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Post Info TOPIC: Grover Loening jet-propelled helicopter diagram


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Date: Jan 13, 2016
Grover Loening jet-propelled helicopter diagram
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Generic illustration of the "jet-propelled" helicopter principle by Grover Loening, chairman of NACA, in the early 1940s, as seen in Aviation Week, October 23, 1944:



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Brony rotorhead
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