5. 1933 Fuller Dymaxion
Designed by R. Buckminster Fuller, the Fuller Dymaxion was initially conceived as a flying machine. The plan was to install jet engines and inflatable wings, so you could drive it like a car and then inflate the wings and fly away when you want a plane. The wings never became a part of the production model, and without them the Dymaxion looked like a goofy pill rolling down the road. The Dymaxion was a three-wheel vehicle, with a levered A-arm carrying the rear wheel, which swiveled like the tail of an airplane. The first model had a terrible wobble from the rear wheel, the next two built were bigger and heavier, while the third model had a stabilizer fin on the roof. A fatal accident involving the Dymaxion ( due to unknown causes) killed the vehicles chances of public acceptance.