Pratt & Whitney R-1830 Twin Wasp

The Pratt & Whitney R-1830 Twin Wasp is an American air-cooled radial aircraft engine. It displaces 1830 cuin and its bore and stroke are both 5.5 in. 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 5.75 in 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: 800 hp
 * R-1830-9: 850 hp, 950 hp
 * R-1830-11: 800 hp
 * R-1830-13: 900 hp, 950 hp, 1050 hp
 * R-1830-17: 1200 hp
 * R-1830-21: 1200 hp
 * R-1830-25: 1100 hp
 * R-1830-33: 1200 hp
 * R-1830-35: 1200 hp Fitted with GE B-2 turbosupercharger
 * R-1830-41: 1200 hp Fitted with GE B-2 turbosupercharger
 * R-1830-43: 1200 hp
 * R-1830-45: 1050 hp
 * R-1830-49: 1200 hp
 * R-1830-64: 850 hp, 900 hp
 * R-1830-65: 1200 hp
 * R-1830-66: 1000 hp, 1050 hp, 1200 hp
 * R-1830-72: 1050 hp
 * R-1830-75: 1350 hp
 * R-1830-76: 1200 hp
 * R-1830-82: 1200 hp
 * R-1830-86: 1200 hp
 * R-1830-88: 1200 hp
 * R-1830-90: 1200 hp
 * R-1830-90-B: 1200 hp
 * R-1830-92: 1200 hp
 * R-1830-94: 1350 hp
 * R-1830-S1C3-G: 1050 hp, 1200 hp
 * R-1830-S3C4-G: 1200 hp
 * R-1830-S6C3-G: 1100 hp
 * R-1830-SC-G: 900 hp
 * R-1830-SC2-G: 900 hp, 1050 hp
 * R-1830-SC3-G: 1065 hp 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
 * 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 Airbase Arizona Museum in Mesa, Arizona