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UNCLASSIFIED
AD NUMBER
LIMITATION CHANGESTO:
FROM:
AUTHORITY
THIS PAGE IS UNCLASSIFIED
AD033159
Approved for public release; distribution isunlimited.
Distribution authorized to DoD only; ForeignGovernment Information; APR 1954. Otherrequests shall be referred to ControllingOrganization: British Embassy, 3100Massachusetts Avenue, NW, Washinton, DC 20008.
DSTL ltr dtd 15 Feb 2007.
UNCLASSIFIED
AD NUMBER
CLASSIFICATION CHANGESTO:FROM:
LIMITATION CHANGESTO:
FROM:
AUTHORITY
THIS PAGE IS UNCLASSIFIED
AD033159
unclassified
restricted
Distribution authorized to DoD only; ForeignGovernment Information; APR 1954. Otherrequests shall be referred to ControllingOrganization: British Embassy, 3100Massachusetts Avenue, NW, Washinton, DC 20008.
Distribution authorized to DoD only. Otherrequests shall be referred to .
DSTL ltr dtd 15 Feb 2007; DSTL ltr dtd 15 Feb2007
i ikm .
REVIEWED ON:
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14th Birt of Report No. AAE3/861/2.
1253^9^
SWPAIHE
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MINISTRY OF SUPPLY i
AEROPLANE AND ARMAMENT
EXPERIMENTAL ESTABLISHMENT
O CJ N. CJ
O o> O O CM
BOSCOMBE DOWN
EXCLUDED FROM GENERAL DECLASSIEgATKW SCHEDCm EXECUTIVE ORDER
it 5* i Or>uil-
S3|-o FUNCTIONAL TRIALS OF 8 INCH LOVE TEK.'IINAL VELCB
CANBERRA IT
MK.3 VX.1S1 AVON 1
EHOTOGRAFHIC FLASH -«
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ARMY ATTACHE, LONDON.
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THIS DOCUMENT IS THE PROPERTY OF H.M. GOVERNMENT.
It is intended for the use of cne recipient only, and for communication to such officers under him as may require
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so S3
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£? AAEE FORM I. 5/52 (A1513) Wt.338t2/79». 40M. 2. 2/53. H. E. CV S. Gp.848
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-A-London
14818
'otechnic Tests (U)
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HAUM TIOM i
tted are the following Aeroplane and Armament %per:
I£th_<Part2 "Functional Trials of $ inch low terminal velocity photo oorts trials of subject equipment in a Canberra P.R.Kk 3 a&rjcrafl
-?th. .Part'j. '"•'arriage and Release of Flashes, Photogra hie, Air craft, ^»5 fuze ! reports trials of subject eouipment in a Canberra R«R„Mk 3 airera COL. ftes of the inclosiires are marked for transmittal to OEDTA to whom they will be Interest, Dist b, ;: None 2 IncI. 5 copies of each
1- )l/2(l4th Part) 2-A 6l/2(l5th Part)
FOR TH JHE: ( uu. /
Downgraded to UN< ::ien
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Lt. Colon&L, Acting Executive Officer
it this dosnmcct in wboie at m •:ECEBT or TOP SECRET, atcciit ' issuing office. A!! requests (or will fco directed tt> lie Assfow:!
, Department of the Arm^",•,• _-»
OLAEPlflCATlOK
-*«-••" • '••
NOTE: Thk- document coutams lofomed national defcrsc of tlit United SiM*) with of the Espicoage Act, 3T U.S.C". 31 and 3 la Jrnnsnjissism or toe icveiattco of its < mantlet is pre]
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HCATINNY ARSENAL LIBRARY DOVER, N. j.
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CONFIDENTIAL
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14th Part of Report No. AAEE/861/2.
v./ 1 ... ... IJJT AEROPLANE AMD ARHAl'ffiNT EX3SRIMENTAL ESTABLISHMENT
BOSCOHBE DOWN
Canberra ?.R. ivlk.3 VX.181 (2 x Avon 1)
Functional Trials of 8: inch Low Terminal Velocity Photographic Flash
A.& A.E.E. Ref.: AAEE/5935/2/7. M. 0!. S. Ref: 7/Armts/784. Period of Trial: February - October, 1953.
