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136 BOAT BUILDER'S HANDBOOK
Craft PrintProject No. 64
Its design is versatileenough to permit the useof inboards, outboards orsails as power, but SeaSkiff is first and foremost
a fisher.
SEA SKIFFBy WILLIAM D. JACKSON
Naval Architect
Designed for the man who likes to fish, this sturdycraft can be rowed, powered by an outboard or
by an inboard, or driven by the wind
SEA SKIFF is quickly built over forms forconstruction of one or for several boats. It isplanked with waterproof plywood and will
retain its leakproof qualities even if left to dryin the sun for long periods. An ingenious methodof framing makes for a sturdy boat and providesa hull that will give many years of trouble-freeservice.
The general design presents a sturdy skiff thatmay be used on any waters anywhere. The boatmay be rowed, powered with air-cooled inboardmotors or outboard engines, or rigged for sailing.As a sailer it is dry, light, and fast in a goodbreeze.
Start construction by obtaining the materialslisted in the Materials List. Then saw the form(Fig. 2) to shape and mount it on 2 x 4 legs at aconvenient working height. To construct themould frames, stem and transom (Figs. 3 and 4)accurately, draw full-size paper patterns of theseparts, lay your material upon outlines, mark andcut to shape, reassemble on the pattern andfasten. The transom is cut from ¾-in. plywoodwith a ¾ x 3-in. frame, fastened with #8x1½ fhscrews, inserted from the aft side of the transom.
Saw the mould frames from 1x6; fasten at chinejoints with 3/8-in. plywood gussets. If thesemoulds are to be used several times, glue andscrewfasten the gussets, afterward attachingcross pieces to prevent misalignment. The stemis sawed to shape as shown in Fig. 3.
STATEMENT OF USESUSES: Seaworthy craft for use on any waters anywhere,
for boat liveries as well as for personal use.
TYPE: Skiff.
LENGTH: 13 ft. 9 in. to outside stem.
BEAM: 60 in.
SEATING CAPACITY: Five passengers.
POWER: Oars, outboard, air-cooled inboard, or sail.
Now mount the transom, mould frames andstem on the form and hold in place by bracing.With everything secured, spring a light battenover the framework and mark correct beveling sothat plywood will lie evenly and fair at all points.
With all parts beveled, cut notches for clamps,chines and keel in all parts. Spring the keel inplace and attach to transom, frames and stemnotches with two #10x2-in. fh screws at eachjoint. Be careful not to attach any members tothe moulds, as the hull is later to be lifted clearof the form and moulds when planked.
Now secure the chines. Fasten both chinessimultaneously to prevent wringing frameworkout of shape. Use one #10x2-in.fh screw attransom joints, bevel the ends to fit the stem andfasten in the same way. If the chines have atendency to slip off the mould-frame notches,hold temporarily with small angle irons screwedto moulds and chines (see detail, Fig. 2). Whenhull is planked, simply remove the screws and liftthe hull clear. Continue by attaching clamps in
BOAT BUILDER'S HANDBOOK 137
similar fashion, fastening at transom and stemwith one #10 x 2-in. fh, screw to each joint.
Trim and fair the entire framework so the ply-wood will lie evenly at all points. Hull may becovered with either full-length or 8-ft. length ply-wood. Using 8-ft. lengths, cover the sides first witha length of plywood clamped in place. Mark andcut to shape. A butt strap ¾ x 4 in. fitted betweenclamps and chines secures the butted joints ofplywood on sides and bottom. Before fasteningthe plywood, coat chines, clamps, transom andstem with Weldwood glue. Place plywood inposition and fasten with #8 x 1-in. fh.screws spaced about 2 in. apart.
With both sides attached, trimedges evenly. Install the skeg (ifyou don't plan on using an inboard)and short keel. The skeg is fittedclosely and held temporarily with afew screws. Later, when the hull isturned over, the skeg is fastenedwith screws from the inside.
Lay 8-ft. lengths of plywood inposition on the bottom, marking andcutting to shape. Before attachingplywood, coat all adjoining surfaceswith Kuhls aviation glue. Lay clothstrips about 1-in. wide on gluedarea, recoat and lay plywood in posi-tion, fastening with #8 x 1-in. fh.screws spaced about 2-in. apart.Cover remainder of bottom similarly
—and don't fasten plywood to moulds.Trim fore end of hull along stem and cover
exposed edges of plywood with an outer stem½ x 1½-in., softened with hot water, bent andscrew-fastened in place.
Now remove the hull from the form and turnit right side up. Seat risers are attached byspringing to sides and securing with #8 x 1-in.fh screws inserted from outside hull.
