Pratt & Whitney R-1830 Twin Wasp
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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 Script error: No such module "convert". and its bore and stroke are both Template:Cvt. 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[1] 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 Template:Cvt 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: Template:Cvt
- R-1830-9: Template:Cvt, Template:Cvt
- R-1830-11: Template:Cvt
- R-1830-13: Template:Cvt, Template:Cvt, Template:Cvt
- R-1830-17: Template:Cvt
- R-1830-21: Template:Cvt
- R-1830-25: Template:Cvt
- R-1830-33: Template:Cvt
- R-1830-35: Template:Cvt Fitted with GE B-2 turbosupercharger
- R-1830-41: Template:Cvt Fitted with GE B-2 turbosupercharger
- R-1830-43: Template:Cvt
- R-1830-45: Template:Cvt
- R-1830-49: Template:Cvt
- R-1830-64: Template:Cvt, Template:Cvt
- R-1830-65: Template:Cvt
- R-1830-66: Template:Cvt, Template:Cvt, Template:Cvt
- R-1830-72: Template:Cvt
- R-1830-75: Template:Cvt
- R-1830-76: Template:Cvt
- R-1830-82: Template:Cvt
- R-1830-86: Template:Cvt
- R-1830-88: Template:Cvt
- R-1830-90: Template:Cvt
- R-1830-90-B: Template:Cvt
- R-1830-92: Template:Cvt
- R-1830-94: Template:Cvt
- R-1830-S1C3-G: Template:Cvt, Template:Cvt
- R-1830-S3C4-G: Template:Cvt
- R-1830-S6C3-G: Template:Cvt
- R-1830-SC-G: Template:Cvt
- R-1830-SC2-G: Template:Cvt, Template:Cvt
- R-1830-SC3-G: Template:Cvt 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, ArgentinaScript error: No such module "Unsubst".
- Model R-1830-86 on display at the New England Air Museum, Bradley International Airport, Windsor Locks, Connecticut.[2]
- 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[3]
- 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[4]
Specifications (R-1830-S1C-G)
General characteristics
- Type: Fourteen-cylinder two-row supercharged air-cooled radial engine
- Bore: Template:Cvt
- Stroke: Template:Cvt
- Displacement: Template:Cvt
- Length: Template:Cvt
- Diameter: Template:Cvt
- Dry weight: Template:Cvt
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, 3:2 (16:9 for many variants)
Performance
- Power output:
- Template:Cvt at 2,700 rpm for takeoff
- Template:Cvt at 2,325 rpm cruise power at 13,120 ft (4,000 m)
- Specific power: Template:Cvt
- Compression ratio: 6.7:1
- Specific fuel consumption: 0.49 lb/(hp•h) (295 g/(kW•h))
- Power-to-weight ratio: Template:Cvt
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
References
Notes
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- ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
- ↑ New England Air Museum Exhibit page R-1830-86 Twin Wasp Retrieved: 2 November 2013
- ↑ Collection: Pratt & Whitney Twin Wasp R-1830-92 Radial Engine Template:Webarchive Retrieved: 3 December 2014
- ↑ Script error: No such module "citation/CS1".
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Bibliography
- Script error: No such module "citation/CS1".
- 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.Template:ISBN
- 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. Template:ISBN
External links
Template:P&W piston engines Template:US military piston aeroengines