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Wright R-2600 Twin Cyclone

January 01, 1970

The Wright R-2600 Cyclone 14 (also called Twin Cyclone) is an American radial engine developed by Curtiss-Wright and widely used in aircraft in the 1930s and 1940s.

R-2600
Wright R-2600 Cyclone radial engine
Type Radial engine
National origin United States
Manufacturer Wright Aeronautical
First run 1935
Major applications
Number built 85,374[1]
Developed from Wright R-1820

History edit

In 1935, Curtiss-Wright began work on a more powerful version of their successful R-1820 Cyclone 9. The result was the R-2600 Twin Cyclone, with 14 cylinders arranged in two rows. The 1,600 hp (1,200 kW; 1,600 PS) R-2600-3 was originally intended for the C-46 Commando (being fitted to the prototype CW-20A). It was also the original engine choice for the F6F Hellcat; a running change (one which would not stop production) for the CW-20A, and one in late April 1942 for the second XF6F-1, led to the adoption of the 2,000 hp (1,500 kW; 2,000 PS) Pratt & Whitney R-2800 Double Wasp in the R-2600's place for both designs.

The Twin Cyclone went on to power several important American World War II aircraft, including the A-20 Havoc, B-25 Mitchell, TBF Avenger, SB2C Helldiver, and the PBM Mariner.

Over 50,000 R-2600s were built at plants in Paterson, New Jersey, and Cincinnati, Ohio.

Variants edit

  • R-2600-1 - 1,600 hp (1,194 kW)
  • R-2600-2 - 1,500 hp (1,118 kW)- Prototype variant; Few were made.[2]
  • R-2600-3 - 1,600 hp (1,194 kW)
  • R-2600-4 - 1,650 hp (1,230 kW)[3]
  • R-2600-6 - 1,600 hp (1,194 kW)
  • R-2600-8 - 1,700 hp (1,268 kW)
  • R-2600-9 - 1,700 hp (1,268 kW)
  • R-2600-10 - 1,700 hp (1,268 kW)- Experimental high-altitude R-2600 variant with a two-stage mechanical supercharger, vs the usual single-stage supercharger. The 2600-10 also served as a testbed for turbo-supercharging the 2600 series. Very few were produced.[4][5]
  • R-2600-11 - 1,600 hp (1,194 kW)[6]
  • R-2600-12 - 1,700 hp (1,268 kW)
  • R-2600-13 - 1,700 hp (1,268 kW)
  • R-2600-14 - 1,700 hp (1,268 kW)- One of the engines which powered Grumman's prototype F6Fs, the XF6F-1 (the two-stage supercharged R-2600-10 was also tested in the XF6F-1). Grumman was not happy with the performance, which led to the 2,000 hp Pratt & Whitney R-2800 engine replacing the R-2600 on F6F production models.[7]
  • R-2600-15 - 1,800 hp (1,342 kW)- Planned to power the XB-33A, a prototype model of the B-33 Super Marauder (itself a high-altitude version of the B-26 Marauder). The project was cancelled, and neither the prototype XB-33A or production B-33A were ever built.[8]
  • R-2600-16 - 1,700 hp (1,268 kW)- Similar to the R-2600-10 & -14, the -16 powered a Grumman prototype F6F, the XF6F-2.[9]
  • R-2600-19 - 1,600 hp (1,194 kW), 1,660 hp (1,237 kW)
  • R-2600-20 - 1,700 hp (1,268 kW), 1,900 hp (1,420 kW)
  • R-2600-22 - 1,900 hp (1,420 kW)
  • R-2600-23 - 1,600 hp (1,194 kW)
  • R-2600-29 - 1,700 hp (1,268 kW), 1,850 hp (1,380 kW)
  • GR-2600-A5B - 1,500 hp (1,118 kW), 1,600 hp (1,194 kW), 1,700 hp (1,268 kW)
  • GR-2600-A71 - 1,300 hp (969 kW)
  • GR-2600-C14 - 1,750 hp (1,304 kW)

Applications edit

 
Wright R-2600-3 on a B-23 Dragon
 
Wright R-2600 Cyclone being fitted to a North American B-25 Mitchell, at North American Aviation, Inglewood, California
 
R-2600 on display at Museum of Aviation, Robins AFB

Specifications (GR-2600-C14BB) edit

Data from Jane's.[10]

General characteristics

  • Type: 14-cylinder supercharged air-cooled two-row radial engine
  • Bore: 6+1⁄8 in (155.6 mm)
  • Stroke: 6+5⁄16 in (160.3 mm)
  • Displacement: 2,604 cu in (42.67 L)
  • Length: 62.06 in (1,576 mm)
  • Diameter: 55 in (1,397 mm)
  • Dry weight: 2,045 lb (928 kg)

