lso known as "The Flying Pulpit" or "the WASP", the Williams International X-Jet was a light-weight Vertical Take Off and Landing (VTOL) system that used a modified aircraft engine to power flight. This design allowed the user to take off and land with ease as well as being capable of moving at high speeds (up to 60 mph), hover and rotate on its axis. The X-Jet was also able to fly for around 45 minutes making it one of the most capable personal flight vehicles of its time.