I'm curious, why isn't an ultralight made from composites? If you wanted it light weight couldn't you just make it thin, like a 1" wide fuselage. Like say you build this big flat table. You buy some 4 x8 sheets of foam and lay them flat. Cut it to shape, and lay the glass. The fin is part of the fuselage and runs all the way up to the motor mount.
Once you have this big flat section you can then add the H Stab, the stub wings, and some bump outs for a seat. The Sonex and RV landing gear gets built in to the engine mount. You basically straddle it like a motorcycle.
All the controls for the empennage are exterior mounted and visible.
I'm the furthest thing from a designer but it makes sense in my head. It seems to me the fuselage doesn't need to be wide. The wings are held in by two cams in the seat area and when turned counter clockwise the wings slide out for storage.
Once you have this big flat section you can then add the H Stab, the stub wings, and some bump outs for a seat. The Sonex and RV landing gear gets built in to the engine mount. You basically straddle it like a motorcycle.
All the controls for the empennage are exterior mounted and visible.
I'm the furthest thing from a designer but it makes sense in my head. It seems to me the fuselage doesn't need to be wide. The wings are held in by two cams in the seat area and when turned counter clockwise the wings slide out for storage.
