The X-Jet, developed by Williams International, is a small, light-weight Vertical Take Off and Landing (VTOL) system. It is powered by a modified Williams F107 turbofan aircraft engine. It can be be operated by and carry one person and is controlled by leaning in the direction of desired travel and adjusting the power. It can move in any direction, hover, accelerate rapidly, and rotate. It can fly for up to 45 minutes and travel at speeds up to 60 miles per hour (100 km/h). It was evaluated by the U.S. Army in the 1980s, which deemed it inferior to the abilities helicopters and small unmanned aircraft.Video exhibition at Wright-Patterson Air Force Base, Dayton, Ohio