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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]
Two-seat primary trainer biplane, powered by a 220 hp (160 kW) Wright R-790 Whirlwind (J-5) radial piston engine. 179 were built. XN3N-2 One prototype only (Bureau number 0265) powered by a 240 hp (180 kW) Wright R-760-96 Whirlwind (J-6-7) radial piston engine. XN3N-3 One production N3N-1 (0020) converted into a 'dash three' prototype. N3N-3
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.
The nine-cylinder version was originally known as the J-6 Whirlwind Nine, or J-6-9 for short. The U.S. government designated it as the R-975; Wright later adopted this and dropped the J-6 nomenclature. Like all the members of the J-6 Whirlwind family, the R-975 had larger cylinders than the R-790.