Pratt & Whitney R-1535 Twin Wasp Junior
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 | This article includes a list ofgeneral references,butit lacks sufficient correspondinginline citations.(April 2018) |
| R-1535 Twin Wasp Junior | |
|---|---|
| |
| Pratt & Whitney Twin Wasp Junior, at theNational Museum of Naval Aviation,Pensacola, Florida | |
| Type | Radial engine |
| National origin | United States |
| Manufacturer | Pratt & Whitney |
| First run | 1932 |
| Major applications | |
| Developed from | Pratt & Whitney R-985 Wasp Junior |
ThePratt & Whitney R-1535 Twin Wasp Junioris an American aircraft engine developed in the 1930s. The engine was introduced in 1932 as a 14-cylinder version of the 9-cylinderR-985,and was a two-row, air-cooled radial design.Displacementwas 1,535 cu in (25.2 L);boreand stroke were both5+3⁄16in (132 mm).[1]
Variants
[edit]- R-1535-11- 750 hp (560 kW)
- R-1535-13- 750 hp (560 kW), 825 hp (615 kW)
- R-1535-44- 625 hp (466 kW)
- R-1535-72- 650 hp (480 kW)
- R-1535-94- 825 hp (615 kW)
- R-1535-96- 825 hp (615 kW)
- R-1535-98- 700 hp (520 kW)
- R-1535-SB4-G- 825 hp (615 kW)
Applications
[edit]- Bellanca 28-70
- Boeing XF6B
- Breguet 695
- Bristol Fairchild Bolingbroke(Canadian licence-built version of the Blenheim)
- Canadian Car and Foundry FDB-1
- Consolidated XB2Y
- Curtiss SBC-3 Helldiver
- Douglas O-46
- Fokker G.I(G.I The Wasp)
- Fokker D.XXI(Finnish licence-built series 4 and 5)
- Great Lakes BG
- Grumman F2F
- Grumman F3F-1
- Grumman XJF-1 Duck(prototype only)
- Grumman XSBF
- Grumman XSF-2
- Hughes H-1 Racer
- Miles Master
- Northrop A-17
- Northrop BT
- Northrop XFT-2
- Vought SBU Corsair
- Vought SB2U Vindicator
- Vought V-141
- Vought XF3U
- Vought XO4U-2
Engines on display
[edit]- There is a R-1535-96 on display at theNew England Air Museum,Bradley International Airport,Windsor Locks, CT.[2]
- There is an R-1535 on display at theSan Diego Air and Space Museum.It is now being installed in the museum'sHughes H-1 Racerreproduction project.[citation needed]
Specifications (R-1535-SB4-G)
[edit]Data from[3]
General characteristics
- Type:Fourteen-cylinder two-row supercharged air-cooledradial engine
- Bore:5+3⁄16in (131.8 mm)
- Stroke:5+3⁄16in (131.8 mm)
- Displacement:1,534.9 cu in (25.153 L)
- Length:53.27 in (1,353 mm)
- Diameter:44.13 in (1,121 mm)
- Dry weight:1,087 lb (493 kg)
Components
- Valvetrain:Twooverhead valvesper cylinder
- Supercharger:Single-speedcentrifugal type supercharger,11:1 step-up
- Fuel system:Two-barrelStrombergcarburetor
- Fuel type:87octane ratinggasoline
- Cooling system:Air-cooled
- Reduction gear:Epicyclic gearing,0.75:1
Performance
- Power output:825 hp (615 kW) at 2,625 rpm for takeoff
- Specific power:0.54 hp/cu in (24.57 kW/L)
- Compression ratio:6.75:1
- Specific fuel consumption:0.49 lb/(hp•h) (295 g/(kW•h))
- Oil consumption:0.39 oz/(hp•h) (15 g/(kW•h))
- Power-to-weight ratio:0.76 hp/lb (1.25 kW/kg)
See also
[edit]Related development
- Pratt & Whitney R-985 Wasp Junior
- Pratt & Whitney R-1340 Wasp
- Pratt & Whitney R-1830 Twin Wasp
- Pratt & Whitney R-2800 Double Wasp
- Pratt & Whitney R-4360 Wasp Major
Comparable engines
Related lists
References
[edit]Notes
[edit]- ^"P&W Twin Wasp Junior(R-1535)".enginehistory.org.Retrieved2024-09-23.
- ^"Pratt & Whitney R-1535-96 Twin Wasp Junior"
- ^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.
Bibliography
[edit]- Gunston, Bill.World Encyclopedia of Aero Engines: From the Pioneers to the Present Day.5th edition, Stroud, UK: Sutton, 2006.ISBN0-7509-4479-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.ISBN1-56091-655-9
External links
[edit]
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