-20.147/TO 13C7-37-31

    1-2

    SECTION II - P ARACHUTE REQUIREMENTS AND PACKING PR OCEDURES

    P ARACHUTE REQUIREMENTS

    1-2. The para chute requirements for h uma nitar ian a irdrop are described below.

    a. EXTENDE D TRI-WALL AERIAL DELIVERY SYSTEM (TRIADS).

    There is no para chute used for TRIADS. The TRIADS uses t he free drop

    method.

    b. LOW-COST AERIAL DE LIVERY SYSTE M (LCADS ). LCADS employs a

    26-foot low cost p ar achu te for h igh-velocity (HV) aird rop. The 26 -foot low cost

    par achut e is ma de from more readily available and more economical mater ials

    th an t he sta nda rd 26-foot ringslot para chute. The 26-foot low cost par achut eperform s identically to the st an dar d 26-foot para chute except the low cost par a-

    chute is designed for one-time use, wherea s th e stan dar d 26-foot para chute is

    designed for r euse. The low cost pa rachut e is pre-packed and r eady to atta ch t o

    th e load. Like the st an dar d 26-foot para chut e, the low cost para chute is deployed

    usin g a brea ka way sta tic line for high altitu de opera tions. The 26-foot low cost

    par achu te can support su spended weights from 501 to 2,200 poun ds.

    c. DOUB LE A-22 CONTAINER. The double A-22 cont ainer employs a reefed

    G-12 para chu te with both skirt a nd vent reefing. The reefing of the G-12

    par achut e provides for high-velocity ballistics similar t o the sta nda rd H V CDS.

    A stand ar d 68-inch pilot pa ra chut e is used to deploy th e reefed G-12 an d a

    brea ka way sta tic line is used to deploy the 68-inch pilot para chut e. The reefed

    G-12 par achut e can supp ort suspen ded weight s from 2,201 to 3,375 pounds.

    The reefed G-12 an d 68-inch pilot par achu tes ar e packed according to Cha pter

    1, Section II, Para graph s 1-3 thr ough 1-5 of th is man ua l.

    d. QUADRU PLE A-22 CONTAINER. The qua dru ple A-22 cont ainer employs

    the sa me reefed G-12 parachut e (skirt a nd vent r eefing) tha t is used with th e

    double A-22 contain er. A sta nda rd 68-inch pilot pa ra chut e is also used t o deploy

    th e reefed G-12 an d a br eaka way sta tic line is used to deploy th e 68- inch pilot

    para chu te. When the reefed G-12 para chu te is used with th e quadruple A-

    22 it can sup port susp ended weights from 3,375 to 4,375 pounds. The reefed

    G-12 an d 68-inch pilot pa ra chutes a re pa cked according to Chapt er 1, Section

    II, Para graph s 1-3 thr ough 1-5 of th is manu al.

  • 8/7/2019 FM 4-20.147, Change 1

    12/95

    1-3

    FM 4-20.147/TO 13C7-37-31

    P ACKING THE REEF ED G-12 AND 68-INCH DIAMETER P ILOTPARACHUTES

    1-3. The pa cking pr ocedur es for t he r eefed G-12 para chute ar e described below.

    a. PR EP ARING PARACHUTE FOR PR OPER LAYOUT. Prepare para-

    chute for proper layout in a ccordan ce with TM 10-1670-281-23&P.

    b. SERVICING THE CANOPY VENT. Service the canopy vent in a ccordan ce with

    TM 10-1670-281-23&P. The wr ap of type II cott on mu slin cloth is not n ecessary

    if dropping for one-time use. If not u sed, th e canopy vent lines sh ould still be

    tied off with t wo tur ns single of 1/4-inch, type I cott on webbing.

    c. REEFING THE CANOPY VENT. Remove th e bridle loop from th e sta tionar y

    post. With a sh ar p rigging knife, cut a sm all slit (app roximat ely 1-1/2-inches

    in length ) in th e gore ma ter ial of every fourt h gore, directly below th e upper

    latera l band, as shown in Figure 1-1.

    Figure 1-1. Gore Holes Cut Below Upper Lateral Band

  • 8/7/2019 FM 4-20.147, Change 1

    13/95

    FM 4-20.147/TO 13C7-37-31

    1-4

    (1) Route a 4 foot long vent r eefing line ma de of 1- inch tu bula r n ylon from th e

    outside of th e gore int o th e first gore hole as sh own in Figure 1-2. Alter na tema ter ial for t he ven t r eefing line is 1-23/32- inch wide, type VIII n ylon

    webbing or one tur n tr iple of 9/16-inch tu bula r nylon.

    Figure 1-2. Vent Reefing Line Routed into First Gore Hole

  • 8/7/2019 FM 4-20.147, Change 1

    14/95

    1-5

    FM 4-20.147/TO 13C7-37-31

    (2) Run t he line to the right, over the upper lat eral band a nd down into the

    next gore h ole as sh own in Figur e 1-3. Follow Figur e 1-1 for cut tin g goreholes every four th gore. Repeat t his procedur e unt il th e vent r eefing line

    ha s run th rough all 16 gore holes.

    Figure 1-3. Vent Reefing Line Routed Around Upper Lateral Band

  • 8/7/2019 FM 4-20.147, Change 1

    15/95

    FM 4-20.147/TO 13C7-37-31

    1-6

    (3) Pu ll the vent r eefing line t ight to close off the vent. Tie the two ru nn ing

    ends of th e vent reefing line togeth er with a sur geons kn ot and lockingknot, and overhand kn ots in the r unn ing ends. Trim each run ning end at a

    point 2-inches from th e sur geons kn ot an d locking kn ot as s hown in F igure

    1-4.

    Figure 1-4. Vent Reefing Line Pulled Tight and Tied Off

  • 8/7/2019 FM 4-20.147, Change 1

    16/95

    1-7

    FM 4-20.147/TO 13C7-37-31

    1-4. Apply tension in accordan ce with TM 10-1670-281-23&P.

    FOLDING THE GORES AND REEF ING THE CANOP Y SKIRT

    1-5. Position the large line separ ator, th row the r ight suspen sion line group over

    th e left group of gores a nd lines, an d position t he lar ge pedestal fan in a ccordan ce

    with TM 10-1670-281-23&P.

    a. Lay out a single 47-foot lengt h of 9/16-inch tu bula r n ylon webbing or a

    doubled 47-foot length of 1/2-inch t ubu lar nylon webbing. Remove twists an d

    apply a sma ll am ount of ten sion (just enough t o rem ove slack). While un der

    tension, measure 2 feet in from both end s and ma rk th e tubular n ylon. Fold

    th e webbing length back onto itself an d line up th e mar ks. While holding th e

    mar ks together, pull the line out stra ight , apply a small amount of tension,

    an d locate and m ar k th e center of th e line. This tubu lar nylon length will bethe skirt reefing line.

    Note: When fabricating the skirt reefing lines in large quantities, recommend

    marks on the floor or on a packing table be made at 2 feet, 23-1/2 feet, 45 feetand 47 feet. Use these marks to assist in marking and cutting reefing lines.

    All measurements should be within + 1 inch.

    b. Rout e one free run ning end of th e skirt r eefing line down th rough th e right

    side of th e suspen sion line 33 pocket ba nd, behind s uspen sion line 33, and ba ck

    up th rough the left side of th e pocket band. Pu ll the line thr ough unt il th e

    center ma rk on th e skirt r eefing line is lined up with su spension line 33 as

    shown in Figure 1-5. Tie a temporar y slip knot in t he reefing line onto suspen -

    sion line 33 to keep th e reefing line from moving off the m ar k.

