Charles M. Manly
Charles Matthews Manly (1876–1927) was an American engineer.
Charles M. Manly
|Born||April 26, 1876|
Staunton, Virginia, US
|Died||October 16, 1927 (aged 51)|
Brooklyn, New York, US
|Alma mater||Cornell University|
|Known for||Langley Aerodrome|
|Spouse(s)||Grace Agnes Wishart (1877–1921) (her death)|
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 named 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.
Manly married his wife Grace Agnes Wishart Manly (1877–1921) in 1904. He died at Kew Gardens, Brooklyn, NY on October 16, 1927, leaving two sons, Charles and John. 
- "Manly Medal Established" (PDF). CORNELL ALUMNI NEWS. Corning, NY. 1928-10-18. p. 42. Retrieved 2021-07-25.
- "C.M. Manly dies; Aviation Pioneer". Brooklyn Daily Eagle. Brooklyn, NY. 1927-10-18.
- Veal, C. B. (April 1939). "Manley, The Engineer". SAE (Society of Automotive Engineers) Journal: 145–153.
- Setright, L J K (1971). The Power To Fly. George Allen & Unwin. pp. 19–24. ISBN 0-04-338041-7.
- "Charles M. Manly Papers, 1895-1925 (bulk 1903-1915)". National Air and Space Museum Archives. Smithsonian Institution. 2012. Retrieved 20 March 2013.
- Charles M. Manly: An Early American Innovator in Aircraft Engines
- Charles M. Manly at Find a Grave