It's interesting that they have designed this rig with J-foils. Sam Bradfield built a 20 foot J-foiler in the 1980s before carbon fiber, but it was a bit heavy and the solid wing was apparently a nuisance: Sam then changed to T-foils.
Dacarls:
A-class USA 196, USA 21, H18, H16
"Nothing that's any good works by itself. You got to make the damn thing work"- Thomas Edison
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