    Figure 1-5. Skirt Reefing Line Routed and Centered on Suspension Line 33

    APPLYING TENSION

  • 8/7/2019 FM 4-20.147, Change 1

    17/95

    FM 4-20.147/TO 13C7-37-31

    1-8

    c . Begin to fold th e right gore gr oup (lines 33 th rough 64) in a ccordan ce withth e TM procedures. As each susp ension line is passed over, route th e reefing

    line th rough the pocket ban d, behind the suspension line an d back up thr ough

    the pocket ban d of th e suspension line being passed over in th e same m ann er as

    shown in F igure 1-5. Repeat for every suspen sion line, leaving about 8 inches of

    slack in t he r eefing line between each suspen sion line. Tie a temporar y slip

    knot in t he end of the skirt reefing line onto suspension line 64 to keep th e

    reefing line from slippin g out of position.

    d. Thr ow the left group of gores over th e folded right group of gores. Un tie th e

    tem porar y slip knot in th e reefing line on su spens ion line 33. Fold the left gore

    group (lines 32 th rough 1) in a ccordance with th e TM and route th e other end of

    the r eefing line th rough pocket ban ds 32 thr ough 2 and behind suspension lines

    32 through 2 in the same ma nner as l ines 33 through 64.

    e . Unt ie the temporar y slip knot in the r eefing line on suspension line 64. Run

    both ends of th e reefing line down t hr ough pocket ba nd 1 an d behind su spension

    line 1. Line up both ma rks on t he reefing line directly behind suspension line 1.

    Wrap ea ch end of the reefing line aroun d suspen sion line 1 one time a s shown in

    Figure 1-6. Tie the ends of the reefing lines together with a sur geons kn ot and

    locking knot and overha nd kn ot in the run ning ends. Trim each runn ing end

    at a point 2-inches from th e surgeons knot a nd locking knot. The skirt reefing

    is now complete . Complet e gore folding in accorda nce with TM 10-1670-281-

    23&P.

    Figure 1-6. Ends of Skirt Reefing Line Wrapped Around and Tied Off at Suspension Line 1

  • 8/7/2019 FM 4-20.147, Change 1

    18/95

    1-9

    FM 4-20.147/TO 13C7-37-31

    f. Complete Pa cking of the Reefed G-12. Tie the canopy and suspen -sion linesa nd t ie the conn ector link a ssemblies. The brea k cord t ie will be IAW

    the inst ructions in P ara graph f (1). Stow the canopy, suspension lines andrisers, a nd close the deployment bag in accordan ce with TM 10-1670-281-

    23&P.

    (1) Connect th e G-12 deployment bag bridle to the pa ra chute a pex loop

    with a 60-inch str ap a s shown in Figure 1-7. This is necessary to keep the

    68-inch pilot para chut e perma nently at tached to th e apex of the canopy.

    Per ma nen tly att aching th e pilot chu te will sta bilize the canopy inflat ion.

    The following alter na te ma ter ials are a ut horized for use for th e 60-inch

    strap:

    (a) A 60-inch loop, single tu rn of Type VIII nylon webbing

    (b) A 60-inch loop, single tur n of 1-inch t ubu lar n ylon webbing

    (c) A 60-inch loop, single tur n of -inch tu bula r n ylon webbing

    (d) A 60-inch loop, one t ur n double, of 9/16-inch tu bular nylon webbing

    (e) The st an dar d 60-inch connector stra p, with out using L-bar conn ector

    links.

    NOTE: When installing the 60-inch connector strap without using the L-bar connector

    links, use the same materials and number of turns shown above to connect one end ofthe strap to the bag bridle and one end to the apex loop. Use the length required to tiethe strap, leaving no slack between the strap and bridle, or the strap and the apex loop.

    (2) The ties defined in the a bove paragra ph mu st be tied at t he bag bridle

    cent er loop as follows: Run th e mat erial th rough t he ap ex loop, pass th e

    run ning ends thr ough the top of the deployment bag an d then t hrough th e

    bag bridle center loop from opposite dir ections. Tie th e first par t of a

    sur geons kn ot inside th e center loop, th en t ie two double overh an d kn ots on

    the outside of th e center loop with kn ots in th e run ning ends. Tape th e 60-

    inch loop at th e apex loop and th e bag bridle cent er loop using severa l tur ns

    of cloth duct ta pe. When t ying the 60-inch conn ector str ap with out using

    the L-Bar conn ector links, use th e same t ie as described at both t he ap ex

    loop and th e bag br idle cent er loop.

    Figure 1-7. 60-inch Strap Connecting G-12 Deployment Bag to Parachute Apex Loop Completed

  • 8/7/2019 FM 4-20.147, Change 1

    19/95

    FM 4-20.147/TO 13C7-37-31

    1-10

    g. Packing an d Rigging the 68-inch Diameter P i lot Parachute . Packand rig the 68-inch pilot pa ra chu te for brea kawa y in accorda nce with TM 10-1670-281-23&P, except th e st at ic line br eak cord tie will be ma de a s follows:

    Cut a 24-inch lengt h of 1/4-inch wide t ype I cott on webbing (in lieu of th e

    sta nda rd type III nylon). Cent er th e length of cott on webbing th rough th e clevis

    an d insure th e runn ing ends ar e aligned. Pa ss each ru nn ing end of the cott on

    webbing thr ough th e sta tic line at ta ching loop from opposite directions forming

    a 4-inch loop of one tur n double between t he clevis pin an d th e att aching loop as

    shown in F igure 1-8. Secure t he cott on webbing ends on top of th e sta tic line

    att aching loop with a surgeons knot an d a locking knot. Trim each ru nn ing

    end a t a point 2 inches from th e sur geons kn ot an d locking kn ot.

    Figure 1-8. Breakaway Static Line Breakcord Tie for 68-inch Diameter Pilot Parachute Secured

  • 8/7/2019 FM 4-20.147, Change 1

    20/95

    1-11

    FM 4-20.147/TO 13C7-37-31

    1-6. Place th e packed pilot pa ra chut e on top of th e G-12 deployment bag

    bridle assem bly. Use a single loop of ticket nu mber 8/7 cotton th rea d to

    secure the pilot par achut e ont o th e reefed G-12 para chut e in two places.

    The first loop of ticket n umber 8/7 cotton t hrea d will be routed t hrough t he

    pilot par achut e D-bag tie-down loops on one side of th e pilot par achut e D-bag

    an d th rough t he sa me two tie-down loops on one side of th e G-12 bag th at

    ar e norma lly used t o tie th e pilot D-bag. The other loop will be secured in

    the sa me ma nn er on the opposite side as shown in F igure 1-9.

    Figure 1-9. 68-inch Diameter Pilot Parachute Secured to G-12 Deployment Bag

    P OSITIONING P ILOT P ARACHUTE

  • 8/7/2019 FM 4-20.147, Change 1

    21/95

    2-1

    FM 4-20.147/TO 13C7-37-31

    Rigging Extended Tri-Wall Aerial Delivery System(TRIADS)

    Chapter 2

    TRIAD SYSTEM COMPONENTS

    2-1. The TRIAD system , shown in Figur e 2-1, is const ru cted from corr uga ted t ri-wall cardboar d. An 80-inch ta ll sleeve is enclosed by two 12-inch ta ll end caps . A

    vertical stra p with brea k cord secures th e load for t ran sport. The sta tic line, rigged

    to the brea k cord, releases the en d caps after deployment from the a ircraft perm it-

    ting t he cont ent s of th e load t o free-fall to th e ground.

    SECTION I - GENE RAL RIGGING INF ORMATION FOR EXTEN DE DTRIADS

    TRIADS SKID BOARD

    2-2. The sk id boar d is ma de of 1/4- by 48- by 40-inch plywood. If 1/4-inch plywood is

    not a vailable, 3/16 or 5/16-inch plywood may be subst itut ed. The sk id boar d will be

    secured to the conta iner using glue an d 1-inch sta ples.

    Figure 2-1. Fully Rigged TRIAD System with Gate Suspension Loops

  • 8/7/2019 FM 4-20.147, Change 1

    22/95

    FM 4-20.147/TO 13C7-37-31

    2-2

    TRIADS CONTAINER LIMITATIONS

    2-3. The TRIADS conta iner h as a weight restr iction of 747 to 1375 poun ds. Ensu re

    th at th e load weighs a minim um of 28 pounds per squa re foot IAW FM 10-500-3/TO

    13C7-1-11.

    When dropping MREs or HDRs the maximum load is

    dependant on drop altitude. Refer to Table 2-1 for thesystem capacity.

    CAUTION

    ASSE MBLY LINE RIGGING

    2-4. When a ssembly line rigging is used for TRIADS loads , six stat ions a re n eeded.

    The stat ions ar e: prepar ing the caps, preparing honeycomb and skid board, assem -

    bly, filling cont ainer , stra p an d sta tic line insta llation, and final inspection.

    INSP ECTION OF LOAD

    2-5. The TRIADS load must be inspected by a qualified rigger. While being rigged this load

    should be supervised or rigged by a parachute rigger. DD Form 1748-1 must be completed

    before airdrop.

