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Apr 28 8:13

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	Check this French Amphibian LSA. A cross between a Seawind and a Icon.<br /><br />It has a folding wing like a ICON. Looks like Icon has some competition.<br /><br /><a href="http://www.lisa-airplanes.com/">www.lisa-airplanes.com</a> Click on the UK Flag for English.		Attachments: Lisa Ultralight Amphibian


	I found the price point. 300,000. Euros. Icon is safe.

Don Maxwell - Jun 07,2010 Viewers | Reply


	Hydroptères sur un hydravion! C'est très cool. And it sure is a sleek looking airplane. Apparently they have at least one flying, but I couldn't find any solid info about production schedule.<br /><br />I'd never thought of angling the hydrofoils outward at the bottom. Terrific idea!


	Hydrofoils may be ok on smooth water, but I wonder how well they work in any waves.

Marty Corr - Jun 09,2010 Viewers | Reply


	Mark, here's a little bit of fun that suggests the hydrofoils will work great in waves... BIG waves!<br /><br />see <a href="http://www.youtube.com/watch?v=G02mEsshdxQ">http://www.youtube.com/watch?v=G02mEsshdxQ</a>


	Try hydrofoils on a pair of water skis. It's like riding a unicycle while skiing.

Frank A. Carr - Jun 08,2010 Viewers | Reply


	Ken, are you speaking from experience?


	Yup. Have had a pair at the family homestead in upstate NY since the 1960s.

Jamie Dantalis - Jun 09,2010 Viewers | Reply


	Were you as good as this guy was??<br /><br /><a href="http://www.youtube.com/watch?v=_LxkypTy9zA">http://www.youtube.com/watch?v=_LxkypTy9zA</a>


	He's cheating. Ours didn't have a seat. It was basically two full size skis attached to something like that the guy in the video had but on a pole 1/2 that length. Jumping was done, but not on purpose.

Don Maxwell - Jun 09,2010 Viewers | Reply


	He's pretty good--does rolls and loops while sitting on a chair with one leg.

Tom Yowell - Jun 10,2010 Viewers | Reply


	Interesting, but I wonder how those 'shark fins' are going to work out when you want to beach the plane on the shore.


	We played with the 'air chair' a lot in the late 80's. We were never as good as the guy in the video but it was an interesting lesson in air/hydrodynamics. As long as you kept the center of pull (how high you held your arms) within the range it was amazing how smooth and stable the craft was once the board rose above the waves. We also coined the term 'gurgle of death' as you could clearly hear the flow separating as the foil stalled. This was the point of the unrecoverable 'no return' if it wasn't arrested immediately. (kinda like a lot of planes)

Don Maxwell - Jun 11,2010 Viewers | Reply


	Does anyone know a source of hydrofoil material--aluminum or something like it that is already extruded or formed to the shape of a waterfoil? I want to fly a big canoe. (I'll post a similar notice in STS in case anyone wants to get technical about the subject.)

Eric Batterman - Jun 11,2010 Viewers | Reply


	http://www.mtmscientific.com/airfoil.html Or use Dan's old wing strut.


	$900 per order is a bit rich. It is amazing how little it takes to make it work and I'll bet you that a flat plate 'airfoil' works just fine. Don - try flat plate with a washer or two under the leading edge. It will take way less 'lift' than you think because the water has so much more mass than air. If you really want an 'airfoil', take a bar of aluminum and round the top corners and bevel the top with a grinder. Or split a bar stock with a bandsaw on diagonal and then file top edges.

Don Maxwell - Jun 11,2010 Viewers | Reply


	Ken, I tried a waterski hydrofoil something like you described, also in the '60s in the Adirondaks, and know what you mean about the density of water and its effect on both the hydrofoil and the human body. I'm very lazy, though, and have resisted that filing for decades. But maybe I'll take your advice now.

Don Maxwell - Jun 11,2010 Viewers | Reply


	Thanks, Eric. That's very good hunting! The small stuff is pretty thin, but I may buy 5 or 10 feet and see what comes of it.


	What's wrong with F/glass? Shape up from polystyrene, cover with cling film or even primer paint, wrap with f/glass and resin. Wide base shape spreads the load.

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