Components

Performance

  • Power output:
    • 1,750 hp (1,300 kW) at 2,600 rpm at 3,200 ft (1,000 m) military power
    • 1,450 hp (1,080 kW) at 2,600 rpm at 15,000 ft (4,600 m) military power
  • Specific power: 0.67 hp/cu in (30 kW/L)
  • Compression ratio: 6.9:1
  • Power-to-weight ratio: 0.86 hp/lb (1.41 kW/kg)

See also edit

Related development

Comparable engines

Related lists

References edit

Notes edit

  1. ^ (PDF). Archived from the original (PDF) on 2021-10-10. Retrieved 2023-09-18.
  2. ^ Friedman, Norman (30 October 2016). Fighters Over the Fleet Naval Air Defence from Biplanes to the Cold War (1 ed.). Pen & Sword Books. p. 61. ISBN 9781848324060. The prototype R-2600-2, rated at 1,500hp for take-off ...
  3. ^ "Teesside Aviation News" (PDF) (Press release). Teesside, UK: Teesside Aviation Society. 1982-11-01. Retrieved 2021-04-06. ... for the RAF, 19 were experimentally fitted with R-2600-4-53 Cyclones ... engines of 1650 hp.
  4. ^ Francillon, Renè (1989). Grumman Aircraft Since 1929. Putnam Aeronautical. p. 196. ISBN 9780851778358. Retrieved 2021-04-03.
  5. ^ Grossnick, Roy (1995). "Appendix 1: Aircraft Data—Technical Information and Drawings" (PDF). TBF/TBM Avenger. Dictionary of American Naval Aviation Squadrons. Vol. I: The History of VA, VAH, VAK, VAL, VAP, and VFA Squadrons. Washington Navy Yard, Washington D.C.: Naval Historical Center, Department of the Navy. p. 512. ISBN 0-945274-29-7. Retrieved 2021-04-03 – via Naval History and Heritage Command.
  6. ^ United States Civil Aeronautics Administration Aircraft Listing. United States Civil Aeronautics Administration. 1949. p. 68. Retrieved 2021-04-03.
  7. ^ Thomas, Cleaver (19 Oct 2017). "The Pacific Theater". Pacific Thunder The US Navy's Central Pacific Campaign, August 1943–October 1944 (1 ed.). Bloomsbury Publishing. p. 45. ISBN 9781472821867. The XF6F-1 was powered by the Wright R-2600 14- cylinder Twin Cyclone radial engine. After meeting O'Hare, Grumman suggested a power increase which ... put the super new Pratt & Whitney R-2800 ... in the second prototype.
  8. ^ Andrade 1979, p 51
  9. ^ Thruelsen 1976, p 193
  10. ^ Jane's 1998, p. 317.
  11. ^ Liss, Witold (1967). The Lavochkin La 5 & 7. Aircraft Profiles. Vol. 149. Leatherhead, Surrey, UK: Profile Publications. p. 3.

Bibliography edit

  • Andrade, John (1979). U.S.Military Aircraft Designations and Serials since 1909. Midland Counties Publications. ISBN 0-904597-22-9.
  • Bridgman, Leonard, ed. (1998). Jane's Fighting Aircraft of World War II. London: Studio Editions Ltd. ISBN 0-517-67964-7.
  • Gunston, Bill (2006). World Encyclopedia of Aero Engines: From the Pioneers to the Present Day (5th ed.). Stroud, UK: Sutton. ISBN 0-7509-4479-X.
  • Thruelsen, Richard (1976). The Grumman Story. New York: Praeger Publishers. ISBN 0-275-54260-2.
  • White, Graham (1995). Allied Aircraft Piston Engines of World War II: History and Development of Frontline Aircraft Piston Engines Produced by Great Britain and the United States During World War II. Warrendale, Pennsylvania: SAE International. ISBN 1-56091-655-9.

