The Pratt & Whitney R-1830 Twin Wasp is an American air-cooled radial aircraft engine. It has 14 cylinders, arranged in two rings of seven. It displaces and its bore and stroke are both . The design traces its history to 1929 experiments at Pratt & Whitney on twin-row designs. Production began in 1932 and it was widely used during the 1930s.

It was selected as the power plant for both the four-engined Consolidated B-24 Liberator heavy bomber and the twin-engined Douglas DC-3 transport, two of the most-produced aircraft. The production run of 173,618 R-1830 examples makes it the most-produced aviation engine in history.

A further developed version, the R-2000, was produced starting in 1942. The R-2000 was "bored-out" to and had a number of other minor changes to improve fuel economy and allow it to run at higher power ratings on lower-octane fuel. The primary user of the R-2000 was the Douglas DC-4.

Mostly retired today, the R-1830 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 is still a market for second-hand engines and parts.

Variants R-1830-1: R-1830-9: , R-1830-11: R-1830-13: , , R-1830-17: R-1830-21: R-1830-25: R-1830-33: R-1830-35: Fitted with GE B-2 turbosupercharger R-1830-41: Fitted with GE B-2 turbosupercharger R-1830-43: R-1830-45: R-1830-49: R-1830-64: , R-1830-65: R-1830-66: , , R-1830-72: R-1830-75: R-1830-76: R-1830-82: R-1830-86: R-1830-88: R-1830-90: R-1830-90-B: R-1830-92: R-1830-94: R-1830-S1C3-G: , R-1830-S3C4-G: R-1830-S6C3-G: R-1830-SC-G: R-1830-SC2-G: , R-1830-SCG-3: same engine built in Sweden as STWC-3G by SFA company for Swedish J 22, B 17 and B 18.

Applications

Bloch MB.176 Boeing XB-15 Budd RB Conestoga Burnelli CBY-3 CAC Boomerang – Australian "emergency fighter" CAC Woomera Chu XP-0 Consolidated B-24 Liberator Consolidated PBY Catalina Consolidated PB2Y Coronado Consolidated PB4Y Privateer Curtiss P-36 Hawk DAP Beaufort – Australian-built variants of Bristol Beaufort Douglas C-47 Skytrain Douglas DC-3 Douglas DB-7 – early variants only Douglas TBD Devastator FFVS J 22 – "emergency fighter"; built in-house by the Swedish Air Force Grumman F4F Wildcat I.Ae. 24 Calquin Laird-Turner Meteor LTR-14 Lioré et Olivier LeO 453 Lockheed Model 18 Lodestar Lisunov Li-3 – a Yugoslav version of the Lisunov Li-2 Martin Maryland Martin M-130 Republic P-43 Lancer Saab 17 Saab 18 Short Sunderland V Seversky P-35 Vickers Wellington IV VL Myrsky – Finnish "emergency fighter" Vultee P-66 Vanguard

Engines on display Model R-1830-65 on display at the Museo Nacional de Aeronautica, Buenos Aires, Argentina Model R-1830-86 on display at the New England Air Museum, Bradley International Airport, Windsor Locks, Connecticut.New England Air Museum Exhibit page R-1830-86 Twin Wasp Retrieved: 2 November 2013 Model R-1830-90C on display at the Dutch aviation museum Aviodrome Model R-1830-92 displayed at the Smithsonian Institution's National Air and Space Museum in Washington, DCCollection: Pratt & Whitney Twin Wasp R-1830-92 Radial Engine Retrieved: 3 December 2014 Model R-1830 on display at the Northeast Classic Car Museum in Norwich, New York Model R-1830 cut-away display at Arizona Commemorative Air Force Museum in Mesa, Arizona

Specifications (R-1830-S1C-G)

See also

References Notes

Bibliography

Gunston, Bill. World Encyclopedia of Aero Engines: From the Pioneers to the Present Day. 5th edition, Stroud, UK: Sutton, 2006. 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.

External links

Pratt & Whitney's R-1830 page List of R-1830 Variants