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Rotorcraft XR-11

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Title: Rotorcraft XR-11  
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Subject: Firestone XR-14, Firestone XR-9, Kellett XR-8, Seibel S-4, McCulloch MC-4
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Rotorcraft XR-11

Role Twin-rotor helicopter
National origin United States
Manufacturer Rotorcraft Corporation
Designer Gilbert Magill
First flight 1947
Status Cancelled
Primary user U.S. Army Air Force
Number built 1

The Rotorcraft XR-11, known by the company as the X-2 Dragonfly, was an American two-seat lightweight helicopter built in the 1940s for evaluation by the United States Air Force by the Rotorcraft Corporation of Glendale, California.[1][2]

Design and development

The XR-11 was a powered by a 100 hp (75 kW) Continental A100 piston engine driving two three-bladed contra-rotating rotors.[1] Only one was built and first flown in 1947, it was re-designated the XH-11 in 1948, the project was later cancelled.[1][2]


United States Air Force designation later changed to XH-11, one built.[1]


 United States


General characteristics

  • Crew: 2
  • Length: 15 ft 0 in (4.57 m)
  • Height: 7 ft 6 in (2.29 m)
  • Empty weight: 899 lb (408 kg)
  • Max takeoff weight: 1,349 lb (612 kg)
  • Powerplant: 1 × Continental A100 , 100 hp (75 kW)
  • Main rotor diameter: 2× 18 ft 0 in (5.49 m)

See also

Related lists



  1. ^ a b c d Andrade 1979, p. 162
  2. ^ a b "American airplanes - Ro - Ry". 25 February 2009. Retrieved 2010-02-18. 


  • Andrade, John (1979). U.S.Military Aircraft Designations and Serials since 1909. Midland Counties Publications.  
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