I have some excellent modern foam core lifting hydrofoil NACA shapes 36 inches long that were cut by a model airplane foam-cutter in California. He shipped them to me covered with light model airplane fiberglass cloth/epoxy. The trailing edges are thin and hollow as described.
These hydrofoil shapes were not tapered: IMHO this aspect could be a nuisance- best done by expert wing cutters.
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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