Wright R-1820 Cyclone

R-1820 Cyclone
R-1820 Cyclone
	Curtiss-Wright R-1820 Cyclone Radial Engine
Type	Radial engine
National origin	United States
Manufacturer	Wright Aeronautical
First run	1930s
Major applications	Boeing B-17 Flying Fortress; Curtiss P-36 Hawk; Douglas B-18 Bolo; Douglas DC-3; Douglas SBD Dauntless; General Motors FM-2 Wildcat; Sikorsky H-34; North American T-28 Trojan;
Number built	47,475
Developed into	Wright R-2600; Wright R-3350;
Variants	Shvetsov M-25

The Wright R-1820 Cyclone 9 is an American radial engine developed by Curtiss-Wright, widely used on aircraft in the 1930s through 1950s. It was produced under license in France as the Hispano-Suiza 9V or Hispano-Wright 9V, and in the Soviet Union as the Shvetsov M-25.