Progress of issue of Report Report No. Title
9th Part of AAES/861/2 VX.181 Night Photographic Trials. 10th - do - WE. 137 Cockpit Appraisal. 11th - do - WE.137 Brief Handling Tests on a Production
Aircraft with Special Reference to Lateral and Direction Behaviour.
12th - do - VX.181 Acceptance Trials of Armament Installa- tion and 1&g- inch Photo Flash.
13th - do - WE.135 Jettisoning of Wing-Tip Tanks in Flight.
Summary
1. Functional trials of the 8 inch L.T.V. photoflash including carriage and release from a Canberra P.R.3 aircraft have been completed.
2. It is recommended that the 8 inch photoflash be accepted for Service use from a functional aspect.
3. It is further recommended that, subject to the essential modifications in para. 7.3 being incorporated, the Canberra P.R.3 be cleared for the carriage and release of three 8 inch photoflashes within the limitations letailed in M.O.S. Trials Pro-forma 1/53 R.D.Afan.2, viz:-
3.1 Carriage
3.1.1 Bomb Bay Doors Closed. To maximum permissible speed and height of the aircraft through normal manoeuvres to the maximum G limitations of the aircraft.
3.1.2 Bomb Bay Doors Open. Up to and including 350 knots I.A.S, or 0.75 I.I.I.N., whichever is the lesser value, to 20,000 feet in straight and level flight and in angles of climb and dive of 10°, through normal manoeuvres to the maximum G- limitations of the aircraft.
3.2 Release. Up to and including 350 knots I.A.S. or 0.75 I.M.N. , which- ever is the lesser value, in straight and level flight from 6,000 feet to 20,000 feet inclusive.
This Report is issued with the authority of
i V.
/ - Air Commodore Commanding A.& A.E.E,
- 2 -
List of Contents gage
1. Introduction 3
2. Object of Trial 3
3. Description of Installation 3
if. Method of Trial 3
5. Results of Trial 3
6. Conclusions 5
7. Recommendations 5
List of Appendices Appendix
Adaption of No. 1 Mark 1 Multi-store Carrier to permit A carriage of three 8 inch Photoflashes.
Plight Carriage Table B
Plight Release Table C
List of Illustrations Figure
i
Three 8 inch photoflashes on No. 1 Mark 1 iviulti-Store Carrier 1
Fuzing arrangements for 8 inch photoflashes 2
Bracket for fitting fuzing units to front of Multi-Store 3 Carrier
Wiring diagram for modified No. 1 Mark 1 Multi-Store it- Carrier
/1. Introduction.
- 3 -
1. Introduction
1.1 Acceptance trials of the 8 inch lav teminal velocity photoflash, including carriage and release from a Canberra P.R.3 aircraft, have been completed as requested by Ministry of Supply Trials Pro-for.ia 1/53 R.D.Arm.2 dated 7th February, 1953.
2. Object of Trial
2.1 The object of the trial -,ms to determine that the 8 inch photoflash was:-
2.1.1 Acceptable for service use.
2.1.2 Suitable for carriage and release from a Canberra P.R.3 aircraft.
3. Description of Installation
3.1 Aircraft Bombing Installation. The bombing installation of the Canberra P.R.3 aircraft is described in para. 3 of the 12th part of this report.
3.2 Multi-Store Carrier. The No.1 Mark 1 Multi-Store Carrier is a Naval store; it is described in A.P. 1664 A, Vol. 1, Sect. 1, Chapter 19. A photograph of the carrier adapted for three 8 inch photoflashes is sham at Figure 1.
4. Method of Trial
4.1 Ground Tests. The ground tests consisted of:-
4.1.1 Checking the aircraft bombing installation,
4.1.2 Adapting the No. 1 Mark 1 Carrier for three 8 inch photoflashes.
4.1.3 Fitting the carrier on the aircraft.
4.1.4 Examining and preparing the photoflashes.
4.1.5 Loading three photoflashes on the aircraft.
4.1.6 Measuring clearance angles.
4.1.7 Taking photographs.
4.2 Air Tests
4.2.1 Carriage. Sorties were flown up to and including the maximum permissible height and speed of the aircraft to ensure that the stores and installation remained rigid and safe. The installation was examined after each flight.
