Rotorcraft XR-11

XR-11/XH-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]

Variants

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

Operators

United States

United States Air Force

Specifications

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)

References

Notes

1 2 3 4 Andrade 1979, p. 162
1 2 "American airplanes - Ro - Ry". www.aerofiles.com. 25 February 2009. Retrieved 2010-02-18.

Bibliography

Wikimedia Commons has media related to Rotorcraft XR-11.

Andrade, John (1979). U.S.Military Aircraft Designations and Serials since 1909. Midland Counties Publications. ISBN 0-904597-22-9.

United States helicopter designations, Army/Air Force and Tri-Service systems

Numerical sequence used by USAAC/USAAF/USAF 1941–present; US Army 1948–1956 and 1962–present; US Navy 1962–present

Main sequence
(1941–1962)

Prefix R-, 1941–1948	R-1 R-2 R-3 R-4 R-5 R-6 R-7 R-8 R-9 R-10 R-11 R-12 R-13 R-14 R-15 R-16

Prefix H-, 1948–1962	H-5 H-6 H-9 H-10 H-11 H-12 H-13/J H-15 H-16 H-17 H-18 H-19 H-20 H-21 H-22 H-23 H-24 H-25 H-26 H-27 H-28 H-29 H-30 H-31 H-32 H-33 H-34 H-35 H-36¹ H-37 H-38¹ H-39 H-40 H-41 H-42 H-43 H-44¹ H-45¹

Main joint sequence
(1962–present)

1962 redesignations	OH-13/UH-13J UH-19 CH-21 OH-23 UH-25 CH-34 CH-37 HH-43

New designations	CH-46/HH-46/UH-46 CH-47 UH-48 XH-49 QH-50 XH-51 HH-52 CH-53/HH-53/MH-53/CH-53E/CH-53K CH-54 TH-55 AH-56 TH-57 OH-58 XH-59 UH-60/SH-60/HH-60/HH-60J YUH-61 XCH-62 YAH-63 AH-64 HH-65 RAH-66 TH-67 MH-68 H-69¹ ARH-70 VH-71 UH-72 H-73 to H-89¹ MH-90 H-91¹ VH-92

1962 redesignations
reusing old numbers

¹ Not assigned

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