    PARACHUTE U SED

    2-6. No parachute is used for this system.

    AFT RESTRAINT

    2-7. Release ga te su spension loops and additional h oneycomb kits a re r equired for

    TRIADS cont ainer s at pre-determin ed release gat e locat ions in the aircraft. Pr epar eth e honeycomb and str aps a s shown in Figure 2-6.

    NOTE: Installation of the release gate suspension loops and the honeycomb kit must becompleted prior to filling the container with MREs or HDRs.

  • 8/7/2019 FM 4-20.147, Change 1

    23/95

    2-3

    FM 4-20.147/TO 13C7-37-31

    SECTION II - RIGGING EXTENDED TRIADS CONTAINERS

    SYSTEM DESCRIP TION

    2-8. The TRIAD System is a corru gated tr i-wall box rigged for st at ic line deployment

    off th e ram p of an aircra ft. Typical loads in clud e loose MREs or HD Rs. Following

    deployment , th e caps of th e box separ at e from t he sleeve allowing th e cont ainer s

    cont ent s to scat ter a nd free-fall to th e ground.

    P REP ARING ITEMS AND S KID BOARD

    2-9. Refer to Pa ragra ph 2-2 for prepara tion of th e skid boar d. HDRs or MREs mu st

    be rem oved from t heir sh ipping cont ainer s before loading.

    P REP ARING HONEYCOMB BASE

    2-10. Prepar e th e honeycomb base as sh own in Figure 2-2. The h oneycomb layers

    will be glued together h owever, th ey will not be glued t o the base cap.

    1 Cut two pieces of honeycomb 36 by 46 inches a nd two pieces of honeycomb 16 by 36

    inches.

    2 Glue the two 36- by 46-inch pieces of honeycomb together aligning the corners and edges.

    3 Glue the t wo 16- by 36-inch pieces of honeycomb a long the 36 inch long edges of the sheetsleaving a 14 inch space in the center.

    2

    3

    Figure 2-2. Honeycomb Base Prepared

  • 8/7/2019 FM 4-20.147, Change 1

    24/95

    FM 4-20.147/TO 13C7-37-31

    2-4

    P REP ARING STRAPS AND STATIC LINE

    2-11. Prepa re th e stra ps and stat ic line as described below.

    a. Cut one length of type VIII nylon webbing 288 inches long. Measur e 20 inches from

    both ends and place a mark. Fold the type VIII nylon webbing at the 20 inch marks and

    place a double overhand knot, forming a 4 inch loop in the ends. Place an overhand knot

    in the running ends.

    b. Cut one length of type III n ylon cord, 36 inches long an d rem ove th e core

    threads.

    c. Cut one length of 1-inch tubular nylon webbing 228 inches long. Measur e 15 inches

    from one end of the nylon and place a mark. Fold the 1-inch tubular nylon webbing at the

    mark and t ie a double overhand knot to form a 4-inch loop. Tie an overhand knot in the

    ru nn ing end. Inst all a G-14 clevis in the loop. Fr om the opposite end of th e 1-inch tubular n ylon webbing, measur e 24 inches an d mak e a mark .

    d. Cut four pieces of type VIII n ylon webbing (1/2-tubu lar nylon webbing ma y be

    used a s a su bstitut e) 40 inches long.

    e. Cut two pieces of 1-inch t ubu lar n ylon webbin g 36 inches long.

    PREP ARING END CAPS

    2-12. Prepar e the end caps a s shown in Figure 2-3.

    1 Form t he t ri-wall cap by folding all end a nd side flaps in towards the center .

    2 Use an Air St apler (Bostitch D30AD) or equivalent a nd secure t he t ab on each corner to theadjacent side flap assu ring tha t th e corner is square a s shown above. If stapler is not

    available, cloth-backed tape ma y be used. Note tha t t he ta b should be on t he outside of the

    cap. Approxima tely thr ee staples sh ould be used for each corn er. It is not necessary for the

    sta ples to fully penetr at e both layers of th e tri-wall cont ainer .

    3 Repeat process to form th e two caps n ecessar y for the syst em.

    2

    Figure 2-3. End Caps Prepared

    1

  • 8/7/2019 FM 4-20.147, Change 1

    25/95

  • 8/7/2019 FM 4-20.147, Change 1

    26/95

    FM 4-20.147/TO 13C7-37-31

    2-6

    ASSEMBLING THE BOX

    2-14. Assemble the TRIADS conta iner a s shown in F igure 2-5.

    GATE SUS P ENS ION LOOPS AND HONEYCOMB KIT

    2-15. TRIADS cont ainer s located at release gat e locations m ust ha ve release gate

    suspen sion loops insta lled a nd honeycomb reinforcement positioned inside t he box.

    Constr uct an d insta ll the release gate su spension loops an d honeycomb a s shown in

    Figur e 2-6.

    FILLING THE TRIADS CONTAINER

    2-16. Fill the box with t he ap propria te weight of HDRs or MREs . Table 2-1 mus t be

    used determ ine the ma ximum weight for th e drop altitu de. Once filled, install the

    end cap over th e top of th e sleeve.

    1 Cent er th e honeycomb in bas e cap a s shown above.

    2 Slide the 80 inch high sleeve over the honeycomb and inside the base cap.

    3 If the cont ainer is located a t a release gat e location, gate susp ension loops and honeycombreinforcement mu st be positioned inside t he box before it is filled (see Figur e 2-6).

    Figure 2-5. TRIADS Container Assembled

    12

  • 8/7/2019 FM 4-20.147, Change 1

    27/95

    2-7

    FM 4-20.147/TO 13C7-37-31

    1 In order t o insta ll the release gate suspension loops, four 1-inch squa re h oles must be cut inone of th e 48-inch wide sides as sh own above. The h oles should be 6 inches a par t an d located

    between 4 an d 6 inches inboard of the box corner s an d at or near the vert ical cent er of th e box.

    2 Using the 36-inch tu bular n ylon st raps prepar ed in Par agraph 2-11e, loop the nylon t hroughthe h oles as sh own a bove. Tie the ends of th e 1-inch tubu lar with a su rgeons knot a nd

    locking knot with overha nd kn ots in th e run ning ends.

    3 Slide the 1-inch tubular so tha t the knots are inside the box as shown above.

    4 Cut t wo pieces of honeycomb 71-inches by 47-inches and t wo pieces 71- inches by 34-inches.

    Slide the honeycomb aga inst t he inside wall of th e sleeve. The honeycomb should be flush

    with t he t op of the sleeve.

    Figure 2-6. Release Gate Suspension Loops and Honeycomb Kit Installed

    1 34

    edutitlA)LSM(

    forebmuN)sesac(s'RDH

    forebmuN)sesac(s'ERM

    thgieW)bl(

    0001

    00051

    00002

    00052

    00003

    00053

    00004

    )16(016

    )84(084

    )74(074

    )74(074

    )64(064

    )54(054

    )44(044

    )86(618

    )45(846

    )35(636

    )25(426

    )15(216

    )05(006

    )94(885

    3731

    0801

    0601

    0601

    5301

    2101

    099

    Table 2-1. Maximum Fill Capacity for Desired Drop Altitude

    2

  • 8/7/2019 FM 4-20.147, Change 1

    28/95

    FM 4-20.147/TO 13C7-37-31

    2-8

    INS TALLING VERTICAL STRAP AND S TATIC LINE

    2-17. Install the vertical strap and static line as shown in Figure 2-7.

    1 Loop th e 288-inch type VIII stra p prepa red in P ar agra ph 2-11 over th e top of th e box.

    2 Secure th e ends of the stra p using the gutted type III nylon cord described in Para graph 2-11.

    Tie the ends of th e gutt ed type III n ylon cord t ogether using a tru ckers hitch. This forms th e

    break cord t ie.

    3 Slide the free end of the 19-foot long 1-inch tu bular nylon webbing line prepar ed in Para graph

    2-11 through the loop created by the break cord. Align the 24-inch mark with the break cord and t ie a

    surgeons knot and locking knot in the 1-inch tubular nylon webbing. Tie an overhand knot in the

    running end to form the stat ic line. Stow the static line as shown above.

