If you're looking for more planes based on real aircraft to create, the Messerschmitt models that were never flown would be awesome. There's quite a few of them, and each is pretty unique and would be fun to make. I'm sure a lot of people would download them, and it would keep you busy for a while, there's at least 9 different prototypes, including a tailless aircraft. I know this isn't related to the plane above, but just a suggestion. The Wikipedia article on Messerschmitt has a list of the aircraft they built and designed, and you can find them in the very last section of the list.
If you're looking for more planes based on real aircraft to create, the Messerschmitt models that were never flown would be awesome. There's quite a few of them, and each is pretty unique and would be fun to make. I'm sure a lot of people would download them, and it would keep you busy for a while, there's at least 9 different prototypes, including a tailless aircraft. I know this isn't related to the plane above, but just a suggestion. The Wikipedia article on Messerschmitt has a list of the aircraft they built and designed, and you can find them in the very last section of the list.