Gary:
If I saw the video correctly, from the force images, etc., the surface areas of the hull at speed are only about a quarter of the whole hull and on the rear quarter where he has a big rudder on each side. If the surface area of the hull approximates a much smaller hull shape, like a dinghy, then the rudder should be enough to hold leeway to a controllable amount..... It's the lift that our keels provide and I'm not sure he doesn't have some step or other shape in the hull under the water that might do the same thing..... I'm ready to fill out a APHRF handicap sheet and send it in just to shake it up a bit..... So now check out the web site for Formula-marine.com and scroll down to their Omer One Sail.... There is an article in the British journal of Yachting Monthly , October 2013 issue that tests this "Wing Sail " out on an Elan 37..... They have a short video with some dramatic views of this rig set up. Lots of good stuff going on out there...... http://www.formulamarine.com/projects-2/projects-carbon/omer-wing-sail The rest of their web sdite is also very interesting..... Best, Ron C. _____ From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Gary Russell Sent: Sunday, November 10, 2013 8:33 PM To: C&C List Subject: Re: Stus-List Flying lead keel Jake, Agreed. Gary On Sun, Nov 10, 2013 at 8:31 PM, Jake Brodersen <captain_j...@cox.net> wrote: Gary, With this type of design, a centerboard or other type of structure would be needed to avoid excessive leeway, On you second point, I agree. Stability will be vanishing as the bulb gets higher above the water. It could certainly make for some interesting sailing. Self righting might be an issue. Jake From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Gary Russell Sent: Sunday, November 10, 2013 8:28 PM To: C&C List Subject: Re: Stus-List Flying lead keel My first problem with this canting design is that a typical keel performs two functions; a counter-balance for the forces against the sail, and a lifting foil to generate lift to windward to counteract leeway. I only see the counter-balance in this design. My second problem with this design is the fact that as heel increases, the effect of the keel weight gets less, unless you continuously adjust the cant angle to keep it just above the water. Am I missing something? I'm not saying these are insurmountable problems, but I don't see them addressed in Speed Dream. Gary On Sun, Nov 10, 2013 at 7:22 PM, Chuck S <cscheaf...@comcast.net> wrote: Hey Dwight, That's an amazing canting keel design. Guess we have to wait and see if such ideas will sell in the future? Chuck Resolute 1990 C&C 34R Atlantic City, NJ _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com -- ~~~~~~~_/)~~~~~~
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