About the curves out of foam boards, I do not know if you are refering to the wings or the fuselage and if you are refering to bend foam board or to hot-wire cut it.
So, normally wings are made out of a block of foam, were you put one wing profile cut out of plywood or cardboard for ex, and the use nickel chrome wire to cut it.
If you intend to bend foam planks, 2 or 3 mm thick, you can use a heat gun, carefully, with just enough heat not to damage the foam. it will take time and patience.
both these techniques can be used on any airplane part.
Fly safe, be safe.