Copyright 2017 - Woods Designs, Foss Quay, Millbrook, Torpoint, Cornwall, PL10 1EN, UK
  • home built Flica 37

  • plywood Romany 34

  • lightweight 14ft Zeta mainhull

  • Strike 15 trimaran at speed

  • 28ft Skoota in British Columbia

  • 10ft 2 sheet ply Duo dinghy

  • 24ft Strider sailing fast

  • 36ft Mirage open deck catamaran

PLYWOOD
Hull skins keel - stringer 2   3 mm ply       11 sheets
Topsides              5 or 6 mm ply 6 sheets
Bulkheads                              6 mm ply         3 sheets
Beamboxes                             6 mm ply         1 sheet
12 mm ply         1/2 sheet
Decking                                  5 or 6 mm ply  8 sheets
Keels                                       9 mm ply          1 sheet
Rudders                                18 mm ply          1/2 sheet
Platform/cockpit                    9 mm ply           3 sheets
Beams                                     6 mm ply            3 sheets
Use best quality gaboon throughout. Note if 5mm ply is un-obtainable then 6 mm ply can be used.
18 mm ply can be made from 2 layers of 9mm ply and 12mm from 2 layers of 6 mm ply.

TIMBER:
Use douglas fir, sitka spruce, yellow cedar or similar unless noted
Note sizes are nominal and should be "planed all round"(PAR) ie final
size of 1 " x 1 " = 20 x 20mm

1 " x 1 "                    70m
1 1 / 2 " x   3/4 "    120m
2 " x 1 "                  160m
1  1/2 " x 1  1/2 "     22m
3 " x 1 1 / 2 "             2m
3" x  3/4 "                10m
2" x 2"                       3m
3" x 1"                       4m
1 1/2" x 3/4"             15m (hardwood for outer gunwale)
2 " x 1 1 / 2 "             4 off 4100mm plus 15m (beams)
1" x 1 1 /2"                8 off 4100mm pllus 10m (beams)
4" x 1"                       2.5m
4" x 2"                        2m (cedar, outer stem - can be laminated from smaller pieces)
6" x 1"                       12m (keel planks - can be laminated )
4" x 1"                        15m
3" x 1"                         5m (hardwood - sacrificial keel)
3" x 2"                         1.5m

GLASS:
15 metres 100 mm wide glass tape
15 m2 minimum of 300 g glass cloth + 5 kg epoxy. 20 m2 cloth is required if decks  are sheathed.
NB glass must be compatible with epoxy
GLUE: minimum 10 kg epoxy and 20 kg resorcinol or polyurethene glue eg Balcotan
FILLERS: 500 g collodial silica & 1000 g Microballoons (min)
FASTENINGS: approx  5000 12 mm staples
500 g 3/4" "gripfast" nails
500   3/4"  no. 6 bst steel CS screws
100 1 "  no. 8 st steel CS screws