1925Pratt & Whitney Aircraft Company is founded by Frederick B. Rentschler in Hartford, Conn., as a partially owned subsidiary of the Pratt & Whitney Company, a toolmaker.
1925The experts say airplane engines should be liquid-cooled, but Pratt & Whitney founder, Frederick B. Rentschler, questions that and finds a better way. Pratt & Whitney builds the Wasp—a lighter, air-cooled engine that revolutionizes the aircraft industry.
1927The world becomes a much smaller place when William Boeing installs Pratt & Whitney’s new Wasp engines in his Model 40A mail planes, boosting power and reducing weight—allowing the planes to carry passengers as well as mail.
1929Pratt & Whitney becomes part of United Aircraft & Transport Corporation, which includes such industry leaders as Boeing, Chance Vought, Sikorsky, Hamilton Standard, and a group of carriers that would become United Airlines.
1929Pratt & Whitney crosses the Connecticut River, from Capitol Avenue in Hartford to a new home in East Hartford.