Fasten ribs in place next. Mark locations onkeel and secure each rib with two #8xl½-in.fh screws. The center of each rib is drilled and
25"NOTCH FORM AND FRAME
41"
38-40"
9½"
NOTCH41" 31½"
4¾"
1x4"C H I N E AND CLAMP
2x4"#7x 3"
4RH.
FRAME
A N G L E IRONHOLDS MEMBERSD U R I N GCONSTRUCTION
1x4" TOHOLDSTEM
FLOOR L I N E
CARRIAGEBOLTS x5"
STEM -2" OAK
1"½"
4
2"
2¼"I"4 ¼"
4"4"
4"
4"3¾"
½"
PLYWOOD
23"
15¾"
SECTION
7"
13½"
24"
24"
4
7"4"
4
3"
ASKEG SEE DETAIL
PLYWOOD
BOTTOM RIBS½ x 1¼" KEEL
x 4"
CHINE¾X 1¾"
¾ x 1¾"
SEAT RISER
SEAT ¾ x 8" (12 WIDTHS)
C L A M P ¾ x 1 ¾ "M O U L D I N G
4¼"
23½"
1 x 6"
MOULD
1 x 6"
MOULDPLYWOODGUSSETT 17½"
1 x 4"1 x 4"
2819¾"
16"
30"
5"1 x 6"1 x 3"
4"
15¾"TRANSOM
AND F R A M E¾"PLYWOOD
PLYWOODGUSSETT
NOTCH
18¼"
MOULD
1 x 4"
1 x 3" 1 x 6"
1 x 6"
2" 23½" 23"
Covering the frame with plywood.
The completed framework.
a galv. shingle nail inserted, clinched on theinside. A little Weldwood glue under each ribwill ensure a rigid job.
Install seats as indicated, fastening them to the
risers with #8 x l¾-in. fhscrews. Cut the breast hookand transom knees to fitand fasten with #10 x 2-in.fh screws. Fasten mould-ings in place with #8 x 1¾-in. fh screws spaced about8 in. apart. Screwfastenfloor boards of 3/8-in. ply-wood or 5/8 x 6-in. boards.Smooth hull and apply oneor two coats of sealer. Fol-low with two coats each ofwhite primer and paint orenamel. If you cover bot-tom with fiber glass (ma-terials and instructions forapplication of this materialare available from Herter'sInc., Waseca, Minnesota),complete f reedom f romworm damage is possible insalt water and strength isgreatly increased in eithersalt or fresh water.
For use of Sea Skiff as asailboat, see Fig. 7 for com-plete details. An air-cooledinboard, such as the 1¾hp Reo Trollabout InboardMarine Engine (WilliamsMarine Co.) or a 3.6 hpClinton engine, may bemounted off center or onthe center line of the boat.With an off-center installa-
tion, the centerboard used in sailing can be leftintact and you can use sail also. You may prefer tomount your engine on center, however, and fore-go sailing equipment. If you mount inboard on
BOAT BUILDER'S HANDBOOK138
TRANSOM KNEE
STERN SEAT MOULDCHINE
FLOORBOARDS
PLYWOOD JOINTS
SHEER CLAMP
SEAT RISER
BREASTHOOK
STEMMASTSTEP
SEATRIBS
MOULDS
BED LOG
TRANSOM ANDFRAME 25½"
5½"
AFT SEAT SUPPORT
RIB LOCATION
( REMAINING RIBS16" O.C.)
AFT SEAT SUPPORT
20"LIGHT BATTEN
SEAT KNEE2¾"
11¾"
9½"
MOULD
RIBSSEAT KNEE FLOORBOARD
SEAT RISER MOULD
3"
BEDLOG
CENTERBOARDCASE
GLUE-FERDICO RESIN SLUE
PLYWOOD JOINTS
NOTE: IF INBOARD IS USED.DO NOT USE SKEG
REMOVE AFTER SHEATHING
SEATS
CHINEMOULD
KEELSON
STEM
SHEER CLAMP
MAST STEP
41"OUTER KEEL
41"41"41"
SKEG
BOAT BUILDER'S HANDBOOK 139
SEATRISER
(1 x 12")
14"APPROX.CUT TO FIT
2" INSIDECASE
15"
PLYW. SIDES
FIT HERE ¾"STOCK
FLEXIBLEWIRETRAVELER
SCREWEYE
2"
SHEET TRAVELER
SLIDE
SHEETBOOM ALUMINUM x 1"
BOLT
¼ x 2¼"
SHEAVEIN MASTTOP
1" #8R.H.SCREWS
THIMBLE
30°2"
3"
6"
15"
GAFF 10'-0"
TAPER ROPE,SERVE WITH#18 - #20 WIREAND WIPE WITHSOLDER
2¾"
CENTERBOARD CASENOTCH
KEEL
21½"
RUDDER
½-¾" PLYW.