    Figure 2-7. Vertical Strap and Static Line Installed

    3

    1

    2

    Note: Do not cut the excess type III nylon cord; it will be needed to retighten the break cord tie after

    loading onto the aircraft.

  • 8/7/2019 FM 4-20.147, Change 1

    29/95

    2-9

    FM 4-20.147/TO 13C7-37-31

    MARKING R IGGED LOAD

    2-18. Mar k t he r igged load a ccording to F M 10-500-3/TO 13C7-1-11 an d a s sh own in

    Figure 2-8. Comput e the rigged load da ta.

    EQUIPMENT REQUIRED

    2-19. Use th e equipment listed in Table 2-2 to rig th e load sh own in Figure 2-8.

    Weight: Minimu m load allowed ................................................................ 747 pounds

    Maximu m load a llowed ................................................................ 1,375 poun ds

    Height : ...................................................................................................... 80 inches

    Width: ...................................................................................................... 42 inches

    Lengt h: ...................................................................................................... 50 inches

    RIGGED LOAD

    Figure 2-8. Fully Rigged Extended TRIADS

  • 8/7/2019 FM 4-20.147, Change 1

    30/95

    FM 4-20.147/TO 13C7-37-31

    2-10

    Table 2-1. Equipment Required for Rigging Extended TRIADS

    kcotSlanoitaNrebmuN

    metI ytitnauQ

    NSNoN

    NSNoN

    9145-821-00-0355

    NSNoN

    NSNoN

    NSNoN

    NSNoN

    3178-372-00-0408

    8293-357-00-0761

    6412-042-00-0204

    1953-362-00-5038

    5542-862-00-5038

    2575-280-00-5038

    0658-876-00-7061

    4215-470-00-5038

    hcni-08-yb-84yb-04eveelSllaW-irT

    hcni-21-yb-84yb-04paCllaW-irT

    hcni-04-yb-84yb-4/1doowylP

    tnelaviuqero,relpatSnworCworraNL-02SLSocneS

    tnelaviuqero,31LocneS,selpatShcni-1

    tnelaviuqero,relpatSriADA03DhctitsoB

    tnelaviuqero,0609WShctitsoB,selpatShcni-2/11

    etsaPevisehdA

    sehcni-3yb-69yb-63bmocyenoh,gnitapissidygrene,daP( 5,noitacoletagesaeleranidenoitisopsiSDAIRTfI

    deriuqererasteehs )

    IIIepytnolyn,droC

    IIIVepytnolyn,gnibbeW

    hcni-1,nolynralubut,gnibbeW

    ni-2/1,nolynralubut,gnibbeW

    41-G,llams,sivelC

    hcni-2,evisehda,epaT

    1

    2

    1

    1

    deriuqersA

    1

    deriuqersA

    deriuqersA

    steehs1

    dY1

    sdY31

    sdY7

    deriuqersA

    1

    deriuqersA

  • 8/7/2019 FM 4-20.147, Change 1

    31/95

    3-1

    FM 4-20.147/TO 13C7-37-31

    Rigging Low Cost Aerial Delivery System (LCADS)

    Chapter 3

    LCADS SYSTEM COMPONENTS

    3-1. The LCADS shown in F igure 3-1 emp loys a low cost version of th e A-22 slingassem bly and low cost version of th e 26-foot ringslot para chut e th at can be readily

    procured if needed. The low cost sling assem bly uses a m ore readily available and

    more economical ma terial an d eliminat es much of the ha rdwar e as compar ed to the

    sta nda rd A-22 sling assem bly.

    SECTION I- DES CRIPTION OF HUMANITARIAN LOADSSECTION I - GENE RAL INF ORMATION FOR LCADS

    LCADS SKID BOARD

    3-2. Like the st an dar d h igh velocity CDS, the sling assembly is secur ed to a 3/4 or

    1- by 48 by 48- inch plywood (Grad e AC) skid boar d with 1/2-inch t ubu lar nylon

    webbing. Honeycomb is positioned between th e contain er an d th e skid boar d for

    impact cushioning.

    Figure 3-1. Fully Rigged LCADS System for High Velocity Airdrop

  • 8/7/2019 FM 4-20.147, Change 1

    32/95

    FM 4-20.147/TO 13C7-37-31

    3-2

    LCADS CONTAINER LIMITATIONS

    3-3. The LCADS cont ainer ha s a weight rest riction of 501 to 2,200 poun ds. However,

    it is recommen ded th at th e maxmium load be limited to 1,750 to insu re load su rviv-

    ability.

    INSP ECTION OF LOAD

    3-4. The LCADS load m ust be inspected by a qua lified rigger. While being rigged

    th is load sh ould be supervised or r igged by a par achut e rigger. DD Form 1748-1

    mu st be completed before a irdrop.

    PARACHUTE U SED

    3-5. LCADS employs a 26-foot HV low cost pa ra chu te. The 26-foot low cost pa ra -

    chut e perform s identically to the st an dar d 26-foot HV para chute except th e low cost

    par achu te is designed for one-time use, wher eas th e stan dar d 26-foot HV is designed

    for reu se. The low cost pa rachut e maybe pre-packed and r eady to atta ch t o th e load.

    The sta ndar d 26-foot H V parachut e may be u sed if the low cost pa rachut e is not

    available.

  • 8/7/2019 FM 4-20.147, Change 1

    33/95

    3-3

    C1, FM 4-20.147/TO 13C7-37-31

    SECTION II- RIGGING HIGH VELOCITY LCADS

    SYSTEM DESCRIP TION

    3-6. The LCADS System is rigged as a typical A-22 high-velocity load. Typical loads

    include ra tions, water , and other sm all items. LCADS container loads must weigh

    at lea st 501 pounds but not exceed 2,200 poun ds, excluding th e weight of th e para -

    chut e. The load is rigged with a 26-ft low-cost pa ra chut e.

    P REP ARING ITEMS AND S KID BOARD

    3-7. Refer to Figur e 3-2 for prepar at ion of th e skid boar d. Pr epar e the drop itemsaccordin g to th e loads sensitivity. Item s mus t be well padd ed to prevent da ma ge

    during a irdrop.

    1 Pla ce a 3/4- or 1- by 48-by 48-inch p iece of plywood on a flat su rface.

    Note: Loads up to 1,600 poun ds may use 3/4 inch plyw ood, loads that ex ceed m ust

    use 1 inch.

    2 Drill four 1/2-inch h oles on ea ch side as shown a bove.

    3 Measure 3-inches in from ea ch corner of the skid board a nd mak e a cut diagonally.

    4 Cut eight 8-foot legths of 1/2-inch tubu lar nylon webbing. Route one length th rough hole A from

    the bottom and th e oth er end thr ough hole B from the bottom. Even th e ends.

    5 Repeat step 3 for holes C and D and remaining sides.

    Figure 3-2. Preparing the Skid Board

    1

    48 x 48

    3

    3

    A

    BC

    D

    3

    5

    1818

    2

    2

    5

    4

    2

    5

  • 8/7/2019 FM 4-20.147, Change 1

    34/95

    C1, FM 4-20.147/TO 13C7-37-31

    3-4

    1 Cent er a 36- by 44-inch a nd a n 8- by 44-inch piece of honeycomb side by side on t he sk id board.

    Make su re t he layer is 2-inches in from all sides.

    2 Cut th ree 8- by 44-inch pieces of honeycomb. Cent er one piece on t op of the first la yer of

    honeycomb. Pla ce one piece of honeycomb even with each side edge.

    3 Cent er a 36- by 48-inch a nd an 12- by 48-inch piece of honeycomb side by side on t op of the

    second layer of honeycomb.

    4 Cut t hr ee 12- by 48-inch pieces of honeycomb. Cent er one piece on top of th e third layer of

    honeycomb. Pla ce one piece of honeycomb even with each side edge.

    5 Repeat step 3 for the fifth layer of honeycomb.

    Figure 3-3. Preparing and Placing Honeycomb

    P REP ARING AND P LACING HONEYCOMB

    3-8. Prepa re a nd place th e honeycomb a s shown in Figure 3-3.

  • 8/7/2019 FM 4-20.147, Change 1

    35/95

  • 8/7/2019 FM 4-20.147, Change 1

    36/95

    FM 4-20.147/TO 13C7-37-31

    3-6

    1 Fast en t he long and sh ort tie-down st raps over the load u sing the friction a dapters provided.

    2 Tie each corn er of th e sling assembly around the load using th e loops at th e ends of th e latera lstr aps with 1/2-inch tu bular n ylon webbing forming a figur e eight . Secure with su rgeons

    knot an d locking knot with overha nd kn ots in th e run ning end.

