how does everyone feel the performance would be?
Worse than building a catamaran of similar specification. If I am wrong, then I think we will see a number of A-Class trimarans.
The thing about trimarans is that you always have two hulls in the water and you have three hulls. Both of these factors will make the trimaran slower, I think.
Why Trimaran? Is there some other reason why you prefer the tri over the cat?
I seem to recall that the designer's take on this is that if you want the overall best performance without worrying about cost, build a tri. If you want the best performance for a certain budget build a cat. This is in respect to the big class of boats.
Depending on the design of the tri, the main hull may not in the water, or in other designs may plane (Farrier), depending on conditions.
A-cats being restricted to a 7.5' beam would preclude any benefit from doing a tri.