WATERPROOFWITH 3 COATS
OFCASTOGLAS
20"
1¾" 30° 2" SQ.
9¼"PLYW.
14½"
37¾"DAGGER TYPECENTERBOARD
8"ROACH
46°2"SQ.
WATERPROOF WITH3 COATS OF CASTOGLAS
LEACH17'-0"
¼ MANILA ORCOTTONRINGS
TOPPING LIFT
¼" MANILA HALYARD
1" #8 F.H.S.
¾"BLOCK
MAST
1¼"
12"
1½"
2½"¾"
1¼"FULL WIDTH
OF WAY TO TOPTHEN TAPER TOLUFF
14'-6"CENTER EFFORT85 SQ. FT. 1¾"SQ..ROUNDING
AFTER GLUE DRIES
6'-10"
STRAP IRON JAWSBEND EDGE WISE
(SEE DETAILBELOW)
MAST 12'-0"
#2 MOLD FRAME LINE
MAST
SAIL
TILLER(1 x 4" REQ)
BOOM
SLIDE-GOOSENECK
41"
4½"
¼" LINENYLON ORMANILA
BLOCK ON EYE STRAPFOOT 10'-9"
BOOM 11' -0"
54"
AT2" STA.#3 15"
15"
2¼"
BOOM AND GAFF
SECTIONS
MOULDING
¼" BLOCK
12-14"4" NOTCHBELAY CLEAT SEAT
¼"TURNBUCKLEPETITE STYLE1¾"
SKEG &SECTION¾"
OAK CORE
SEAT RISER LINE15"
9½"C.L.R. C.E. SAILSCHINE LINE
LOCATE FROM MOULDS,STEM, AND TRANSOM
1¼"¾"
#2 #1
1½"
3½"
5"
25°
7½"
PLYW. SIDES
#3
GAFF
BENDEDGE-WISE
1"- #8 FHS
MAST
x 1 x 13"
STRAP IRONJAWS
3½" 12"1¼" SQ.
MAST STEP
2 x 4" STOCK- FASTEN WITH
2¼"- #10 F.H.S.
¼"BLOCK
CHAIN PLATE
¼"BOLT
INWALE ¾"
1"- #8 F.H.S.x 1"
ALUMINUM
SEATRISER
(1x12")
14"APPROX.CUT TO FIT INSIDE
CASE2"
CENTERBOARD CASE
PLYW. SIDES
FIT HERE
15"
¾"STOCK
BOAT BUILDERS HANDBOOK
FLEXIBLEWIRETRAVELER
SCREWEYE
2"
30°NOTCH
SHEET TRAVELER
SLIDE
SHEETBOOM ALUMINUM x1"
SHEAVEIN MASTTOPBOLT
¼ x 2¼"
THIMBLE
1" #8RH.SCREWS
2"
3"
139
TAPER ROPE,SERVE WITH#18 - #20 WIREAND WIPE WITHSOLDER
6"
GAFF 10'-0"
15"
2¾" 12"
1½"1¼"
54" MANILA HALYARD
1" #8 F.H.S.
8"ROACH
TOPPING LIFT
BLOCK¾"
LUFF14-6"CENTER EFFORT
85 SQ. FT.
MAST
¾"2½"
154"FULL WIDTH
OF WAY TO TOP
THEN TAPER TO
SQ. ROUNDING1¾"AFTER GLUE DRIES
6'-10"
STRAP IRON JAWSBEND EDGE WISE
(SEE DETAILBELOW)
MAST 12'-0"
#2 MOLD FRAME LINE
15"
MAST
254"
BOOM AND GAFF
SECTIONS
¼" BLOCK
MOULDING
BELAY CLEAT SEAT
4" NOTCH 12-14"
TURNBUCKLEPETITE STYLE
54"1¾"
15"AT
2" STA.#3
FOOT 10'-9"
¾"
OAK CORE
SEAT RISER LINE
CHINE LINE
#1LOCATE FROM MOULDS,STEM, AND TRANSOM
1¼"¾"
#2
C.E. SAILSC.L.R..9½"
15"
54"
PLYW. SIDES
#3
3½"
25°,
5"
SKEG &SECTION
1"- #8 FHS
MAST
GAFF
x 1 x 13"
STRAP IRONJAWS
BENDEDGE-WISE
3½"12"
1¼" SQ.
1½"x 1"
ALUMINUM
1"- #8 F.H.S.
