I am Andreas and I want to build an efoil with the slingshot windsurf foil fwind 1 (we have one).
For the first tests, the windsurf foilboard slingshot dialer 130l will be used, then it is planed to switch to a DIY board with integrated electronic box etc.
The propulsion system will be near the one of pacificmeister.
So I decided to make the gearbox by myself, it is planed with a ratio of 4,5:1.
The gears and the aluminium is ordered, the work in the CAD done,
so the production of the prototype will be started soon.