Pratt & Whitney R-1535
The Pratt & Whitney R-1535 Twin Wasp Junior was an aircraft engine manufactured by the US American manufacturer Pratt & Whitney in 1932. The R-1535 was the first double radial engine (2 × 7 cylinder) from the company's Wasp engine series and was the predecessor of the R-1830 Twin Wasp built in large numbers until 1951 .
The Twin Wasp Junior was an air-cooled 14-cylinder double radial engine with a displacement of 1535 cubic inches (approx. 25.2 liters). Its performance corresponded roughly to that of the 9-cylinder radial engine R-1690 Hornet , from which he a. a. differed by a smaller diameter. However, since it was heavier and more expensive, it found few buyers.
variants
- R-1535: 700 PS (521 kW)
- R-1535-13: 750 PS (559 kW) or 825 PS (615 kW)
- R-1535-SB4-G: 825 PS (615 kW)
Use (selection)
Technical data (R-1535-SB4-G)
- Type: air-cooled two-row radial engine (14 cylinders in two stars), with supercharging ( centrifugal compressor )
- Bore : 5 3 ⁄ 16 inch (131.8 mm)
- Stroke : 5 3 ⁄ 16 inch (131.8 mm)
- Displacement : 1535 cubic inches (25.15 liters)
- Output : 825 PS (615 kW) at 2,625 rpm
- Compression : 6.75: 1
- Length: 1353 mm
- Diameter: 1121 mm
- Weight : 493 kg
See also
Web links
Commons : Pratt & Whitney R-1535 - Collection of Pictures, Videos and Audio Files
