McDonnell XHJH Whirlaway was a 1940s American experimental twin-rotor helicopter designed and built by McDonnell Aircraft for the United States Navy. [1 ] It was the first successful twin-engined, twin rotor helicopter in the world. [2 ] The Whirlaway was the largest helicopter flown up to that time. [2 ] [3 ]
Design and development [ edit ]
In 1944, the United States Navy issued a requirement for a large rescue helicopter with capacity for ten occupants. The design was originally designated
XHJD-1; shortly after flying it was re-designated the XHJH-1. The XHJH-1 first flew in August 1944, and had twin side-by-side 46 ft (14 m) rotors at the end of pylon wings which turned in opposite directions. Each rotor was powered by a 450 hp (336 kW) Pratt & Whitney R-985 engine. [2 ]
Variants [ edit ]
Original United States Navy designation.
[1 ] XHJH-1
Designation changed before first flight.
Aircraft on display [ edit ]
The sole XHJH-1 is held by the
National Air and Space Museum.
Specifications [ edit ]
Data from [2 ]
Length: 32 ft 2 in (9.80 m)
Powerplant: 2 × Pratt & Whitney R-985 , 450 hp (340 kW) each
Main rotor diameter: 2× 46 ft 0 in (14.02 m)
Maximum speed: 120 mph (193 km/h; 104 kn)
Cruise speed: 90 mph (78 kn; 145 km/h)
Range: 300 mi (261 nmi; 483 km)
See also [ edit ]
References [ edit ]
Andrade, John (1979). U.S.Military Aircraft Designations and Serials since 1909. Midland Counties Publications. ISBN 0-904597-22-9.
External links [ edit ]
helicopter designations pre-1962
Helicopter, Trainer pre-1948
Helicopter, Trainer 1948-1962
Helicopter, Transport 1944-1962
Helicopter, Utility pre-1949
Helicopter, Utility 1950-1962