Just starting toying with a USV based upon a wingsail design.

Based upon hint I found that NACA 4 point is a good start. Especially NACA 00018.

Only just starting out.

It is 120mm cord and sections 100mm in height.

A 16mm OD carbon fibre tube will be used as "mast" (and to provide a means to rotate).

5mm OD carbon fibre tube for booms.

Size, of course, dictated by print volume of my Flashforge Finder.

Sail can then be in increments of 100mm.

So, I am still working on this as I said. But, since people are already downloading I added a boom lock to the foil with boom socket. So there is an option to glue the boom in or lock it in with a 3M nut/bolt.