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Grumman Boats Serial Number5/24/2023 ![]() Having an amphibious configuration also allowed the G-21 to go just about anywhere, and plans were made to market it as an amphibian airliner. ![]() The fuselage also proved versatile, as it provided generous interior space that allowed fitting for either a transport or luxury airliner role. First flight of the prototype took place on May 29, 1937. ![]() ![]() The deep fuselage served also as a hull and was equipped with hand-cranked retractable landing gear. It was powered by two 450 horsepower (340 kW) Pratt & Whitney R-985 Wasp Junior nine-cylinder, air-cooled, radial engines mounted on the leading edges of the wings. Grumman produced a high-wing monoplane of almost all-metal construction-the trailing half of the main wing and all of the flight control surfaces except for the flaps were fabric-covered. In response, the Grumman Model G-21 was designed as a light amphibious transport. Roland Harriman, approached Grumman and commissioned an aircraft that they could use to fly to New York City. In 1936, a group of wealthy residents of Long Island, including E. Preserved ex-British JRF-6B Goose in U.S.
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