Alex.
I surely am happy to read that your sailmaking project went well and that it resulted in a well-performing sail. I still, after almost 30 years with cambered panel junk rigs, marvel over how well they perform.
http://tinyurl.com/yc6p3d5p
Here is a video clip of my Ingeborg from July, last year, with a sail that is quite similar to Bugsy's. We are beam-reaching at 6.0 knots in a moderate breeze (10knots?) - me jabbering into the camera, and mate Gøran at the tiller, with his usual “6-knots grin”.
Ingeborg’s hull speed with 6.05m wl. is only 6.0 knots, so 6.5-6.8knots is as much as I get out of her.
Cheers,
Arne