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The Wright R-790 Whirlwind was a series of nine-cylinder air-cooled radial aircraft engines built by Wright Aeronautical Corporation, with a total displacement of about 790 cubic inches (12.9 L) and around 200 horsepower (150 kW). These engines were the earliest members of the Wright Whirlwind engine family.
Wright's J-1 was the first engine in its nine-cylinder R-790 Whirlwind series and was quickly followed by the J-3, J-4, J-4A, J-4B, and finally the popular and successful J-5 of 1925. In 1928, Wright replaced the R-790 series with the J-6 Whirlwind family, in which a supercharger was added to boost engine power and the cylinders were enlarged ...
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Wright Aeronautical (1919–1929) was an American aircraft manufacturer headquartered in Paterson, New Jersey. [1] It was the successor corporation to Wright-Martin. [1] It built aircraft and was a supplier of aircraft engines to other builders in the golden age of aviation. [1]
In 1929 one clipped-wing Phaeton was tested as a racer, then fitted with 200–220 hp (150–160 kW) nine cylinder R-790 Whirlwind engine. Piloted by Jack Foster, this competed in the 1930 National Air Races, resulting in the sale of another 24 similarly-powered, though full span, Phaetons. [3] American Eagle ceased trading in 1932. [4]
The seven-cylinder version was originally known as the J-6 Whirlwind Seven, or J-6-7 for short. The U.S. government designated it as the R-760; Wright later adopted this and dropped the J-6 nomenclature. Like all the members of the J-6 Whirlwind family, the R-760 had larger cylinders than the R-790.
Powerplant: 1 × Wright R-760-2 Whirlwind radial , 235 hp (175 kW) Performance. Maximum speed: 126 mph (203 km/h, 109 kn) Range: 470 mi (756 km, 410 nmi) Service ceiling: 15,200 ft (4,635 m) Rate of climb: 900 ft/min (4.6 m/s) Communications were done by the instructor through a speaking tube to the student in the front cockpit. Communications ...