Williams X-Jet

For the aircraft used by the X-Men, see Blackbird (comics).

One of the three original proof-of-concept prototypes of the Williams X-Jet, on display at the Seattle Museum of Flight.

X-Jet viewed from the side.

The Williams X-Jet, created by Williams International, was a small, light-weight Vertical Take Off and Landing (VTOL) system powered by a modified Williams F107 turbofan aircraft engine. This vehicle was nicknamed "The Flying Pulpit". It was designed to be operated by and carry one person and controlled by leaning in the direction of desired travel and adjusting the power. It could move in any direction, accelerate rapidly, hover, and rotate on its axis, staying aloft for up to 45 minutes and traveling at speeds up to 60 miles per hour (100 km/h). It was evaluated by the U.S. Army in the 1980s, and was deemed inferior to the capabilities of helicopters and small unmanned aircraft.

Other VTOL systems developed by Williams International included a jet-powered flying belt developed in 1969, which was powered by a Williams WR19 turbofan, and the WASP (Williams Aerial Systems Platform) developed in the 1970s, which was powered by the more powerful WR19-9.

Specifications (X-Jet)

General characteristics

• Crew: One pilot
• Length: ft (m)
• Wingspan: ft (m)
• Height: 4 ft 0 in (1.22 m)

• Footprint: 4 ft² (0.4 m²))

• Wing area: ft² (m²)
• Empty weight: 401 lb (182 kg)
• Loaded weight: 550 lb (250 kg)
• Max. takeoff weight: lb (kg)
• Powerplant: 1 × modified Williams F107 turbofan, 600 lbf (2.7 kN)

Performance

• Maximum speed: 60 mph (96 km/h)
• Range: endurance of 30-45 minutes ()
• Service ceiling: 10,000 ft (3,049 m)
• Rate of climb: ft/min (m/s)
• Wing loading: lb/ft² (kg/m²)
• Thrust/weight: 1.11

US PATENT NUMBER 4,447,024 for this Airborne Vehicle and Technical Information and Drawings is available at the UP Patent office.

References

• Display information at Museum of Flight in Seattle, Washington.
• Guardian article
• nationalmuseum.af.mil

See also

Aircraft of comparable role, configuration and era

• VZ-1 Pawnee