Charles M. Manly
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Manly helped Smithsonian Institution Secretary Samuel Pierpont Langley build The Great Aerodrome, which was intended to be a manned, powered, winged flying machine. Manly made major contributions to the development of the aircraft's revolutionary 52 hp gasoline-fueled radial engine, called the Manly-Balzer engine. Manly attempted to pilot the Aerodrome in its only two tests, October and December 1903. The machine failed to fly both times, plunging into the Potomac River after its launch from a houseboat. Manly was rescued unhurt, although he was briefly trapped underwater after the second test.
In 1919 he was president of the Society of Automotive Engineers (now SAE International). Following his tenure he did additional engineering research on engines. The Manly Memorial Medal is an annual award given by SAE for the best paper on aeronautical power plants.
- "Charles M. Manly Papers, 1895-1925 (bulk 1903-1915)". National Air and Space Museum Archives. Smithsonian Institution. 2012. Retrieved 20 March 2013.
- Veal, C. B. (April 1939). "Manley, The Engineer". SAE (Society of Automotive Engineers) Journal: 145–153.
- Charles M. Manly: An Early American Innovator in Aircraft Engines
- Setright, L J K (1971). The Power To Fly. George Allen & Unwin. pp. 19–24. ISBN 0-04-338041-7.