So a lubber question here: all those cats in the video flying a hull at about 45 degrees - is that optimal? I am sure it is sexy and feels like a rush (I figure it does - I can't do that yet), but is it not just much more precarious way to spill wind out of your sail by tilting it (and thus reducing the effective sail area) than sheeting out till your windward hull is just skimming the water? Just curious...
You're correct, just skimming the waves with the windward hull maximizes the driving force the sailplan can produce, while minimizing hydrodynamic drag by reducing wetted surface with one hull out of the water. Any additional heeling reduces the efficiency of the sails, without further reducing wetted surface area(and may increase it some). And the foils become less effective as heel increases as well.
Thanks for sharing, John. I am in that video at 7:15, the guy in the back row on the right edge, in the white shirt and blue cap with gold birdsh*t on the brim. We were all lined up getting a trophy shot at the '82 MidWinters in San Felipe, Mex. It was Feb and cold and the wind blew 30 knots the second day. 78 boats total. Really good times.
-- Sheet In!
Bob
_/)_____/)_/)____/)____/)_____/)/)__________/)__
Prindle 18-2 #244 "Wakizashi"
Prindle 16 #3690 "Pegasus" Sold (sigh)
AZ Multihull Fleet 42 member
(Way) Past Commodore of Prindle Fleet 14
Arizona, USA --
Cool.... but that guy is way too good looking to be you, you sure it is you?
Yeah, I always look better blurry and in the back.
-- Sheet In!
Bob
_/)_____/)_/)____/)____/)_____/)/)__________/)__
Prindle 18-2 #244 "Wakizashi"
Prindle 16 #3690 "Pegasus" Sold (sigh)
AZ Multihull Fleet 42 member
(Way) Past Commodore of Prindle Fleet 14
Arizona, USA --