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. It was derived from the single-engined, twin rotor Platt-LePage XR-1. James McDonnell had invested in that company in 1942 and some of his engineers had been working there, gaining experience of helicopter design and production techniques. McDonnell took control of the company in June 1944.[4] The XHJH-1 first flew two months later. It 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-AN-14B Wasp Junior engine.[2]
^. Boeing. Archived from the original on 2007-07-07. Retrieved 2007-07-07.
^ abcFrancillon, René J. (1990). McDonnell Douglas aircraft since 1920 Vol.2 (2nd ed.). London: Putnam. pp. 69–72. ISBN978-0851778280.
^"McDonnell XHJD-1 Whirlaway". National Air and Space Museum. Smithsonian Institution. Retrieved 12 August 2019.
^Bridgman, Leonard, ed. (1949). Jane's All the World's Aircraft 1949-50. London: Sampson Low, Marston & Co. p. 248c.
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McDonnell XHJD-1 Whirlaway in NASM Collection 2010-04-08 at the Wayback Machine
May 11, 2024
mcdonnell, xhjh, whirlaway, mcdonnell, model, 1940s, american, experimental, transverse, rotor, helicopter, designed, built, mcdonnell, aircraft, corporation, united, states, navy, largest, helicopter, time, well, first, successful, twin, engined, twin, rotor,. The McDonnell XHJH Whirlaway aka McDonnell Model 37 was a 1940s American experimental transverse rotor helicopter designed and built by McDonnell Aircraft Corporation for the United States Navy and was the largest helicopter at the time as well as the first successful twin engined twin rotor helicopter in the world 1 2 3 4 XHJH Whirlaway Role Experimental twin rotor helicopter National origin United States Manufacturer McDonnell Aircraft Corporation First flight 27 April 1946 Number built 1 Contents 1 Design and development 2 Variants 3 Aircraft on display 4 Specifications 5 See also 6 References 7 External linksDesign and development editIn 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 It was derived from the single engined twin rotor Platt LePage XR 1 James McDonnell had invested in that company in 1942 and some of his engineers had been working there gaining experience of helicopter design and production techniques McDonnell took control of the company in June 1944 4 The XHJH 1 first flew two months later It 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 amp Whitney R 985 AN 14B Wasp Junior engine 2 Variants editXHJD 1 Original United States Navy designation 1 XHJH 1 Designation changed before first flight 1 Aircraft on display editThe sole XHJH 1 is held by the National Air and Space Museum 5 Specifications editData from Aerofiles McDonnell 2 Jane s All the World s Aircraft 1949 50 6 McDonnell Douglas aircraft since 1920 Vol 2 4 General characteristicsCrew 1 Capacity 1 9 pax Length 32 ft 2 in 9 80 m Wingspan 41 ft 12 m between rotor centres Width 87 ft 27 m overall with rotors turning Gross weight 11 000 lb 4 990 kg Powerplant 2 Pratt amp Whitney R 985 AN 14B Wasp Junior 9 cylinder air cooled radial piston engines 450 hp 340 kW each Main rotor diameter 2 46 50 ft 14 15 m Main rotor area 3 324 sq ft 308 8 m2 rotors of varying diameter fitted for testing Performance Maximum speed 120 mph 190 km h 100 kn at 5 000 ft 1 524 m Cruise speed 90 mph 140 km h 78 kn Range 300 mi 480 km 260 nmi Service ceiling 12 900 ft 3 900 m absolute Rate of climb 1 300 ft min 6 6 m s Disk loading 2 8 3 3 lb sq ft 14 16 kg m2 dependent on rotors fitted Power mass 0 082 hp lb 0 135 kW kg See also editAircraft of comparable role configuration and era Bratukhin Omega Focke Achgelis Fa 223 Focke Wulf Fw 61 Related lists List of rotorcraftReferences edit a b c Andrade John 1979 U S Military Aircraft Designations and Serials since 1909 Midland Counties Publications p 194 ISBN 0 904597 22 9 a b c American airplanes McDonnell www aerofiles com 25 March 2008 Retrieved 2010 02 16 The War Years 1939 1945 Boeing Archived from the original on 2007 07 07 Retrieved 2007 07 07 a b c Francillon Rene J 1990 McDonnell Douglas aircraft since 1920 Vol 2 2nd ed London Putnam pp 69 72 ISBN 978 0851778280 McDonnell XHJD 1 Whirlaway National Air and Space Museum Smithsonian Institution Retrieved 12 August 2019 Bridgman Leonard ed 1949 Jane s All the World s Aircraft 1949 50 London Sampson Low Marston amp Co p 248c External links edit nbsp Wikimedia Commons has media related to McDonnell XHJH Whirlaway McDonnell XHJD 1 Whirlaway in NASM Collection Archived 2010 04 08 at the Wayback Machine Retrieved from https en wikipedia org w index php title McDonnell XHJH Whirlaway amp oldid 1184505367, wikipedia, wiki, book, books, library,