External links edit

  Media related to Wright R-2600 at Wikimedia Commons

January 01, 1970
wright, 2600, twin, cyclone, wright, 2600, cyclone, also, called, twin, cyclone, american, radial, engine, developed, curtiss, wright, widely, used, aircraft, 1930s, 1940s, 2600, wright, 2600, cyclone, radial, engine, type, radial, engine, national, origin, un. The Wright R 2600 Cyclone 14 also called Twin Cyclone is an American radial engine developed by Curtiss Wright and widely used in aircraft in the 1930s and 1940s R 2600 Wright R 2600 Cyclone radial engine Type Radial engine National origin United States Manufacturer Wright Aeronautical First run 1935 Major applications Curtiss SB2C Helldiver Douglas A 20 Havoc Grumman TBF Avenger Martin PBM Mariner North American B 25 Mitchell Number built 85 374 1 Developed from Wright R 1820 Contents 1 History 2 Variants 3 Applications 4 Specifications GR 2600 C14BB 4 1 General characteristics 4 2 Components 4 3 Performance 5 See also 6 References 6 1 Notes 6 2 Bibliography 7 External linksHistory editIn 1935 Curtiss Wright began work on a more powerful version of their successful R 1820 Cyclone 9 The result was the R 2600 Twin Cyclone with 14 cylinders arranged in two rows The 1 600 hp 1 200 kW 1 600 PS R 2600 3 was originally intended for the C 46 Commando being fitted to the prototype CW 20A It was also the original engine choice for the F6F Hellcat a running change one which would not stop production for the CW 20A and one in late April 1942 for the second XF6F 1 led to the adoption of the 2 000 hp 1 500 kW 2 000 PS Pratt amp Whitney R 2800 Double Wasp in the R 2600 s place for both designs The Twin Cyclone went on to power several important American World War II aircraft including the A 20 Havoc B 25 Mitchell TBF Avenger SB2C Helldiver and the PBM Mariner Over 50 000 R 2600s were built at plants in Paterson New Jersey and Cincinnati Ohio Variants editR 2600 1 1 600 hp 1 194 kW R 2600 2 1 500 hp 1 118 kW Prototype variant Few were made 2 R 2600 3 1 600 hp 1 194 kW R 2600 4 1 650 hp 1 230 kW 3 R 2600 6 1 600 hp 1 194 kW R 2600 8 1 700 hp 1 268 kW R 2600 9 1 700 hp 1 268 kW R 2600 10 1 700 hp 1 268 kW Experimental high altitude R 2600 variant with a two stage mechanical supercharger vs the usual single stage supercharger The 2600 10 also served as a testbed for turbo supercharging the 2600 series Very few were produced 4 5 R 2600 11 1 600 hp 1 194 kW 6 R 2600 12 1 700 hp 1 268 kW R 2600 13 1 700 hp 1 268 kW R 2600 14 1 700 hp 1 268 kW One of the engines which powered Grumman s prototype F6Fs the XF6F 1 the two stage supercharged R 2600 10 was also tested in the XF6F 1 Grumman was not happy with the performance which led to the 2 000 hp Pratt amp Whitney R 2800 engine replacing the R 2600 on F6F production models 7 R 2600 15 1 800 hp 1 342 kW Planned to power the XB 33A a prototype model of the B 33 Super Marauder itself a high altitude version of the B 26 Marauder The project was cancelled and neither the prototype XB 33A or production B 33A were ever built 8 R 2600 16 1 700 hp 1 268 kW Similar to the R 2600 10 amp 14 the 16 powered a Grumman prototype F6F the XF6F 2 9 R 2600 19 1 600 hp 1 194 kW 1 660 hp 1 237 kW R 2600 20 1 700 hp 1 268 kW 1 900 hp 1 420 kW R 2600 22 1 900 hp 1 420 kW R 2600 23 1 600 hp 1 194 kW R 2600 29 1 700 hp 1 268 kW 1 850 hp 1 380 kW GR 2600 A5B 1 500 hp 1 118 kW 1 600 hp 1 194 kW 1 700 hp 1 268 kW GR 2600 A71 1 300 hp 969 kW GR 2600 C14 1 750 hp 1 304 kW Applications edit nbsp Wright R 2600 3 on a B 23 Dragon nbsp Wright R 2600 Cyclone being fitted to a North American B 25 Mitchell at North American Aviation Inglewood California nbsp R 2600 on display at Museum of Aviation Robins AFB Boeing 314 Clipper Brewster SB2A Buccaneer Curtiss SB2C Helldiver Douglas A 20 Havoc Douglas B 23 Dragon Grumman F6F Hellcat XF6F 1 amp 2 prototypes only pre April 1942 Grumman TBF Avenger Liore et Olivier LeO 451 Martin Baltimore Martin PBM Mariner versions prior to Double Wasp powered PBM 5 Miles Monitor North American B 25 Mitchell Vultee A 31 VengeanceSpecifications GR 2600 C14BB editData from Jane s 10 General characteristics