Here we are busting out through the surf in 30mph winds at Stinson Beach California on the maiden voyage. The boat works great! There are no swimmers or surfers out because of the rough conditions. The kids are on the beach making forts out of their boogieboards instead of surfing.
Hull Length 24 ft at deck
Hull 22" wide amidships at deck, 18" wide inside hull (there's a wide lip at deck)
Hull 24" deep amidsnips. The hull round bottom is a semicircular arc of 8.25" radius.
Hull rocker is about 4" measured from points 16' apart.
Outrigger crossbeams are 14' 7" long 3.5"x2.5" fir beams tapering to 3x2.25" at ends
The outrigger floats are 4.5" diameter, 19 feet long with foam plugs in ends. ~134lbs buoyant.
The plugs in the front of the floats are shaped into a nose that protrudes 6.5" more.
1.5" diameter stainless steel tubing connects the crossbeams and floats.
The Sail is an 8 sq. meter crabclaw / leg-o-mutton sail on 14ft. windsurfer masts.
The mast is supported by three stainless steel cable stays.
Total cost of materials was $200 or less.
The outrigger floats are fiberglass chemical pipes full of empty plastic soda bottles.
The main hull is made from a pair of old 16' catamaran hulls cutoff and glassed end-to-end.
Junked catamaran hulls are easy to get. If you can't find a free hull, build a hull like the Kenya Canoe but bigger. Use scavenged plywood from crates if you want it free.
The wood for the crossbeams came from a big pallet, with the nails and crossboards pulled off. Then I scarfed them together for extra length.
The sail is blue tarp on windsurfer mast spars.
Great action photos by kenny