Thanks for answering my question James,

Actually about 2 year ago I propose the control of a foiling Moth as a 2nd year design assignment for control systems students at my university. I thought it was an excellent concept vehicle to have them try to design a proper controller to ease the load of the sailor. I feel that relatively simple control concepts can go a very long way in stabilizing the Moth while sailing

The problem with a catamarn is of course that it will have two foils (each in one hull) and that leads to a multivariable control situation where control actions on one foil setup will have a noticable effect (disturbance) on the other foil setup. This is typically a difficult control problem to solve.

I feel hydroptere is on the right track with regard to a viable full foiling multihull, but I don't think it is a very good windward/leeward racer. Its bruce foils provide a level of automatic control that you just don't have with T-foils. That is one reason why foiling motorboats often used the V-foil setup.

I am however convinced that the path to succesful foiling requires the assistance of a skilled control systems engineer and that had been lacking up to now. The rave was apparently hard to control and only the Hobie Tirfoiler seem to have gotten the T-foil setup working right on a multi hull. I think that was mostly due to the way they had implemented the control setup.

But I wish everyone who tries the best of luck.

Wouter