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

Materials List

PLYWOOD:
Hull skins keel-stringer2  3 mm ply 11 sheets
topsides  5 or 6 mm ply 6 sheets
Bulkheads  6 mm ply 3 sheets
Daggerboard and beamboxes  6 mm ply 2 sheets
12 mm ply 1/2 sheet
Decking  5 or 6 mm ply 8 sheets
Rudders & daggerboards    12 mm ply 2 sheets
Platform 9 mm ply 1 sheet
Beams 6 mm ply 3 sheets
Use best quality gaboon throughout. Note if building the racing version then ply thickness on decks & topsides can be reduced to 4 mm, but decks must then be sheathed.
18 mm ply can be made from 2 layers of 9 mm and 12 mm ply 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, ie final
size of 1" x 1" = 20 x 20 mm
1 " x 1 "   70m
1 1/2" x 3/4"  120m
2" x 1"   125m
1 1/2" x 1 1/2"  12m
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 (for outergunwale - hardwood)
2" x 1 1/2"   4 off 4100mm plus 15m (beams)
1 " x 1   1/2"  8 off 4100mm plus 10m (beams)
4" x 1"   3m (inner stems)
4" x 2"   2m (outer stems use cedar, can be laminated from smaller pieces)

GLASS:

1 sq m 600 g Woven Roving or biaxial
15 metres 100 mm wide glass tape
15 sq m minimum of 300 g glass cloth + 5 kg epoxy. 20 sq m extra cloth is required if decks are sheathed. NB glass must be compatible with epoxy

GLUE: minimum 10 kg epoxy plus 20 kg resorcinol or 5 kg polyurethene

FILLERS: 500 g collodial silica & 1000 g Microballoons.

FASTENINGS: approx  5000 12 mm staples
500 g 3/4" barbed ring nails eg "gripfast" nails or st steel screws
500 3/4" no.6 st steel CS screws
100 1" no.8 st steel CS screws

Note: Strider can also be built using strip plank cedar hulls and ply decks, see the Merlin materials list for more details