Author Topic: Interesting.  (Read 3249 times)

DavidJohn

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Interesting.
« on: July 06, 2017, 10:57:29 PM »

SURFFOILS

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Re: Interesting.
« Reply #1 on: July 07, 2017, 02:42:33 AM »
One of the first hydrofoil craft I saw was one that had 2 identical foils, 1 at the nose and 1 at the tail. The theory was that both would lift and the distance between them would create a stability like a long wheelbase.
 It was crap in anything but a lake because they both lifted at different rates due to the different pressure on each foil and theres a little known foil effect where as a foil reaches ( but doesn't break) the surface it loses lift, so whenever 1 foil was higher it failed and the whole craft crashed.
 In order for the above foil setup to work both foils would have to experience identical pressure, weight, rotataion, foil depth and current flow. More likely someones having a laugh.
 Later the Flyak was invented with a canard system which is a front foil that lifts and a tail foil that follows, so two different foils, but that's not what I see in the picture above.

DavidJohn

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Re: Interesting.
« Reply #2 on: July 09, 2017, 06:55:05 PM »

SURFFOILS

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Re: Interesting.
« Reply #3 on: July 09, 2017, 11:34:20 PM »
They would still need to set the front foil differently for minimal lift, like this guy.
« Last Edit: July 09, 2017, 11:40:28 PM by SURFFOILS »

PonoBill

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Re: Interesting.
« Reply #4 on: July 10, 2017, 09:23:18 AM »
Doesn't look worthwhile. If they took the stabilizer off both wings--or at least the front--it might make some sense
Foote 10'4X34", SIC 17.5 V1 hollow and an EPS one in Hood River. Foote 9'0" x 31", L41 8'8", 18' Speedboard, etc. etc.

pierreB

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Re: Interesting.
« Reply #5 on: July 12, 2017, 01:57:57 AM »

 


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