I think using windsurf board fins and surf board fins are good ideasC A R A F I N O 2014 wrote:To be very honest, it is not easy. there is a lot involved. but you can take two windsurf board fins. laminate them together base to base. make is strong. drill holes to attach to your strut. that will be your front wing. do the same for the rear wings. smaller surf board fins. as for the strut. well that one is not easy. but to have money, use something like plastic and cut it in a cnc. hard plastic.
cnc machines are not cheap so if you can shape it by hand your feel tired but still have your cash.
After that, put it together, mount to the board, try it.
And a lot of possibilities, when the right adapter is designed to swap foils on the fuselage
Meanwhile there is a link with pictures of all popular hydrofoil makers: