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.

• 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, DC

• 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