    3 Bring the end s of the support web up, remove an y twists, and ta pe them t ogether 4 inchesbelow th e lower D-rings us ing ma sking t ape.

    Figure 3-5. Load Positioned and Sling Assembly Secured

    P OSITIONING LOAD AND SECUR ING SLING ASS EMBLY

    3-10. After center ing th e load on t he sling as sembly an d honeycomb, cover th e loadwith a plastic bag, shrink wrap or if th at is not available, an A-22 cargo cover.

    Secur e an d tie sling assembly as shown in F igure 3-5.

    1

    2

    3

  • 8/7/2019 FM 4-20.147, Change 1

    37/95

    3-7

    FM 4-20.147/TO 13C7-37-31

    1 Star ting at the left side, take t ie-down A an d diagonally tie it around the intersection of thelower lateral str ap an d fourth su pport web. Use thr ee half-hitch knots and overha nd kn ots in

    the run ning end.

    2 Rout e tie-down B around t he fifth support web a nd lower lat eral str ap int ersection diagonally.Pu ll th e excess slack out, and t ie it with a tr uckers hitch knot an d an overha nd kn ot in t he

    ru nn ing end. Cut excess webbing, leaving the end appr oximat ely 6 inches long.

    3 Repeat step 1 for tie-down D, and secure it to the second inter section on the lower lateral

    strap.

    4 Repeat step 2 for tie-down C, and secure it to the first inter section on the lower lateral strap.

    5 Repeat steps 1 through 4 for the other tie-downs (not shown).

    Figure 3-6. Skid Board Secured to Sling Assembly

    SECURING SLING ASSE MBLY TO SKID BOARD

    3-11. Tie th e sling assembly to the skid board a s shown in F igure 3-6.

    B C DA

    1

    4

    32

    5321 4

  • 8/7/2019 FM 4-20.147, Change 1

    38/95

    FM 4-20.147/TO 13C7-37-31

    3-8

    1 Place the 26-foot low cost para chute on the load. When th e front a nd t he rea r ha ve beendesignated, th e para chu te sides should run para llel to front an d rear .

    2 Place both r isers of th e 26-foot low cost parachut e in th e bell of a medium clevis. Pu t th e

    D-rings of th e sling assem bly on t he bolt of th e clevis, secure t he clevis, an d ta pe th e nu t.

    3 Tie a length of type I, 1/4-inch cotton webbing to an upper lat eral stra p. Pa ss the webbing

    thr ough the loop in th e stat ic line, un der th e stat ic line stows, and over t he par achut e bag.

    Pa ss th e webbing ar ound a stra p of th e support web, and back up to th e loop 18-inches from

    th e end of th e stat ic line. Secur e with a t ru ckers hitch.

    4 Secure the static l ine with retainer bands as shown above.

    Figure 3-7. 26-foot Low Cost Parachute Installed

    INSTALLING PARACHUTE

    3-12. Inst all th e 26-foot low cost par achu te a s shown in F igure 3-7.

    3

    2

    1

    3

    4

  • 8/7/2019 FM 4-20.147, Change 1

    39/95

    3-9

    FM 4-20.147/TO 13C7-37-31

    MARKING R IGGED LOAD

    3-13. Mar k t he r igged load a ccording to F M 10-500-3/TO 13C7-1-11 an d a s sh own in

    Figure 3-8. Comput e the rigged load da ta.

    EQUIPMENT REQUIRED

    3-14. Use th e equipment listed in Table 3-1 to rig th e load sh own in Figure 3-8.

    Weight: Minimu m load allowed ................................................................ 501 pounds

    Maximu m load a llowed ................................................................ 2,200 poun ds

    Height : ...................................................................................................... 83 inches

    Width: ...................................................................................................... 48 inches

    Lengt h: ...................................................................................................... 48 inches

    RIGGED LOAD

    Figure 3-8. Fully Rigged LCADS

  • 8/7/2019 FM 4-20.147, Change 1

    40/95

  • 8/7/2019 FM 4-20.147, Change 1

    41/95

    C1, FM 4-20.147/TO 13C7-37-31

    3-11

    SECTION III - RIGGING LOW VELOCITY LCADS

    SYSTEM DESCRIP TION

    3-15. The LCADS is r igged as a typical A-22 low-velocity load. Typical loadsinclude rat ions, repair part s, water , an d/or oth er small items. Items ma y bedropped in th eir original configur at ion or repa ckaged for greater protection. TheLCADS cont ainer loads m ust weigh a t least 501 poun ds but not exceed 2,200pounds excluding the par achute. The load is rigged with a G-12E cargo para chute.

    P REP ARING ITEMS AND S KID BOARD

    3-16. Pr epare th e skid board u sing Figur e 3-2. Pr epare th e items to be droppedaccording to load's sensitivity. Items m ust be well padded to prevent dam ageduring a irdrop.

    P REP ARING AND P LACING HONEYCOMB

    3-17. Prepa re an d place the h oneycomb as shown in Figure 3-9.

    1 Center a 36- by 44-inch and a n 8- by 44-inch piece of honeycomb side by side on t he skid

    boar d. Make su re th e layer is 2 inches from a ll sides.

    2 Repeat st ep 1 for a second layer of honeycomb; alter na ting the pieces of honeycomb.

    1

    2

    Figure 3-9. Honeycomb Placed and Prepared

    NOTE: Glue all honeycomb in-place.

  • 8/7/2019 FM 4-20.147, Change 1

    42/95

    C1, FM 4-20.147/TO 13C7-37-31

    3-12

    P OSITIONING SLING ASSE MBLY

    3-18. Center t he sling assembly over th e honeycomb and skid board as shown in

    Figur e 3-10. The dimen sions of th e webbing is 222 by 222 inches.

    1 Position th e webbing cent ered on top of th e 44- by 44-inch piece of honeycomb. En sur e tha t

    th e thick lip of th e friction a dap ter is facing down (toward t he su rface).

    Figure 3-10. Sling Assembly Positioned

    1

  • 8/7/2019 FM 4-20.147, Change 1

    43/95

    C1, FM 4-20.147/TO 13C7-37-31

    3-13

    P OSITIONING LOAD AND S ECURING SLING ASSEMBLY

    3-19. Center a nd secure th e load on th e sling assembly and h oneycomb. If a cover

    is available, cover t he load with a p lastic bag, shr ink wr ap or an A-22 cargo cover.A cover is not requ ired. Secure an d tie the sling assem bly as sh own in Figures 3-5 an d 3-11.

    1 Secure the load together with 1/2-inch tubular nylon around each layer.

    2 Cut a nd position a 36- by 44- an d 8- by 44-inch piece of honeycomb on top of th e load. Tape

    th e pieces togeth er an d aroun d the outside edges. Position th e honeycomb cent ered on top

    of th e load.

    NOTE: When 55-gallon drums are used, cut and position a 44- by 44- by 1-inch piece ofplywood on top of the four 55-gallon drums.

    3 Cover the load with shrink wra p, plastic, or an A-22 cover. (Not shown or required)

    Figure 3-11. Load Positioned and Sling Secured

    1

    2

  • 8/7/2019 FM 4-20.147, Change 1

    44/95

    C1, FM 4-20.147/TO 13C7-37-31

    3-14

    4 Fa sten the long and short tie-down straps over the load using the friction adapt ers pro-

    vided.

    5 Tie each corner of th e sling assembly with 1/2-inch tubular n ylon webbing; route the

    webbing u p th rough th e bottom webbing loop, cross th e ties, up thr ough th e next loops, an d

    repeat unt il the t op loops are reached. Secure t he ties togeth er on the top corn ers with a

    sur geons k not an d locking knot. Secure t he excess webbing to the loop of th e opposite

    corner.

    NOTE: On a load where the top lateral straps are above the top of the item, secure theloops together as closely as possible with the tie on top.

    6 Bring the ends of the support web up, remove an y twists, and ta pe them together 4-inches

    below th e D-rings u sing 2-inch ma sking ta pe (not sh own).