4.2.2 Release. Inert and live photoflashes were released at heights from 6,000 feet to 20,000 feet and at speeds from 250 to 350 knots I.A.S. to ensure that the stores would release cleanly from the aircraft and would function. All releases were photographed by cameras fitted at the aircraft wing tips and in the flare bay. Ground and air observers noted, where possible, how the stores functioned. The luminosity of the photoflashes was not tested as vibration trials with the camera, mountings were still in progress. Releases were restricted to 350 knots I.A.S. as this covered the operational requirements with the present photographic equipment. 5. Results of Trial
5.1 Ground Tests
5.1.1 Aircraft Ba.ibing Installation. Examination of the Canberra P.R.3 bombing installation sho..'ed that a number of modifications were necessary
/for
- 4 -
for the satisfactory carriage and release of 8 inch photoflashes. These modifications which are the same as those recommended during a previous trial on the Canberra P.R.3 with 16^ inch photoflashes, are enumerated in para. 7.1.1 of the 12th Bart of this Report. They are:-
(i) A new type of manual de-bombing system for the No.3 Release Unit i.e. "bowden cn/ble.
(ii) Anchoring the 9/16" nuts of the flare beam front suspension bolts to the inside of the beam brackets.
(iii) Repositioning the seven polo socket on the flare beam in a horizontal position.
(iv) Pitting "FLASHES GONE" indicators in all three crew positions.
(v) Making the pilots emergency jettison switch selective i.e. "SAFE" or "LIVE".
5-1.2 Adapting the Multi-Store Carrier for three 8 inch Photoflashes. By altering the position of the components the No.1 Hark 1 liulti-store carrier can be adapted for various stores. To make it suitable for the carriage and release of three 8 inch photoflashes the components had to be repositioned and the electric wiring modified as detailed at Appendix A.
5.1.3 Fitting the modified Carrier to the Aircraft
(i) The multi-store carrier was suspended from the No.3 Release Unit on the flare beam. The carrier could not be crutched satisfactorily using the flare beam crutching pads which were too long and, on the port side, did not fit the carrier cratching brackets. Two reaction screws (11A/3375) of the 100/1000 lb. Carrier Unit were used on the starboard side and two multi- store carrier reaction screws on the port side. These were satisfactory, the carrier being crutched rigid and parallel to the flare bean.
(ii) The seven pin and five pin plugs v/ere fitted into the appropriate i sockets on the flare beam and the auto-selector switch set to "1". Functioning tests of the release, jettison and fuzing circuits were made; these were satis- factory, the order of release being centre, port and starboard.
5.1.A Examination of the 8 inch Photoflash. The body of the flash is cylindrical with a blunt nose, the nose fuze pocket being closed with a No. 28 plug. A No. 29 suspension lug fits into the body of the flash for suspension on a No. 1 Release Unit. The tail unit is conical with fixed cylindrical fins, it is secured to the flash body with four Allen screws. The flash is nose fuzed with a 1.1111-A.2 Fuze. The measurements of the photoflash fitted with a M111-A.2 fuze are:-
Length 59i inches approx. Diameter 8 inches approx. Y/eight 145 pounds approx.
5.1.5 Fuzing the 8 inch Photoflash. Fuzing the 8 inch photoflash is similar to fuzing a 4.5 inch photoflash fitted with a M111-A.2 fuze. Details of fuzing the 4.5 inches photoflash are contained in A.P. 1661 E, Col. 1 (2nd Edition) Section 11, Appendix 3, paras 1+ to 12,
5.1.6 Loading the Aircraft. Three 8 inch photoflashes were loaded nose forward on the multi-store carrier which had been fitted to the flare beam, these were crutched rigid and parallel to the pylons. No difficulty was experienced during loading. For most of the loading an ALVTS low loader trolley -was used to lift the three stores to within a few inches of the release slips, the photoflashes were then fitted manually.
5.1.7 Clearance Angles Clearance angles of the three stores fitted with M111-A.2 fuzes are:
/(i)
- 5 -
(i) Roll Starboard 17° Port 15°
(ii) Dive 42°
(iii) Climb 63°
5.1.8 Photographs. Photographs of the photoflashes fitted to the multi-store carrier are at Figures 1 and 2.
5.2 Air Tests
5.2.1 Carriage. The handling of the aircraft loaded -with three 8 inch phot of las lies, with flare bay doors open and closed, was satisfactory. Details of the sorties flown are at Appendix "B".
