# Wright Cyclone series > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Wright_Cyclone_series > Markdown URL: https://mediated.wiki/source/Wright_Cyclone_series.md > Source: https://en.wikipedia.org/wiki/Wright_Cyclone_series > Source revision: 1353788397 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) Radial piston plane engine series Wright Cyclone series R-1300, R-1820, R-2600 and R-3350 Type Radial engine series National origin United States Manufacturer Wright Aeronautical **Wright Cyclone** was the name given to a family of air-cooled [radial piston engines](/source/Radial_engine) designed by the [Wright Aeronautical Corporation](/source/Wright_Aeronautical_Corporation) and used in numerous [American](/source/United_States) aircraft in the 1930s, 1940s and 1950s. ## Background The [Wright Aeronautical Corporation](/source/Wright_Aeronautical_Corporation) was formed in 1919, initially to develop liquid-cooled [Hispano-Suiza V8](/source/Hispano-Suiza_8) engines under license.[1] In 1923 Wright purchased the [Lawrance Aero Engine Company](/source/Lawrance_Aero_Engine_Company), and [Charles Lawrance](/source/Charles_Lawrance) came to Wright as the Vice-President.[1] Later that year the [US Navy](/source/US_Navy) awarded Wright a contract to develop two new air-cooled radial engines. The first, called the P-1, was a 9-cylinder single row design of 1,652 cu in (27.07 L) displacement that was derived from an earlier Lawrence design, it produced 400 hp (300 kW).[2] The second, the P-2, had the same 1,652 cu in (27.07 L) displacement as the P-1, but was an improved design that produced 435 hp (324 kW).[2] Neither engine entered production, with the Navy selecting the superior [Pratt & Whitney R-1340 Wasp](/source/Pratt_%26_Whitney_R-1340_Wasp), so in 1926 work started on the improved 1,750 cu in (28.7 L) design, which became the R-1750 Cyclone.[3] ## Cyclone family **[R-1300 Cyclone 7](/source/Wright_R-1300_Cyclone_7)** (1942)[4][5] - 7-cylinder single row air cooled radial - Bore x stroke: 6+1⁄8 in × 6+5⁄16 in (156 mm × 160 mm) - Displacement: 1,301 cu in (21.32 L) - Power output: 800 hp (600 kW) **R-1750 Cyclone** (1926)[2][6][3] - 9-cylinder single row air cooled radial - Bore x stroke: 6 in × 6+7⁄8 in (152 mm × 175 mm) - Displacement: 1,750 cu in (28.7 L) - Power output: 500–525 hp (373–391 kW) **[R-1820 Cyclone](/source/Wright_R-1820_Cyclone)** (1932)[7][8][9] - 9-cylinder single row air cooled radial - Bore x stroke: 6+1⁄8 in × 6+7⁄8 in (156 mm × 175 mm) - Displacement: 1,823 cu in (29.87 L) - Power output: 575–1,525 hp (429–1,137 kW) **[R-2600 Cyclone 14 (Twin Cyclone)](/source/Wright_R-2600_Twin_Cyclone)** (1935)[10][11] - 14-cylinder two row air cooled radial - Bore x stroke: 6+1⁄8 in × 6+5⁄16 in (156 mm × 160 mm) - Displacement: 2,603 cu in (42.66 L) - Power output: 1,400–1,900 hp (1,000–1,400 kW) **[R-3350 Cyclone 18 (Duplex Cyclone)](/source/Wright_R-3350_Cyclone_18)** (1937)[10][12] - 18-cylinder two row air cooled radial - Bore x stroke: 6+1⁄8 in × 6+5⁄16 in (156 mm × 160 mm) - Displacement: 3,347 cu in (54.85 L) - Power output: 1,800–2,800 hp (1,300–2,100 kW) **[R-4090 Cyclone 22](/source/Wright_R-4090_Cyclone_22)**[13] - 22-cylinder two row air cooled radial - Bore x stroke: 6+1⁄8 in × 6+5⁄16 in (156 mm × 160 mm) - Displacement: 4,090 cu in (67.0 L) Note: the designations refer to the [engine configurations](/source/Engine_configuration) as follows: "R" = [Radial](/source/Radial_engine), followed by the approximate [displacement](/source/Engine_displacement) in [cubic inches](/source/Cubic_inch). ## See also - [Pratt & Whitney Wasp series](/source/Pratt_%26_Whitney_Wasp_series) – contemporary competing line of engines - [Wright Whirlwind series](/source/Wright_Whirlwind_series) – contemporary smaller displacement line of engines ## References ### Citations 1. ^ [***a***](#cite_ref-FOOTNOTEWhite1995319_1-0) [***b***](#cite_ref-FOOTNOTEWhite1995319_1-1) [White 1995](#CITEREFWhite1995), p. 319. 