    4

    4

    5

    5

    5

    Figure 3-11. Load Positioned and Sling Secured (Continued)

  • 8/7/2019 FM 4-20.147, Change 1

    45/95

    C1, FM 4-20.147/TO 13C7-37-31

    3-15

    SECURIN G SLING ASSE MBLY TO SKID BOARD

    3-20. Tie the sling assembly to th e skid boar d as sh own in F igure 3-6.

    INSTALLING P ARACHUTE

    3-21. Insta ll the G-12E cargo para chu te as sh own in F igure 3-12.

    1 Position a G-12E cargo parachute on top of the load an d secure th e parachut e clevis to the

    securing web D-rings.

    2 Tie th e corners of th e parachu te with one tu rn single type I, 1/4-inch cott on webbing to th e

    sling assembly.

    3 Secure th e 68-inch pilot para chut e to the G-12 deployment bag as described in paragra ph

    1-6.

    2

    1

    3

    Figure 3-12. G-12E Cargo Parachute Installed

  • 8/7/2019 FM 4-20.147, Change 1

    46/95

    C1, FM 4-20.147/TO 13C7-37-31

    3-16

    MARKING R IGGED LOAD

    3--22. Mar k t he r igged load a ccording t o FM 10-500-3/TO 13C7-1-11 and a s shownin Figure 3-13. Comput e the rigged load da ta.

    EQUIPMENT REQUIRED

    3-23. Use th e equipment listed in Table 3-2 to rig the load shown in Figure 3-13.

    RIGGED LOAD

    Weight: Minimum load allowed ............................................................................... 501 pounds

    Maximum load allowed (without parachute) .............................................2,200 pounds

    Height: ........................................................................................................................ 80 inches

    Width: ......................................................................................................................... 48 inches

    Length: ....................................................................................................................... 48 inches

    Figure 3-13. Low-Velocity LCADS Rigged

  • 8/7/2019 FM 4-20.147, Change 1

    47/95

    C1, FM 4-20.147/TO 13C7-37-31

    3-17

    Table 3-2. Equipment Required for Rigging Low-Velocity LCADS

    kcotSlanoitaN

    rebmuN metI ytitnauQ

    3178-372-00-0408

    2658-876-00-0304

    6412-042-00-0204

    8293-357-00-0761

    1732-398-00-0761

    7927-612-00-0761

    1894-821-00-0355

    8115-419-00-0355

    3195-243-10-0761

    4561-388-00-0761

    0176-662-00-0157

    5744-201-10-0138

    1142-862-00-5038

    2575-280-00-5038

    etsaPevisehdA

    )sehcni-06yb-25yb-45(enelyhteyloplim4,revoc,gaB

    parwknirhS

    SDACL,ylbmessagnilS

    )muidem(hcni-4/3,noisnepsus,sivelC

    IIIepytnolyn,droC

    -3yb-69yb-63bmocyenoh,gnitapissidygrene,daP

    sehcni

    :etuhcaraP

    E21-G,ograC

    retemaidhcni-86,toliP

    hcni-69yb-84yb-4/3,doowylP

    ro

    hcni-69yb-84yb-1,doowylP ro

    hcni-84yb-84yb-1,draoBdikS

    ro

    hcni-84yb-84yb-4/3,draoBdikS

    hcni-2,gniksam,epaT

    7/8rebmuntekcit,nottoc,daerhT

    :gnibbeW

    Iepyt,hcni-4/1,nottoC

    hcni-2/1,ralubut,nolyN

    deriuqersA

    deriuqersA

    deriuqersA

    1

    1

    deriuqersA

    steehs3

    1

    1

    teehs1

    teehs1

    1

    1

    deriuqersA

    deriuqersA

    deriuqersA

    deriuqersA

  • 8/7/2019 FM 4-20.147, Change 1

    48/95

    4-1

    FM 4-20.147/TO 13C7-37-31

    Rigging Double A-22 Container for High Velocity Airdrop

    Chapter 4

    DOUB LE A-22 CONTAINER COMP ONENTS

    4-1. The double A-22 cont ainer , shown in Figur e 4-1, employs two stan dar d A-22sling assem blies which can be laced together t o form a lar ger cont ain er, or which

    can be ind ividua lly rigged an d configur ed side-by-side as des cribed in Section III of

    th is cha pter. This system employs a reefed G-12 parachut e.

    SECTION I - GENE RAL INF ORMATION FOR DOU BLE A-22 CONTAINER

    DOU BLE A-22 CONTAINER SKID B OARD

    4-2. The sling assem blies are secured t o a 1- by 48- by 96- inch p lywood (Gra de AC)

    skid board with 1/2- inch tu bular nylon webbing. Honeycomb is positioned between

    th e conta iner a nd t he skid board for impa ct cushioning.

    Figure 4-1. Fully Rigged Double A-22 Container System

  • 8/7/2019 FM 4-20.147, Change 1

    49/95

    FM 4-20.147/TO 13C7-37-31

    4-2

    DOU BLE A-22 CON TAINE R LIMITATIONS

    4-3. The double A-22 cont ainer ha s a weight r estr iction of 2,201 to 3,375 poun ds.

    En sur e th e load weighs a minim um of 28 pounds per squa re foot IAW FM 10-500-3/

    TO 13C7-1-11.

    ASSE MBLY LINE RIGGING

    4-4. When assem bly line r igging is u sed for d ouble A-22 conta iner loads, five

    stat ions ar e needed. The stations are: laying out cont ainers an d preparing base,

    positioning load, rigging load, inst alling par achut e, and in specting the r igged load.

    INSP ECTION OF LOAD

    4-5. The double A-22 cont ain er load mu st be ins pected by a qua lified rigger. While

    being rigged, th is load sh ould be sup ervised or rigged by a pa ra chut e rigger. DD

    Form 1748-1 mu st be completed before airdr op.

    PARACHUTE U SED

    4-6. The system employs a reefed G-12 para chu te with both skirt and vent r eefing.Pr ocedur es for pa cking the reefed G-12 para chut e can be found in Ch apt er 1, Section

    II of this ma nu al.

  • 8/7/2019 FM 4-20.147, Change 1

    50/95

    4-3

    FM 4-20.147/TO 13C7-37-31

    SECTION II - RIGGING DOUB LE A-22 CONTAINER

    SYSTEM DESCRIP TION

    4-7. A typ ical load is r igged for high -velocity aird rop using a double A-22 cont ain er.

    The double container is made by using t wo A-22 sling assem blies. Shr ink wra p or

    plast ic sheet ing can be used in lieu of th e sta nda rd A-22 cargo cover. Double A-22

    cargo bag cont ain er loads m ust weigh at least 2,201 poun ds but n ot exceed 3,375

    pound s, excludin g the weight of th e para chut e. The load is rigged with a r eefed

    G-12 parachute.

    P REP ARING ITEMS AND S KID BOARD

    4-8. Prepar e the sk id boar d according to Figure 4-2. Prepa re th e drop items accord-

    ing to the loads sensitivity. Items m ust be well padded to prevent dam age during

    airdrop.

    1 Pla ce a 1- by 48- by 96-inch p iece of plywood on a flat su rface.

    2 Drill twent y-four 1/2-inch h oles on ea ch side as shown a bove.

    Figure 4-2. Skid Board Prepared

  • 8/7/2019 FM 4-20.147, Change 1

    51/95

    FM 4-20.147/TO 13C7-37-31

    4-4

    1 Cut twelve 10-foot lengths of 1/2-inch tu bular nylon webbing. Route one end t hr ough hole A

    an d th e other th rough hole B, from bottom to top.

    2 Repeat step 1 for h oles C an d D.

    3 Repeat steps 1 a nd 2 for t he other five sets of holes.

    4 Determine the size of the honeycomb needed according to the size of the load. Cut an d center

    th e honeycomb on the skid board . Mak e sur e the h oneycomb is moved in 2-inches from all

    sides.

    Figure 4-3. Skid Board Ties Prepared and Honeycomb Placed

    P REP ARING SKID BOARD TIES AND P LACING HONEYCOMB

    4-9. Prepar e the sk id board ties and place th e honeycomb as shown in Figure 4-3.

    Note: All double A-22 container loads will use a minimum of five layers of honeycomb. The twobottom layers will not exceed 44 by 92 inches and the top three layers will be the size of the load.

