The Starship
The Starship was expected to be a high-functioning groundbreaking aircraft, but it missed the mark. It had a carbon-composite construction and turboprop engines, which made engineers believe it would run perfectly, but it was very slow and difficult to fly and cost an arm and a leg to maintain. 53 of these planes were built and ready to fly in 1989, but only a few were actually sold.
The Starship
The Hiller VZ-1
This aircraft must have been quite impressive on paper because it was anything other than impressive to actually fly. There were no gears- the idea of the plane was that the pilot should steer the aircraft by shifting his body weight. Everyone loved it until they actually saw it in flight. It only traveled up to 16 MPH and steering was much more complicated than they anticipated it to be.
The Hiller VZ-1