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

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