Sikorsky X2

The Sikorsky X2 is an experimental compound helicopter with coaxial rotors developed by the American aircraft manufacturer Sikorsky Aircraft. It is considered to be the fastest helicopter ever produced. 

On 15 September 2010, test pilot Kevin Bredenbeck achieved Sikorsky's design goal for the X2 when he flew it at a speed of 250 knots (290 mph; 460 km/h) in level flight, an unofficial speed record for a helicopter. The demonstrator also reached a speed of 260 knots (300 mph; 480 km/h) in a shallow 2˚ to 3˚ dive, slightly less than the 303 mph of the XH-59A

General characteristics

• Crew: 2
• Length: not available ()
• Rotor diameter: 26.4 ft (8.05 m)
• Height: not available ()
• Disc area: 548 ft² (50.9 m²)
• Empty weight: lb (kg)
• Max. takeoff weight: 7,937 lb (3,600 kg)
• Powerplant: 1 × LHTEC T800-LHT-801 turboshaft, 1300–1800 shp (1000–1340 kW)
• Propellers: 1 six-bladed pusher-type propeller
• Rotor configuration: 2 four-bladed co-axial

Performance

• Maximum speed: 260 knots (299 mph, 481 km/h)
• Cruise speed: 250 knots (287.5 mph, 460 km/h)
• Range: 702 nmi (808 mi, 1300 km)
• Service ceiling: ft (m)
• Rate of climb: ft/min (m/s)