If our airplane had a gross weight of 3000 pounds the main hydrofoils would
have to have ten times the area of these hydro foils
to get the same height at 35 MPH.

Lets say they are now 8" by 4" or 32 square inches.
320 square inches divided by a span of 24 inches
would give a cord of 13.5 inches. Quite doable.

When landing the hydro foil  impact should be less as the foil will
initially tend to sink while still lifting  and mitigate the impact to the hull.

The so called Kite's are really wings with high pressure inflated spars and ribs.
They are quite capable of tacking up wind.

Here is a video. I'll try to get a better one in a few days.

Paul Lamar

Thanks, Paul. I knew that there had been military research into foil landing gear back in the '60s so googled to see if anything recent. Came up with this: https://www.toysforbigboys.com/water-toys/lisa-akoya/This <https://www.toysforbigboys.com/water-toys/lisa-akoya/This> was the only site I could find with footage of Lisa Akoya water operations.The cat configuration has a president in the S.55: https://en.m.wikipedia.org/wiki/Savoia-Marchetti_S.55 <https://en.m.wikipedia.org/wiki/Savoia-Marchetti_S.55>. Beautiful craft.

I'm sure you're aware of all this. Just trying to prolong the discussion of your very interesting design. :)Thanks, again. Boyd

Yes I knew about the Savoia-Marchetti_S.55
A whole squadron of them flew to the US in the 1930's from Italy

The other Italian flying boat I was thinking off was the Piaggio PI36.
A gull wing with two engines.

Paul Lamar

https://www.youtube.com/watch?v=zQ2sSRBMPqs

The US Navy did this years ago- this is what happens when Boeing builds a boat!

Kevin Alderman
A&P, GROL, ASEL, AMEL
CFI,Comm/Inst
100 ton Master
CDL Driver


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