Originally Posted by bacho

Perhaps one of these would be a good starting point.
http://www.warrenlightcraft.com/ultralight20.html



The wake didn't look like 20 knots, but it was moving pretty well on a reach in what looked like about 11 kts TWS.

And it could have used more downhaul, a self-tacking jib, a nice bendy wing mast, an a asym spin or code gennaker.

What's the upwind tacking angle?

Jay