INWALE ¾"
BOLT54"CHAIN PLATE
BLOCK
MAST STEP
2 x 4" STOCK- FASTEN WITH
2¼"- #10 F.H.S.
4½"
41"
TILLER(1 x 4" REQ)
¼" LINENYLON ORMANILA
BLOCK ON EYE STRAP
SLIDE-GOOSENECK
BOOM
BOOM 11'-0"
7½"
WATERPROOF WITH3 COATS OF CASTOGLAS
SAIL
% MANILA ORCOTTONRINGS
17'-0"
LEACH
46°2"SQ.-
DAGGER TYPECENTERBOARD
PLYW.
37¾"
9¼"
14½"
30°1¾"
20"
21½"
RUDDER,
½ - ¾" PLYW.
WATERPROOFWITH 3 COATS
OFCASTOGLAS
2"SQ.
KEEL
140 BOAT BUILDER'S HANDBOOK
center, move the amid-ships seat forward. TheReo Trollabout comes inkit form (about $100 forfresh water installations,$125 for salt water),with complete instruc-tions for installing. Foruse of Sea Skiff withoutboards, cut out tran-som as indicated in Fig.8, or attach an outboardmotor bracket (such asthat made by the HadleyMfg. Co., 2242 SmeadA v e n u e , T o l e d o 6 ,Ohio), to the transom.
(Note: Possessing theadvantages of greatstrength together withlight weight, and moreeasily built than craft
that follow conventional rules of construction,Sea Skiff, as mentioned earlier, is easily massproduced. Moreover, a set of full-size paper pat-terns—required for one or 100 Sea Skiffs—lendthemselves to rapid mass production.)
MATERIALS LIST—SEA SKIFF
LUMBER REQUIREDSize and DescriptionNo.
2222126
¾ x 1¾" x 14½'¾ x 1¾" x 14½'¾ x 1¾" x 14'7/8 x 4" x 12'¾ x 1½" x 8'¾x 1¼" x 14½'½ x 1¼" x 4½'¾ x 3" x 8'1
1 1¼ x 10" x 3'
11
3
111
2 x 8" x 4'½ x 1½" x 4'
¾ x 8" x 12'
1 x 4" x 12'1 x 6" x 12'2 x 10" x 12'
PLYWOOD REQUIRED41
4 gross6 dozen3 dozen3 dozen1 lb.2
1 lb.paint as neededWeldwood resin glueKuhls aviation glue5/16 x 5" carriage bolts1¼" galv. shingle nails#10 x 2" fh screws1¾" fh screws1½" fh screws1" fh screws
or 5/8 x 6" boardswaste from 3/8" plywood¾ x 24 x 48"3/8 x 4 x 8'
FASTENINGS
Use
clampsseat riserschineskeelsonoutside keelmoldingsribstransom framebreast hook and
transom kneesstemoutside stemskegseatsaft seat supportmold framesmold framesform
plankingtransom
floor boards
CLAMP ¾ x 1¾"
MOLDING1¼ x ¾"
AKEEL ¾ x 4
PLYWOOD CENTER BOARD CASE
SEAT RISER
¾ x 1¾"CHINE ¾x1¾"
SEAT (THWARTS)¾ x 7½"- 2 WIDTHS
SECTION AT#2 MOLD
BED LOGS x 2"
CUT FROM 2 x 4"
X-MARKSX=COAT KUHLS AEROMARINE GLUE ANDPROVIDE CLOTH GASKETS
1" #8 FH. SCREWS SPACESCREWS SO NOINTERFERENCEWITH BED LOGBOLTS - 2½" APARTAPPROX.
CENTER BOARD CASECONSTRUCTION DETAILS
INDENT-FULL PLASTIC WOOD
(CUT 2" DEEP AND FITTHIS POINT WILL BE &
TO KEEL-ATDEEP)
BED LOGS x 2" FIR-HEMLOCK 16½"
KEEL x 4"
BEVEL
BOTTOMPLANKINGPLYWOOD
BOLTS x 3" BRASS, BRONZE, ORGALV. WASHERS UNDER 4 - BOLTSEACH SIDE
1 x 6"
1 x 4"
CUTOUT
"i"
V
2½ x ¾" ADDED
TRANSOM
1 x 6"
CUT OUT TRANSOMFOR 1-5 HP OUTBOARDS
-OAR LOCK
SEAT KNEE
TRANSOM
NOTE: PHANTOM OUTLINEINDICATES FLOORBOARDS
SEAT SUPPORT
KNEE
SKEGCLAMP
•OUTSIDE KEEL
SEAT RISER
CHINEKEEL
OUTSIDE STEM
STEM
BREAST HOOK
MOULDING RIBS BATTEN
111"