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- Frank Walker Caldwell (1889–1974) was a leading American propeller engineer and designer. As the United States government's chief propeller engineer (1917–1928), he pioneered propeller engineering and propeller testing facilities and techniques. Working at Hamilton Standard Propeller Corporation, they won the 1933 Collier Trophy for his work on the controllable-pitch propeller. After 25 years of service, he retired in 1955 as director of the United Aircraft Corporation Research Division. (en)
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- 19703 (xsd:nonNegativeInteger)
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- Lookout Mountain, Tennessee, U.S. (en)
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- Frank W. Caldwell being congratulated on winning the 1933 Collier Trophy for his work with Hamilton Standard on the controllable-pitch propeller. (en)
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- (en)
- Frank W. A. Caldwell (en)
- Walter H. Caldwell (en)
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- West Hartford, Connecticut, U.S. (en)
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- Mechanical engineering (en)
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- Aircraft propeller engineer (en)
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- Frank Hollis Caldwell (en)
- Mary Ellis Nellie Walker (en)
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- Gertrude Sweigert Heisel (en)
- Majorie Snodgrass (en)
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- Frank Walker Caldwell (1889–1974) was a leading American propeller engineer and designer. As the United States government's chief propeller engineer (1917–1928), he pioneered propeller engineering and propeller testing facilities and techniques. Working at Hamilton Standard Propeller Corporation, they won the 1933 Collier Trophy for his work on the controllable-pitch propeller. After 25 years of service, he retired in 1955 as director of the United Aircraft Corporation Research Division. (en)
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