The McDonnell Model 38 was a lightweight experimental helicopter sponsored by the United States Army Air Force to test the concept of using small ramjets at the tips of the rotor blades.[1] As a functional helicopter it was a simple open-frame steel-tube construction.[1] Allotted the military designation XH-20 the first of two first flew on the 29 August 1947.[1]
Although the XH-20 flew successfully the ramjets were noisy and burnt a large amount of fuel and plans to build a larger two-seat XH-29 were abandoned.
Variantsedit
Data from: U.S.Military Aircraft Designations and Serials since 1909[2]
Media related to McDonnell XH-20 at Wikimedia Commons
^ abcde. Boeing. Archived from the original on 2009-12-17. Retrieved 2009-12-20.
^Andrade, John (1979). U.S.Military Aircraft Designations and Serials since 1909. Midland Counties Publications. pp. 119–121. ISBN0-904597-22-9.
^"McDonnell Model Numbers" (PDF). McDonnell Douglas. July 1, 1974. Retrieved September 3, 2023.
May 11, 2024
mcdonnell, little, henry, 1940s, american, experimental, lightweight, helicopter, designed, built, mcdonnell, aircraft, little, henry, role, experimental, ramjet, rotor, powered, helicopter, national, origin, united, states, manufacturer, mcdonnell, aircraft, . The McDonnell XH 20 Little Henry was a 1940s American experimental lightweight helicopter designed and built by McDonnell Aircraft 1 XH 20 Little Henry Role Experimental ramjet rotor powered helicopter National origin United States Manufacturer McDonnell Aircraft First flight 29 August 1947 Primary user United States Air Force Number built 2 Contents 1 Development 2 Variants 3 Operator 4 Aircraft on display 5 Specifications 6 See also 7 ReferencesDevelopment editThe McDonnell Model 38 was a lightweight experimental helicopter sponsored by the United States Army Air Force to test the concept of using small ramjets at the tips of the rotor blades 1 As a functional helicopter it was a simple open frame steel tube construction 1 Allotted the military designation XH 20 the first of two first flew on the 29 August 1947 1 Although the XH 20 flew successfully the ramjets were noisy and burnt a large amount of fuel and plans to build a larger two seat XH 29 were abandoned Variants editData from U S Military Aircraft Designations and Serials since 1909 2 Model 38 XH 20 Little Henry experimental lightweight helicopter two built Model 79 XH 29 Big Henry proposed two seat ramjet powered development canceled 3 Operator edit nbsp United States United States Air ForceAircraft on display edit nbsp XH 20 at the NMUSAF 46 689 the first XH 20 is on display at the National Museum of the United States Air ForceSpecifications editData from 1 General characteristicsCrew 1 Length 12 ft 6 in 3 81 m Height 6 ft 8 in 2 03 m Empty weight 290 lb 132 kg Powerplant 2 McDonnell Ramjets Main rotor diameter 20 ft 6 1 m Performance Maximum speed 50 mph 80 km h 43 kn See also editAircraft of comparable role configuration and era Fairey Ultra light Helicopter Hiller YH 32 Hornet Sud Ouest Djinn Related lists List of military aircraft of the United StatesReferences edit nbsp Media related to McDonnell XH 20 at Wikimedia Commons a b c d e XH 20 Little Henry Research Helicopter Boeing Archived from the original on 2009 12 17 Retrieved 2009 12 20 Andrade John 1979 U S Military Aircraft Designations and Serials since 1909 Midland Counties Publications pp 119 121 ISBN 0 904597 22 9 McDonnell Model Numbers PDF McDonnell Douglas July 1 1974 Retrieved September 3 2023 Retrieved from https en wikipedia org w index php title McDonnell XH 20 Little Henry amp oldid 1173674320, wikipedia, wiki, book, books, library,