5.2.2 Release
(i) A total of 21 sorties was flown during which 42 inert and 20 live stores were released. Details of the sorties are at Appendix 'C. /ill stores released cleanly from the aircraft and 18 live stores functioned in the air. Although the other two live stores were released "SAFE", these functioned on impact. Sortie No. 21 was completed at the request of R.A.E.
(ii) A number of inadvertent multiple releases occurred during the earlier part of the trial at speeds over 300 knots I.A.S. In each case the auto-selector switch had rotated as though the release button had been operated more than once. This indicated that the circuit was making and breaking during the time the release button was pressed. The circuit and all components were checked for faults which would cause intermittent contact but no faults were found. Replacing the auto-selector switch, the release button, and the flare bay door micro-switches did not prevunt further inadvertent releases. By gradually increasing the speed of the aircraft from 250 knots I.A.S., with the flare bay doors open and the release button pressed, it was established that the inadvertent releases occurred at speeds over 300 knots I.A.S., the probable cause being vibration. The flare bay door micro switches were suspected as b^ing the most Susceptible to vibration, so this test was repeated with them shorted out; no inadvertent releases occurred. The micro switches were reconnected and a slugged relay (Stores Ref. 5D/1412) fitted into the circuit to damp the intermittent contacts, thereafter no further inadvertent releases occurred.
(iii) Because of lev cloud it was not possible to measure accurately from the ground the heights at which the live photoflashes functioned. The heights, which were estimated by observers in the aircraft, were consistent with the settings which had been set on. the ill 11 -A.2 fuzes.
6. Conclusions
6.1 It is concluded that:-
6.1.1 The 8 inch photoflash is acceptable for Service use from a functional aspect.
6.1.2 Further trials may be necessary to test the efficiency of the photoflash as a photographic illuminant.
6.1.3 Subject to the modifications enumerated in para, 7.3 being incorporated, the Canberra P.R.3 aircraft is suitable for the carriage and release of three 8 inch photoflashes within the limitations given in papas. 7.2.1 and 7.2.2.
7. Recommendati ons
7.1 Acceptance. It is recommended that the 8 inch low terminal velocity photoflash be accepted for service use from a functional aspect. Photographic
/trials
- 6 -
trials may be necessary to test the efficiency of the photoflash as a photographic illuminant.
7.2 Carriage and Release Clearance. Subject to the modifications in para, 7.3 being incorporated, it is recomended that the Canberra P.It.3 he cleared for the carriage and release of three 8 inch photoflashes on and from the top three positions of a No.1 Mark 1 Multi-store carrier within the limitations detailed in M.O.S. Trials Pro-forraa 1/53 R.D.Arm.2, viz:-
7.2.1 Carriage
(i) Flare Bay Doors Closed, to maxinuu permissible speed and height of the aircraft through normal manoeuvres to maximum G limitations of the aircraft.
(ii) Flare Bay Doors Open, up to and including 350 knots I,A.S. or 0.75 I.M.N. whichever is the lesser value, to 20,000 feet in straight and level flight and in angles of olirib and dive of 10° through normal manoeuvres to the maximum G limitations of the aircraft.
7.2.2 Release. Up to and including 350 knots I.A.S. or 0.75 I.M.N. whichever is the lesser value, in straight and level flight from 6,000 feet to 20,000 feet inclusive.
7.3 Modifications. It is recommended that the following modifications be incorporated in the 8 inch photoflash installation of the Canberra P.R.3 aircraft.
7.3.1 Those modifications enumerated in the 12th Part of A.& A.E.E. Report No. 861/2 para. 7.1.1 and in para. 5.1.1 of this Report.
7.3.2 Modification of the No. 1 Mark 1 Multi-store carrier to make it suitable for the carriage and release of three nose fuzed 8 inch photoflashes.
7.3.3 Replacement of the existing flare beam crutching pads with reaction screws,
7.3.4 Modification of the flare bay door switch installation so that the switches are unaffected by small movements of the flare bay doors in flight.
