A crab claw sail has an additional adjustment, the forward downhaul. On a
small experimental sail I found myself having to adjust both the main
sheet and the forward downhaul with wind shifts. I think the crab claw
which is very powerfull is better suited to steady offshore winds. I don't
know what arrangement is planned but tacking the usual crab claw sail is
more effort than tacking a sail whose leading edge runs up a fixed spar or
line. What is it about a simple traingular, gaff or sprit cat or sloop rig
that is difficult?


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