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Re: Skin-on-Frame: Sea Sled catamaran prototype
By:Carl Delo
Date: 7/3/2008, 8:10 pm
In Response To: Re: Skin-on-Frame: Sea Sled catamaran prototype (Etienne Muller)

: Hi Bill,

: No matter what the angle of attack, I think that as long as there is a flow
: differential between the two sides of a hull you are going to get lift,
: less a low speed, but water is quite dense compared to say air, so a
: smallish area at even low speed might fall under the influence of lift.
: consider that a hang glider gets lift at a wind speed of only 20 mph in
: air. The fin on a windsurfer, perhaps only 30 sq inches, generates lift at
: 10 - 15 mph or even less.

: I watch with interest.

: Et

Yes, there will be lift, if you can call a horizontal force lift, because the hull is a very skinny asymmetrical airfoil. Asymmetrical foils have a mean camber so can indeed generate a lifting force at zero angle of attack. If the force is significant at cruising speed, there will be a large splashing sound as the lateral forces pull my hulls apart, dropping me into the drink, film at eleven....

Messages In This Thread

Skin-on-Frame: Sea Sled catamaran prototype *LINK*
Carl Delo -- 7/1/2008, 11:36 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/3/2008, 1:30 am
Re: Skin-on-Frame: Sea Sled catamaran prototype *Pic*
Carl Delo -- 7/3/2008, 8:47 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/3/2008, 9:38 am
Re: Skin-on-Frame: Sea Sled catamaran prototype *LINK*
Carl Delo -- 7/3/2008, 8:34 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/3/2008, 9:43 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/2/2008, 1:31 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Etienne Muller -- 7/2/2008, 6:35 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/3/2008, 1:58 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Etienne Muller -- 7/3/2008, 9:19 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Carl Delo -- 7/3/2008, 8:10 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/10/2008, 3:10 am
Re: Skin-on-Frame: Sea Sled catamaran prototype *LINK*
Carl Delo -- 7/10/2008, 9:04 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/11/2008, 10:04 am
Re: Skin-on-Frame: Sea Sled catamaran prototype *Pic*
Carl Delo -- 7/11/2008, 10:53 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/11/2008, 11:28 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/21/2008, 1:38 am
Re: Skin-on-Frame: Sea Sled catamaran prototype *LINK* *Pic*
Carl Delo -- 7/22/2008, 10:39 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/23/2008, 9:53 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Carl Delo -- 7/23/2008, 10:20 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/24/2008, 3:04 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Carl Delo -- 7/24/2008, 11:41 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/25/2008, 12:21 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/26/2008, 2:07 am
Re: Skin-on-Frame: Sea Sled catamaran prototype *LINK*
Carl Delo -- 7/27/2008, 11:45 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/29/2008, 4:26 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype *Pic*
Carl Delo -- 7/29/2008, 4:48 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/31/2008, 9:00 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Carl Delo -- 7/31/2008, 9:36 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/31/2008, 6:55 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 8/4/2008, 12:53 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 8/6/2008, 3:52 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/31/2008, 12:39 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype *Pic*
Carl Delo -- 8/1/2008, 12:40 am
Re: Skin-on-Frame: Sea Sled catamaran prototype *LINK*
Pablo -- 9/26/2008, 3:14 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype *LINK*
Pablo -- 9/26/2008, 3:18 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Carl Delo -- 9/27/2008, 11:17 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 8/1/2008, 9:45 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/30/2008, 1:45 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/28/2008, 2:37 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/24/2008, 10:54 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/23/2008, 3:24 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/23/2008, 8:49 am
Re: Skin-on-Frame: Sea Sled catamaran prototype *NM*
Bill Hamm -- 7/23/2008, 8:45 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/10/2008, 4:47 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/5/2008, 1:52 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Carl Delo -- 7/5/2008, 6:54 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/5/2008, 7:43 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype *Pic*
Carl Delo -- 7/5/2008, 11:38 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/7/2008, 6:55 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/8/2008, 5:57 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/6/2008, 2:10 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/5/2008, 7:39 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Etienne Muller -- 7/4/2008, 4:53 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Carl Delo -- 7/2/2008, 10:05 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/2/2008, 12:22 pm
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/2/2008, 9:34 am
Re: Skin-on-Frame: Sea Sled catamaran prototype
Bill Hamm -- 7/2/2008, 9:20 am