  • 8/7/2019 FM 4-20.147, Change 1

    52/95

    4-5

    FM 4-20.147/TO 13C7-37-31

    POSITIONING A-22 SLING ASSEMBLIES

    4-10. Position t wo A-22 sling ass emblies on th e double A-22 load a s sh own in F igure4-4.

    Figure 4-4. A-22 Sling Assemblies Positioned

    1 Place one A-22 sling ass embly toward th e front of th e honeycomb layer. Ext end a ll later alstra ps and su pport webbing. Make sure th e support web D-ring at th e rear extends off the

    edge of th e load.

    2 Fold an d place all lateral str aps on top of the r ear su pport web.

    3 Place the second A-22 sling assembly to the rear . Position it in th e same ma nn er as t he frontassem bly. Mak e sur e the D-ring on the front sup port web extends off th e edge of load.

    12

    3

  • 8/7/2019 FM 4-20.147, Change 1

    53/95

    FM 4-20.147/TO 13C7-37-31

    4-6

    4 Use a len gth of type VIII nylon webbing to tie the su pport web D-rings exposed at th e front

    and rear of the load t o the other A-22 sling assem blies as sh own.

    5 Cut six lengt hs of type VIII nylon webbing. Route one length th rough ea ch set of frictionada pters a t th e midsection of th e load as sh own. Do not apply tension at this time.

    Figure 4-4. A-22 Sling Assemblies Positioned (continued)

    4

    5

  • 8/7/2019 FM 4-20.147, Change 1

    54/95

    4-7

    FM 4-20.147/TO 13C7-37-31

    1 Place the first cover to th e front in th e same ma nn er as sling assembly. Fold the rear excesseven with th e layer of honeycomb.

    2 Repeat step 1 for t he second cover bu t position th e cover t o the rea r of th e skid.

    3 Center th e second layer of honeycomb on th e covers and in the same position as th e first

    layer.

    Figure 4-5. Covers and Honeycomb Positioned

    P OSITIONING COVERS AN D HONE YCOMB

    4-11. Use t wo A-22 car go bag covers wh en r igging t his load, if needed. Position th ecovers as sh own in Figur e 4-5. Pla cing an add itional layer of honeycomb on top of

    the covers a s shown is recommen ded but not required.

    3

    12

  • 8/7/2019 FM 4-20.147, Change 1

    55/95

    FM 4-20.147/TO 13C7-37-31

    4-8

    P OSITIONING LOAD AND CLOSIN G BAG COVERS

    4-12. Center the load so that the weight of the load is evenly distributed. Usehoneycomb a nd cellulose waddin g to protect t he item s. Use cord, rope, or st eel

    str apping to keep the load from shifting. Close the ba g as shown in Figure 4-6.

    1 Fold the bag covers over th e front an d rear first, then the sides over th e top. Fold under th eexcess side covers.

    2 Use six lengths of 1/2- inch tu bula r n ylon webbing to lace th e bag closed. Pu ll th e webbingtight an d tie the run ning ends in a surgeons knot and bow knot. Tape the excess and th e

    kn ot. Leave one r un ning en d slightly exposed to allow ra pid derigging.

    Figure 4-6. A-22 Cargo Bag Covers Closed

    1

    2

  • 8/7/2019 FM 4-20.147, Change 1

    56/95

    4-9

    FM 4-20.147/TO 13C7-37-31

    SECUR ING TIE-DOWN STRAPS

    4-13. Secur e th e tie-down st raps as shown in F igure 4-7.

    1 Route the side tie-down stra ps th rough th e opposing friction adap ters . Apply ten sion to thestraps.

    2 If necessary, at tach a 36 or 60 inch type VIII nylon webbing stra p to either t he front or reartie-down str ap. Route t he ru nning end t hrough th e friction a dapter on t he opposite end

    and tie an overhan d knot in th e runn ing end.

    3 Fold the excess on the tie-down stra ps and tape or tie it. (not shown)

    Figure 4-7. Tie-Down Straps Secured

    1

    2

  • 8/7/2019 FM 4-20.147, Change 1

    57/95

    FM 4-20.147/TO 13C7-37-31

    4-10

    SECUR ING LATERAL STRAPS

    4-14. Secure the lat eral str aps a s shown in Figure 4-8.

    1 Lay the remaining portions of the sling assemblies over the load. Route the latera l stra ps

    thr ough t he friction a dapters.

    2 Tighten th e center friction adapt ers and type VIII nylon webbing so tha t the middle

    suspens ion web on each conta iner is vert ical. Insta ll a kn ot in th e run ning ends of

    th e type VIII nylon webbing about 3 inches from th e friction a dapt ers.

    3 Apply equal tension on the remaining lateral straps. Fold the excess and tape or tie in place

    as shown.

    Figure 4-8. Lateral Straps Secured

    32

    1

  • 8/7/2019 FM 4-20.147, Change 1

    58/95

    4-11

    FM 4-20.147/TO 13C7-37-31

    SECUR ING SKID BOARD TIES

    4-15. Secure the sk id board ties as shown in F igure 4-9.

    1 Star ting at the front right side, take tie-down A and diagona lly tie it around th e inter sectionof th e lower latera l strap an d fourth su pport web. Use thr ee half hitch knots and a n

    overhand knot in th e runn ing end.

    2 Route tie-down B around th e fifth su pport web and lower lateral strap intersection diagonally.

    Pu ll th e excess slack out, and t ie it with a tr uckers hitch knot an d an overha nd kn ot in t he

    runn ing end.

    3 Repeat step 1 for tie-down D and secure it to the second inter section on the lower lateral stra p.

    4 Repeat step 2 for tie-down C and secure it to the first inter section on the lower lateral stra p.

    5 Repeat steps 1 thr ough 4 for the other five sets of tie-downs.

    Figure 4-9. Skid Board Ties Secured

    DCA B

    5

    1

    2

    3

    4

    54321

  • 8/7/2019 FM 4-20.147, Change 1

    59/95

    FM 4-20.147/TO 13C7-37-31

    4-12

    INSTALLING SUSPENSION SLINGS

    4-16. Inst all suspen sion slings us ing six susp ension webs, two 3/4-inch car gosuspen sion clevises, a nd two 3-foot (2-loop), type XXVI nylon webbing slings as

    shown in Figure 4-10.

    1 Attach one suspension web to each of th e six D-rings. Route th e snap hook from outside to

    inside. Wrap each hook with mask ing tape.

    2 Place a 3-foot sling on each clevis. Bolt the th ree suspension webs at th e front of the load to

    one clevis. Repeat step for t he rear set.

    3 Route a length of type III nylon cord th rough the six D-rings as shown above. Tie th e ends

    together. Make sur e the t ie has excess to allow suspension sling movement.

    Figure 4-10. Suspension Slings Installed

    11

    1

    2

    3

  • 8/7/2019 FM 4-20.147, Change 1

    60/95

    4-13

    FM 4-20.147/TO 13C7-37-31

    INSTALLING PARACHUTE

    4-17. Inst all a reefed G-12 car go par achut e as sh own in F igur e 4-11.

    Figure 4-11. Reefed G-12 Cargo Parachute Installed

    1 Place a reefed G-12 cargo parachute on the load with the riser compart ment up and the

    bridle toward t he front of the load. Position the pa ra chu te on th e front of th e load.

    2 Tie th e front corn ers of th e para chu te with one turn single type I, 1/4- inch cotton webbing to

    the sling a ssembly.

    3 Tie th e rear corn ers of th e parachu te with two tur ns single type I, 1/4- inch cotton webbing to

    the sling a ssembly.

    4 Bolt the two 3- foot slings to th e parachu tes cargo suspension clevis. Make sur e the risers

    from th e par achute are not removed from th e clevis.

    5 Fold and tape the excess sling with masking tape.

    3

    1 2

    54

  • 8/7/2019 FM 4-20.147, Change 1

    61/95

    FM 4-20.147/TO 13C7-37-31

    4-14

    MARKING R IGGED LOAD

    4-18. Mar k t he r igged load a ccording to F M 10-500-3/TO 13C7-1-11 an d a s sh own in

    Figure 4-12. Comput e the r igged load data .

    EQUIPMENT REQUIRED

    4-19. Use th e equipment listed in Table 4-1 to rig th e load sh own in Figure 4-12.

