build techniques

Hello there! Today I bought a secondhand plane (a Baby Blender with longer wings) because of the price and the electronics. I'm thinking in designing my own RC Plane. It's also a biplane (Polikarpov I-15) and it will have aproximately the same size, so I guess it the motor will handle the...

Has the question ever been asked about the reason for most if not all of the wing builds using foam board utilize the method of creasing and sharp angle bending the foam over the spar as opposed to the use of wing ribs? Other than the obvious answer of simplicity and ease of build, I am at a...