Type 14 cylinder supercharged air cooled two row radial engine Bore 6 1 8 in 155 6 mm Stroke 6 5 16 in 160 3 mm Displacement 2 604 cu in 42 67 L Length 62 06 in 1 576 mm Diameter 55 in 1 397 mm Dry weight 2 045 lb 928 kg Components Valvetrain Two pushrod actuated valves per cylinder with sodium cooled exhaust valve Supercharger Single stage two speed centrifugal type supercharger impeller diameter 11 in 280 mm blower ratio 7 06 1 at slow speed and 10 06 1 at high speed Fuel system Stromberg PR48A downdraft carburetor with automatic mixture control Oil system Dry sump with one pressure pump and two scavenge pumps Cooling system Air cooled Performance Power output 1 750 hp 1 300 kW at 2 600 rpm at 3 200 ft 1 000 m military power 1 450 hp 1 080 kW at 2 600 rpm at 15 000 ft 4 600 m military power Specific power 0 67 hp cu in 30 kW L Compression ratio 6 9 1 Power to weight ratio 0 86 hp lb 1 41 kW kg See also editGunderson Do All Machine incorporates an R 2600 into an educational network of machines that is also kinetic art Related development Wright Cyclone series Wright R 1300 Cyclone 7 Wright R 1820 Cyclone Wright R 3350 Duplex Cyclone Hispano Suiza 14AA Comparable engines BMW 801 Bristol Hercules Fiat A 74 Gnome Rhone 14N Mitsubishi Kasei Pratt amp Whitney R 2800 Shvetsov ASh 82 derived and metricated from Wright Aeronautical radial engine designs 11 Related lists List of aircraft enginesReferences editNotes edit SUMMARY OF WRIGHT ENGINE SHIPMENTS 1920 1930 PDF Archived from the original PDF on 2021 10 10 Retrieved 2023 09 18 Friedman Norman 30 October 2016 Fighters Over the Fleet Naval Air Defence from Biplanes to the Cold War 1 ed Pen amp Sword Books p 61 ISBN 9781848324060 The prototype R 2600 2 rated at 1 500hp for take off Teesside Aviation News PDF Press release Teesside UK Teesside Aviation Society 1982 11 01 Retrieved 2021 04 06 for the RAF 19 were experimentally fitted with R 2600 4 53 Cyclones engines of 1650 hp Francillon Rene 1989 Grumman Aircraft Since 1929 Putnam Aeronautical p 196 ISBN 9780851778358 Retrieved 2021 04 03 Grossnick Roy 1995 Appendix 1 Aircraft Data Technical Information and Drawings PDF TBF TBM Avenger Dictionary of American Naval Aviation Squadrons Vol I The History of VA VAH VAK VAL VAP and VFA Squadrons Washington Navy Yard Washington D C Naval Historical Center Department of the Navy p 512 ISBN 0 945274 29 7 Retrieved 2021 04 03 via Naval History and Heritage Command United States Civil Aeronautics Administration Aircraft Listing United States Civil Aeronautics Administration 1949 p 68 Retrieved 2021 04 03 Thomas Cleaver 19 Oct 2017 The Pacific Theater Pacific Thunder The US Navy s Central Pacific Campaign August 1943 October 1944 1 ed Bloomsbury Publishing p 45 ISBN 9781472821867 The XF6F 1 was powered by the Wright R 2600 14 cylinder Twin Cyclone radial engine After meeting O Hare Grumman suggested a power increase which put the super new Pratt amp Whitney R 2800 in the second prototype Andrade 1979 p 51 Thruelsen 1976 p 193 Jane s 1998 p 317 Liss Witold 1967 The Lavochkin La 5 amp 7 Aircraft Profiles Vol 149 Leatherhead Surrey UK Profile Publications p 3 Bibliography edit Andrade John 1979 U S Military Aircraft Designations and Serials since 1909 Midland Counties Publications ISBN 0 904597 22 9 Bridgman Leonard ed 1998 Jane s Fighting Aircraft of World War II London Studio Editions Ltd ISBN 0 517 67964 7 Gunston Bill 2006 World Encyclopedia of Aero Engines From the Pioneers to the Present Day 5th ed Stroud UK Sutton ISBN 0 7509 4479 X Thruelsen Richard 1976 The Grumman Story New York Praeger Publishers ISBN 0 275 54260 2 White Graham 1995 Allied Aircraft Piston Engines of World War II History and Development of Frontline Aircraft Piston Engines Produced by Great Britain and the United States During World War II Warrendale Pennsylvania SAE International ISBN 1 56091 655 9 External links edit nbsp Media related to Wright R 2600 at Wikimedia Commons Retrieved from https en wikipedia org w index php title Wright R 2600 Twin Cyclone amp oldid 1223026986, wikipedia, wiki, book, books, library,

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