1. ^ [***a***](#cite_ref-FOOTNOTEGunston1986175_2-0) [***b***](#cite_ref-FOOTNOTEGunston1986175_2-1) [***c***](#cite_ref-FOOTNOTEGunston1986175_2-2) [Gunston 1986](#CITEREFGunston1986), p. 175. 1. ^ [***a***](#cite_ref-FOOTNOTEWhite1995324_3-0) [***b***](#cite_ref-FOOTNOTEWhite1995324_3-1) [White 1995](#CITEREFWhite1995), p. 324. 1. **[^](#cite_ref-FOOTNOTEGunston1986176_4-0)** [Gunston 1986](#CITEREFGunston1986), p. 176. 1. **[^](#cite_ref-FOOTNOTESmith1986129_5-0)** [Smith 1986](#CITEREFSmith1986), p. 129. 1. **[^](#cite_ref-FOOTNOTESmith1986125_6-0)** [Smith 1986](#CITEREFSmith1986), p. 125. 1. **[^](#cite_ref-FOOTNOTEGunston1986175–176_7-0)** [Gunston 1986](#CITEREFGunston1986), pp. 175–176. 1. **[^](#cite_ref-FOOTNOTESmith1986125–126_8-0)** [Smith 1986](#CITEREFSmith1986), pp. 125–126. 1. **[^](#cite_ref-FOOTNOTEWhite1995324–331_9-0)** [White 1995](#CITEREFWhite1995), pp. 324–331. 1. ^ [***a***](#cite_ref-FOOTNOTEGunston1986176–177_10-0) [***b***](#cite_ref-FOOTNOTEGunston1986176–177_10-1) [Gunston 1986](#CITEREFGunston1986), pp. 176–177. 1. **[^](#cite_ref-FOOTNOTEWhite1995341–346_11-0)** [White 1995](#CITEREFWhite1995), pp. 341–346. 1. **[^](#cite_ref-FOOTNOTEWhite1995356–365_12-0)** [White 1995](#CITEREFWhite1995), pp. 356–365. 1. **[^](#cite_ref-FOOTNOTEWhite200622_13-0)** [White 2006](#CITEREFWhite2006), p. 22. ### Bibliography - [Gunston, Bill](/source/Bill_Gunston) (1986). *World Encyclopedia of Aero Engines*. Wellingborough, Northamptonshire: Patrick Stephens Limited. [ISBN](/source/ISBN_(identifier)) [0-85059-717-X](https://en.wikipedia.org/wiki/Special:BookSources/0-85059-717-X). - Smith, Herschel (1986). *Aircraft Piston Engines: From the Manly Balzer to the Continental Tiara* (Corrected ed.). Manhattan, Kansas: Sunflower University Press. [ISBN](/source/ISBN_(identifier)) [0-07-058472-9](https://en.wikipedia.org/wiki/Special:BookSources/0-07-058472-9). - White, Graham (1995). *Allied Aircraft Piston Engines of World War II*. Warrendale, Pennsylvania: Society of Automotive Engineers, Inc. [ISBN](/source/ISBN_(identifier)) [1-56091-655-9](https://en.wikipedia.org/wiki/Special:BookSources/1-56091-655-9). - White, Graham (2006). *R-4360: Pratt & Whitney's Major Miracle*. North Branch, Minnesota: Specialty Press. [ISBN](/source/ISBN_(identifier)) [978-1-58007-097-3](https://en.wikipedia.org/wiki/Special:BookSources/978-1-58007-097-3). v t e Wright and Lawrance aircraft engines Wright inline engines E Gipsy L-320 T-1 Tornado T-2 Tornado T-3 Tornado T-4 Tornado V-720 IV-1460 IV-1560 V-1950 Lawrance radials A-3 C-2 J-1 J-2 L-1 L-2 L-3 L-4 L-5 Wright radials Whirlwind family J-3 J-4 J-5 J-6-5 J-6-7 J-6-9 R-540 R-760 R-790 R-975 R-1510 R-1670 Cyclone family Cyclone 7 Cyclone 9 Cyclone Twin Cyclone Duplex-Cyclone Cyclone 22 R-1300 R-1750 R-1820 R-2600 R-3350 R-4090 Others L-3 Gale R-1200 R-2160 Tornado Turbojets J59 J61 J65 J67 Turboprops/turboshafts T35 T49 Ramjets RJ47 RJ55 --- Adapted from the Wikipedia article [Wright Cyclone series](https://en.wikipedia.org/wiki/Wright_Cyclone_series) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Wright_Cyclone_series?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.