Tooling, Pass Type and Production method for Composite Hydrofoil

[dachopper]

Cheers, we would use foam for ease of machining, but can't get any here, and it's $$ to import.
Making the bit under the water, not the board :)
https://youtu.be/hP4AcEQYi5w

[Boyan Silyavski]

Its a building insulation foam available anywhere?? for 120x60x4cm for example here in Spain for 4 euro at any construction shop. Up to 100mm thick. No super duper foam. this for the test shape pieces. can be glued together to form thicker pieces. Check local lettering companies. big letters for shops and restaurants are made from better variant of this foam.

[dachopper]

I live in a desert, they have no foam whatsoever anywhere and the Marine ply - or importing G10 is about my only options.

Anyone on here who has cut plywood care to comment?

[komatias]

I live in a desert, they have no foam whatsoever anywhere and the Marine ply - or importing G10 is about my only options.

Anyone on here who has cut plywood care to comment?

How about making your own foam using the expanding polyurethane stuff used to keep door frames in place while building?

[dachopper]

I have used that stuff when I made my first board, it's not rigid enough. The core needs to be rigid like solid wood plastic metal or composite