Aircraft engines, considered unreliable during the first 20 years of aviation due to their need for liquid-cooling, heavy weight and other inconsistencies, were given a revolutionary boost with the development of Pratt & Whitney’s R-1340 Wasp Radial Engine in 1925.
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Image Credit: Courtesy Flickr/nostri-imago (CC BY 2.0)Image Caption: Pratt & Whitney Wasp A, R-1300 (R-1340)
2015
Bradley Intl. AirportWindsor LocksState: CTZip: 06096Country: USAWebsite: http://www.asme.org/about-asme/history/landmarks/topics-a-l/air-and-space-transportation/-149-hydromatic-propeller-%28ca--1938%29, http://files.asme.org/ASMEORG/Communities/History/Landmarks/5572.pdfCreator: Hamilton Standard
Rapid development of aircraft design in the 1930s required many related innovations, including propeller design. The hydromatic propeller by Hamilton Standard marked a significant advance over the counterweight-type, controllable pitch propeller. The first test flight of the prototype took place in 1938: the public demonstration was made by a United Air Lines DC-3 over New York City on April 6, 1938. It played a distinguished role in allied combat aircraft in World War II.
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Image Credit: Courtesy ASMEImage Caption: An early example of propeller innovations, including variable-pitch control and feathering capability.Era_date_from: 1938
1990