7.4 Jettison. As the 8 inch photoflash fitted with a M111-A.2 fuze will function on impact even if released "SAFE", it is recommended that they should be jettisoned "LIVE" over friendly territory.
Circulation List
D.Arm.R.D.(Air) 8 Covies 1 for Action A.D.R.D. Projects 1 Copy A.D.R.D.Q. 1 " A.D.A.R.D.(T) 1 " A.D.R.D.L.2/3 2 Copies D.1.Arm. 1 Copy R.D.T.1. 1 " R.D.T.3. 1 " Serv. R.D. Admin. 1 " T.P.A.3/T.I.B. 60 Copies R.A.E. Library 9 " M.A.E.E. 1 Copy R.T.0. English Electric 2 Copies
Appendix A to 14th Part of Report No. AAEE/861/2.
Proposed Modification to No. 1 Mark 1 Multi-store Carrier
1. This modification is necessary to adapt the No. 1 Mark 1 Multi-store Carrier for the carriage and release of three 8 inch photoflashes from Canberra aircraft.
2. Parts required
Section Reference No. Nomenclature Quantity (per carrier)
5D 1478 Fuzing Units No. 2 Mk. 1 3 Mounting Brackets (see Fig.3) 3
11A 2329 Fuzing Slide 4" long 3 28S 2766 Screws m/s Cheese head 2BAx£" 4 28M 6057 Nuts, Slnnonds 2BA 4 28W 13378 Washers, 2a; 4 5D 1733 Plugs, seven pole 1 5D 512 Plugs, five pole 1 5E 2108 Cable, duvin As required 5E 2116 Cable, septuvin As required
3. The estimated time per carrier is eight man hours.
4. Sequence of operations
4.1 Remove the electrical plugs "A" and "B" frcn their sockets in the junction box.
4.2 Disconnect the lover pylon jettison links from the bell crank levers on the rear cross member of the carrier frame.
4.3 Remove the eight crutch pads frcm the cross members adjacent to the lower pylon points of attachment.
4.4 Remove the bolts securing the pylons to the attachment brackets and take out the two lover pylons.
4.5 Replace the eight crutch pads in the front and rear cross members of the carrier frame.
4.6 Remove the release unit housing securing bolts and reposition the housings in the intermediate position.
4.7 Remove the fuzing units from the rear cross member.
4.8 Fit the fuzing units on the front cross member using the brackets shown in figure 3. The outer brackets are secured in position by the bolts holding the upper outer pylons. The centre bracket is held in position by four 2BA bolts attaching it to the plate carrying the junction and link boxes, the position can be seen in Figures 1 and 2.
4.9 Alter the wiring of the multi-store carrier to conform to the wiring diagram shown at Figure 4.
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FIG.I. Threat' Photoflashes on Ho.l. Hk I Multi -Store Carrier.
FIC.2. Fuzing Arrangements for 8' Photoflashes.
A.&A.E.E. NEG.No. 16021.
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[dstl] Information Centre Knowledge Services [dstl] Porion Down Salisbury Wills SP4 O.IQ Tel: 01980-613753 Fax 01980-613970
Defense Technical Information Center (DTIC) 8725 John J. Kingman Road, Suit 0944 Fort Belvoir, VA 22060-6218 U.S.A.
AD#: Date of Search: 13 February 2007
Record Summary: Title: Canberra PR Mk 3 VX.181 (2 x Avon 1): functional trials of 8 inch low terminal velocity photographic flash Covering dates 1954 Jan 01 -1954 Dec 31 Availability Open Document, Open Description, Normal Closure before FOI Act: 30 years Former reference (Department) 861/2 Pt 14 Held by The National Archives, Kew
This document is now available at the National Archives, Kew, Surrey, United Kingdom.
DTIC has checked the National Archives Catalogue website (http://www.nationalarchives.gov.uk) and found the document is available and releasable to the public.
Access to UK public records is governed by statute, namely the Public Records Act, 1958, and the Public Records Act, 1967. The document has been released under the 30 year rule. (The vast majority of records selected for permanent preservation are made available to the public when they are 30 years old. This is commonly referred to as the 30 year rule and was established by the Public Records Act of 1967).
This document may be treated as UNLIMITED.
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