Some boats carry this type of sail all around the course. A few years
back I watched some Windrider Raves (a small foil riding trimaran)
racing, the ones equipped with screechers carried them up wind, much
faster at a lower angle, and beat the ones without quite handily.


Nav wrote:
That'll be foils not performing at low speed?

About half the ones without screechers were up on their foils most of
the time. Part of the issue was that the screechers made accelerating
out of tacks *much* quicker. But the tacking angles were very wide, some
boats that deliberately sailed high & slow were quite close in the hunt
(among the non-screecher boats).

It was interesting to watch, I would have liked to try racing one of
these boats.

Fresh Breezes- Doug King