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McDonnell Aircraft XH-20 Little Henry

Sponsored by the U.S. Army Air Forces/U.S. Air Force, the McDonnell XH-20 Little Henry proved that helicopters could fly using ramjets located in the tips of their rotor blades.
The XH-20 was a low-cost research prototype employing open-frame, steel-tube construction. The tip-driven rotor eliminated the need for a torque-compensating tail rotor. It did not need a transmission and was controlled with a rudder.
Little Henry was not a success because ramjets were too noisy and used too much fuel, so only two test models were built. One of the XH-20s is on display at the National Museum of the U.S. Air Force at Wright-Patterson Air Force Base, Ohio. 
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Unique identifier BI45022 
Boeing ID BIV15_XH-20_01 
Type Video 
Duration 22s 
Size 720px × 480px   8MB 
License type RM 
Keywords
1940s
adults
automobiles
day
flight test livery
flight testing
full body views
ground shots
historic production status
hovering
left side views
male
one of a kind aircraft
out of production
perspective lines
research/experimental
rotorcraft blades
takeoffs
test pilots