My lowest priority project at the moment, one that is still strictly in the planning stages, is to construct an outrigger, sailrig and sprayskirt to adapt a tandem tripping canoe for coastal sail travel.
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Adapted to a 17' abs or poly prospector-style canoe, the full rig would be:
- car-toppable
- relatively fast (estimate about 8 knots travel speed under decent wind)
- capable of carrying two people and enough cargo for extended wilderness trips
- quickly assembled or disassembled
- easily packed and unloaded
- much more seaworthy than a regular canoe
- durable enough to withstand running aground, landing and launching on beaches or rocks
The ama (outrigger) and akas (spars connecting the main hull to the outrigger) will be designed first, followed by the sail, leeboards and rudder. The spray deck will be built last to accommodate the modifications that protrude above the deck line.
The ama would be constructed from plywood, glassed over and fitted with Kevlar rub strips along the keel line. The bulkhead within the ama will provide cargo storage space, accessed through a watertight hatch.
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I am using Solidworks a lot for this project. It provides a quick, accurate method for determining displacement volumes and wetted surface areas of hull shapes under varying weight loadings, and bodies constructed of curved sheets (the plywood ama) can be unfolded to resolve the sheets' flattened shapes.
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