The Wright R-975 Whirlwind was a series of nine-cylinder, air-cooled radial aircraft engines built by the Wright Aeronautical division of Curtiss-Wright. These engines had a displacement of about 975 cu in (15.98 L), and power ratings ranging from 300 hp (220 kW) to 550 hp (410 kW), depending on variant and rating basis.
The Wright R-975 Whirlwind was a series of nine-cylinder, air-cooled radial aircraft engines built by the Wright Aeronautical division of Curtiss-Wright. These engines had a displacement of about 975 cu in (15.98 L), and power ratings ranging from 300 hp (220 kW) to 550 hp (410 kW), depending on variant and rating basis.
Source: Wikipedia "Wright R-975 Whirlwind" · CC BY-SA 4.0
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