Pratt & Whitney R-1830 Twin Wasp








































R-1830 Twin Wasp

R-1830 IWM.JPG
R-1830 on display at the Imperial War Museum Duxford
Type
Radial engine

National origin
 United States
Manufacturer
Pratt & Whitney
First run
 1932

Major applications
Consolidated B-24 Liberator
Douglas C-47 Skytrain
Grumman F4F Wildcat
Consolidated PBY Catalina

Number built
 173,618 [1]
Variants
Pratt & Whitney R-2000 Twin Wasp

The Pratt & Whitney R-1830 Twin Wasp is an American aircraft engine widely used in the 1930s and 1940s. Produced by Pratt & Whitney, it is a two-row, 14-cylinder, air-cooled radial design with seven cylinders on a row. It displaces 1,830 cu in (30.0 L) and its bore and stroke are both 5.5 in (140 mm). A total of 173,618 R-1830 engines were built,[1] and from their use in two of the most-produced aircraft ever built, the four-engined B-24 heavy bomber and twin-engined DC-3 transport, more Twin Wasps may have been built than any other aviation piston engine in history. A "bored-out" version (to a 5.75 inch/146 mm cylinder bore) with a slightly higher power rating and other slight changes in detail design was produced as the R-2000. Mostly retired today, it is still used on Douglas DC-3 and various museum aircraft and warbirds seen at airshows. It is not manufactured anymore, but spares are still available and there exists a wide market for second-hand engines and parts.




Contents






  • 1 Variants


  • 2 Applications


  • 3 Engines on display


  • 4 Specifications (R-1830-S1C-G)


    • 4.1 General characteristics


    • 4.2 Components


    • 4.3 Performance




  • 5 See also


  • 6 References


    • 6.1 Notes


    • 6.2 Bibliography




  • 7 External links





Variants




  • R-1830-1: 800 hp (597 kW)


  • R-1830-9: 850 hp (634 kW), 950 hp (708 kW)


  • R-1830-11: 800 hp (597 kW)


  • R-1830-13: 900 hp (671 kW), 950 hp (708 kW), 1,050 hp (783 kW)


  • R-1830-17: 1,200 hp (895 kW)


  • R-1830-21: 1,200 hp (895 kW)


  • R-1830-25: 1,100 hp (820 kW)


  • R-1830-33: 1,200 hp (895 kW)


  • R-1830-35: 1,200 hp (895 kW) Fitted with GE B-2 turbosupercharger


  • R-1830-41: 1,200 hp (895 kW) Fitted with GE B-2 turbosupercharger


  • R-1830-43: 1,200 hp (895 kW)


  • R-1830-45: 1,050 hp (783 kW)


  • R-1830-49: 1,200 hp (895 kW)


  • R-1830-64: 850 hp (634 kW), 900 hp (671 kW)


  • R-1830-65: 1,200 hp (895 kW)


  • R-1830-66: 1,000 hp (746 kW), 1,050 hp (783 kW), 1,200 hp (895 kW)


  • R-1830-72: 1,050 hp (783 kW)


  • R-1830-75: 1,350 hp (1,007 kW)


  • R-1830-76: 1,200 hp (895 kW)


  • R-1830-82: 1,200 hp (895 kW)


  • R-1830-86: 1,200 hp (895 kW)


  • R-1830-88: 1,200 hp (895 kW)


  • R-1830-90: 1,200 hp (895 kW)


  • R-1830-90-B: 1,200 hp (895 kW)


  • R-1830-92: 1,200 hp (895 kW)


  • R-1830-94: 1,350 hp (1,007 kW)


  • R-1830-S1C3-G: 1,050 hp (783 kW), 1,200 hp (895 kW)


  • R-1830-S3C4: 1,200 hp (895 kW)


  • R-1830-S3C4-G: 1,200 hp (895 kW)


  • R-1830-S6C3-G: 1,100 hp (820 kW)


  • R-1830-SC-G: 900 hp (671 kW)


  • R-1830-SC2-G: 900 hp (671 kW), 1,050 hp (783 kW)


  • R-1830-SC3-G: 1,065 hp (749 kW) same engine built in Sweden as STWC-3G by SFA company for Swedish J-22, B-17 and B-18.



