Gardner Pomper wrote:
> This is probably a dumb question, but what is the problem with a
> "gaff" easyrig? By this I mean an easy rig with a boom at both the top
> and bottom of the mast, so that both the jib and main are rectangular
> in shape, instead of triangular? Everything I read indicates that a
> triangular sail is inefficient, and that more sail area higher up is
> better. I have seen solid wing sails in this configuration.
>
> I know weight aloft is a bad thing on a monohull, because it
> intensives the pendulum effect m the inevitable heeling, but on a
> multihull, which should never lift a hull (cruising, not racing proa)
> it doesn't seem like it will matter until you are in alot of trouble
> anyway. Plus, having a rectangular sail should lower the center of
> effort considerably, to keep you out of trouble.
Gardner, have you not seen the wingsail used on most of the Wharram
designs? It is exactly as you describe, with the exception of the lower
boom: it has none, but instead runs on a traveler between the hulls.
Here is a picture of my boat in the slip with the main up:
wingsail <http://farm2.
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