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mcrt said..
I cannot post links but if you search Youtube for Brucecreations Channel or kitesurfing box wing you will find them.
Basically it is a biplane foil design where the tips of upper/lower foils join together in an endplate,forming a "box".Also known as Infinity Wings in aeronautics.
In one vid (Youtube "Hydrofoil Kitesurfing Box Wing" ) he comments that they rise earlier than single foils, at minute 2:30 he tries to broach the foil a couple times but it only cavitates the top foil and comes down gently...
This vids are 5 years old, i am kind of surprised that no big manufacturer has R&D something like this...half the wingspan,safer in a crash, no violent breaching...
Or maybe they have and they just did not work for some reason?.
Most recent video from this guy is april this year.
worth watching just for the craftsmanship