Applications




R-1830 mounted on the left wing of an ex-military Douglas C-47




RAF Dakota's Twin Wasp out for servicing




  • Bristol Beaufort (Australian-built production)

  • Bloch MB.176

  • Boeing XB-15

  • Budd RB Conestoga

  • Burnelli CBY-3

  • CAC Boomerang

  • CAC Woomera

  • Consolidated B-24 Liberator

  • Consolidated PBY Catalina

  • Consolidated PB2Y Coronado

  • Consolidated PB4Y Privateer

  • Curtiss P-36 Hawk

  • Douglas C-47 Skytrain

  • Douglas DC-3


  • Douglas DB-7 (early variants only)

  • Douglas TBD Devastator

  • FFVS J 22

  • Grumman F4F Wildcat

  • I.Ae. 24 Calquin

  • Laird-Turner Meteor LTR-14

  • Lioré et Olivier LeO 453

  • Lisunov Li-3 - A Yugoslav version of the Soviet Lisunov Li-2

  • Martin Maryland

  • Restored Mitsubishi A6M Zero warbird aircraft

  • Republic P-43 Lancer

  • Saab 17

  • Saab 18


  • Short Sunderland V

  • Seversky P-35


  • Vickers Wellington IV

  • VL Myrsky

  • Vultee P-66 Vanguard



Engines on display



  • Model R-1830-92 displayed at the Smithsonian Institution's National Air and Space Museum in Washington, DC[2]

  • Model R-1830-86 on display at the New England Air Museum, Bradley International Airport, Windsor Locks, Connecticut.[3]

  • Model R-1830 on display at the Northeast Classic Car Museum in Norwich, New York

  • Model R-1830 on display at the Dutch aviation museum Aviodrome

  • Model R-1830 cut-away display at Airbase Arizona Museum in Mesa, Arizona [4]

  • Model R-1830/65 on display at the Museo Nacional de Aeronautica, Buenos Aires, Argentina[citation needed]



Specifications (R-1830-S1C-G)




Pratt & Whitney R-1830 "Twin Wasp" (sectioned)


Data from [5]


General characteristics




  • Type: Fourteen-cylinder two-row supercharged air-cooled radial engine


  • Bore: 5.5 in (139.7 mm)


  • Stroke: 5.5 in (139.7 mm)


  • Displacement: 1,829.4 in³ (29.978 l)


  • Length: 59.06 in (1,500 mm)


  • Diameter: 48.03 in (1,220 mm)


  • Dry weight: 1,250 lb (567 kg)


Components




  • Valvetrain: Two overhead valves per cylinder


  • Supercharger: Single-speed General Electric centrifugal type supercharger, 1:7.15 speed increase


  • Fuel system: Two-barrel Stromberg carburetor


  • Fuel type: 95-100 octane rating gasoline


  • Cooling system: Air-cooled


  • Reduction gear: Epicyclic gearing, 2:3


Performance




  • Power output:


  • 1,200 hp (895 kW) at 2,700 rpm for takeoff

  • 700 hp (522 kW) at 2,325 rpm cruise power at 13,120 ft (4,000 m)


  • Specific power: 0.66 hp/in³ (29.83 kW/l)


  • Compression ratio: 6.7:1


  • Specific fuel consumption: 0.49 lb/(hp•h) (295 g/(kW•h))


  • Power-to-weight ratio: 0.96 hp/lb (1.58 kW/kg)



See also



Related development




  • Pratt & Whitney Wasp series


  • Pratt & Whitney R-985 Wasp Junior


  • Pratt & Whitney R-1340 Wasp


  • Pratt & Whitney R-1535 Twin Wasp Junior


  • Pratt & Whitney R-2000 Twin Wasp


  • Pratt & Whitney R-2800 Double Wasp


  • Pratt & Whitney R-4360 Wasp Major



Comparable engines



  • BMW 801

  • Bristol Taurus

  • Fiat A.74

  • Gnome-Rhône 14N

  • Mitsubishi Kinsei

  • Nakajima Sakae

  • Piaggio P.XI

  • Piaggio P.XIX

  • Shvetsov ASh-82

  • Tumansky M-88

  • Wright R-1820


Related lists


  • List of aircraft engines


References



Notes





  1. ^ ab - Archived (Nov. 11, 2013) manufacturer's product page, R-1830 Retrieved: 7 February 2019


  2. ^ Collection: Pratt & Whitney Twin Wasp R-1830-92 Radial Engine Retrieved: 3 December 2014


  3. ^ New England Air Museum Exhibit page R-1830-86 Twin Wasp Retrieved: 2 November 2013


  4. ^ www.azcaf.org


  5. ^ Tsygulev (1939). Aviacionnye motory voennykh vozdushnykh sil inostrannykh gosudarstv (Авиационные моторы военных воздушных сил иностранных государств) (in Russian). Moscow: Gosudarstvennoe voennoe izdatelstvo Narkomata Oborony Soyuza SSR. Archived from the original on 24 March 2009..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}




Bibliography




  • Angelucci, Enzo (2006) [1988]. Complete Book of World War II Combat Aircraft. VMB Publishers. ISBN 978-88-540-0829-8.

  • Bridgman, Leonard, ed. Jane's All The World's Aircraft 1951–1952. London: Samson Low, Marston & Company, Ltd 1951.

  • Gunston, Bill. World Encyclopedia of Aero Engines: From the Pioneers to the Present Day. 5th edition, Stroud, UK: Sutton, 2006.
    ISBN 0-7509-4479-X

  • White, Graham. 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, 1995.
    ISBN 1-56091-655-9



External links







  • Pratt & Whitney's R-1830 page

  • List of R-1830 Variants











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