    Weight: Minimu m load allowed ................................................................. 2,201 pounds

    Maximu m load a llowed ................................................................. 3,375 poun ds

    Height : ...................................................................................................... 83 inches

    Width: ...................................................................................................... 48 inches

    Lengt h: ...................................................................................................... 96 inches

    RIGGED LOAD

    Figure 4-12. Fully Rigged Double A-22 Container

  • 8/7/2019 FM 4-20.147, Change 1

    62/95

    4-15

    FM 4-20.147/TO 13C7-37-31

    Table 4-1. Equipment Required for Rigging Double A-22 Container

    kcotSlanoitaNrebmuN

    metI ytitnauQ

    3178-372-00-0408

    1253-785-00-0761

    2658-876-00-0304

    6412-042-00-0204

    8293-357-00-0761

    NSNoN7927-612-00-0761

    8115-419-00-0355

    1036-260-10-0761

    0176-662-00-0157

    8744-201-10-0138

    1142-862-00-50382575-280-00-50381953-362-00-5038

    etsaPevisehdA

    22-A,ograc,gaB

    )muidem(hcni-4/3,noisnepsus,sivelC

    IIIepytnolyn,droC

    sehcni-3-yb-69-yb-63bmocyenoh,gnitapissidygrene,daP

    :etuhcaraPdefeeR21-G,ograC

    maidni-86,toliP

    hcni-69-yb-84-yb-1,doowylP

    gnibbewnolynIVXXepyt,)pool2(tf-3,pordria,ograc,gnilS

    hcni-2,gniksam,epaT

    7/8rebmuntekcit,nottoc,daerhT

    :gnibbeWIepyt,hcni-4/1,nottoChcni-2/1,ralubut,nolyN

    IIIVepyT

    deriuqersA

    2

    2

    deriuqersA

    steehs6

    11

    teehs1

    2

    deriuqersA

    deriuqersA

    deriuqersAderiuqersAderiuqersA

  • 8/7/2019 FM 4-20.147, Change 1

    63/95

    FM 4-20.147/TO 13C7-37-31

    4-16

    SECTION III - ALTERNATE RIGGING METHOD F OR DOU BLE A-22CONTAINER

    BU ILDING AND P OSITIONING A-22 CONTAINE RS

    4-20. Build t wo individua l A-22 cont ainer s in accordan ce with FM 10-500-3/TO

    13C7-1-11/FMF M 7-47 of the sam e dimen sions. P osition th e two A-22 cont ainer s on

    top of the double skid board and honeycomb kit prepar ed in Figure 4-3. Ensur e tha t

    th e two individua l loads a re flush against each other as shown in Figure 4-13.

    Figure 4-13. A-22 Containers Positioned

  • 8/7/2019 FM 4-20.147, Change 1

    64/95

    4-17

    FM 4-20.147/TO 13C7-37-31

    J OINING A-22 CONTAINERS

    4-21. J oin t he t wo assemblies at t he m id-section on each side of th e load a s shown inFigur e 4-14.

    1 Route a length of type VIII nlyon webbing in an h our-glass patt ern ar oun d the intersection ofthe outer support webs and the lower a nd m iddle lateral str aps of each A-22 container. Tie

    off and t ighten with a t ru ckers hitch.

    2 Route another length of type VIII nlyon webbing in an hour-glass patt ern around th e

    intersection of the outer support webs an d th e middle and u pper later al str aps of each A-22

    container . Tie off and tighten with a tru ckers hitch.

    Figure 4-14. A-22 Containers Joined

    1

    2

  • 8/7/2019 FM 4-20.147, Change 1

    65/95

    FM 4-20.147/TO 13C7-37-31

    4-18

    ATTACHING SUS P ENS ION WEBS

    4-22. Attach suspen sion webs to the two containers a s shown in Figure 4-15.

    1 Attach one suspension web to each of th e six D-rings. Do not connect a suspen sion web to th e

    two cent er A-22 support webs.

    1 1

    Figure 4-15. Suspension Webs Attached

  • 8/7/2019 FM 4-20.147, Change 1

    66/95

    4-19

    FM 4-20.147/TO 13C7-37-31

    TYING OFF U NUSED SUS PEN SION WEBS

    4-23. Fold each un used s usp ension web on top of th e ha lf of th e load t o which

    it was originally rigged as sh own in F igure 4-16.

    Figure 4-16. Off Unused Suspension Webs Tied Off

    1 Route a length of type VIII nylon webbing through the D-ring and down and ar oun d the

    inter section of th e opposite top (or middle) later al str ap a nd t he center s upport web.

    2 Tie off and tighten with a truckers hitch.

    3 Repeat steps 1 and 2 for the opposite side.

    1

    2

    INSTALLING SUSPENSION SLINGS

    4-24. Insta ll the suspen sion slings an d complete th e rest of the rigging in

    accordance with procedur es for a reefed G-12 par achut e on a double A-22

    container.

  • 8/7/2019 FM 4-20.147, Change 1

    67/95

    5-1

    FM 4-20.147/TO 13C7-37-31

    Rigging Quadruple A-22 Container Loads For HighVelocity Airdrop

    Chapter 5

    QUADRUP LE A-22 CONTAINER COMP ONENTS

    5-1. The qu adr uple A-22 conta iner, sh own in Figur e 5-1, employs four st an dar d A-22sling assemblies which can be laced togeth er to form a lar ger conta iner. The

    system em ploys a reefed G-12 para chute.

    SECTION I - GENERAL INFORMATION FOR QUADRUP LE A-22CONTAINER

    QUADRUP LE A-22 CONTAINER SKID BOARD

    5-2. The sling a ssemblies a re s ecured to a 1-1/2 or 2- by 96- by 96- inch plywood

    (Grade AC) skid board wit h 1/2- inch tu bular nylon webbing. Honeycomb is posi-

    tioned between t he conta iner an d th e skid board for impact cushioning.

    Figure 5-1. Fully Rigged Quadruple A-22 Container System

  • 8/7/2019 FM 4-20.147, Change 1

    68/95

  • 8/7/2019 FM 4-20.147, Change 1

    69/95

    5-3

    FM 4-20.147/TO 13C7-37-31

    SECTION II - RIGGING OVERS IZED ITEMS IN QUADR UP LE A-22CONTAINER

    SYSTEM DESCRIP TION

    5-7. A typical load is rigged for high-velocity a irdrop u sing four A-22 sling a ssem-

    blies. Quadr uple A-22 conta iner loads m ust weigh a t least 3,500 pounds but not

    exceed 4,375 pounds , excludin g the weight of th e par achu te. The load is rigged with

    a r eefed G-12 para chute. Typical oversized items include winterizat ion kit s which

    include stoves, ten ts, long rolls of plastic, sleeping bags, blan ket s, etc.

    P REP ARING ITEMS AND S KID BOARD

    5-8. The sk id boar d will cons ist of four 1 - by 48- by 96-inch sh eet s of plywood. At

    least two of the sh eets mu st be AC grade plywood. The other t wo sheets can be

    Grad e D or better . Prepa re the skid boar d according to Figure 5-2. Pr epare th e

    drop items a ccording to the loads sensitivity. Item s mu st be well pad ded to prevent

    dama ge during airdrop.

    1 Lay two sheet s of plywood (the grade D or bett er sheet s) on the floor, side-by-side, so th at t hey

    form a 96- by 96-inch squ ar e.

    2 Lay two sheet s of AC plywood perpen dicularly on top of th e first two sheets. Line up all four

    edges to form a squ ar e. The good side of th ese plywood sheets mu st be face up.

    Figure 5-2. Skid Board Prepared

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

    1

    2

  • 8/7/2019 FM 4-20.147, Change 1

    70/95

    FM 4-20.147/TO 13C7-37-31

    5-4

    Figure 5-2. Skid Board Prepared (continued)

    3 Nail the plywood (into the good side of th e AC sheets tha t ar e facing up) along the edges

    appr oximat ely 1 foot a par t u sing 12d nails. The na ils should be 3 to 5 inches from th e

    edges. En sur e each nail head is sun k below the su rface of th e plywood.

    4 Nail along the seam on both sh eets of plywood at 1-foot intervals using 12d nails.

    Ensu re th at each nail head is su nk below th e surface of the plywood.

    5 Flip th e skid board upside-down. Ben d over all exposed na ils (not shown).

    6 Drill thirt y-two 1/2-inch diameter holes as shown above.

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    3-5

    3-5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

    1 2