Pratt & Whitney R-1535

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The Pratt & Whitney R-1535 Twin Wasp Junior was an engine used in American aircraft in the 1930s. The engine was first introduced in 1932. It was a two-row, 14-cylinder air-cooled radial design. Displacement was 1,535 cubic inches (25.2 liters); bore and stroke were 5-3/16" and 5-3/16" (131.8 mm and 131.8 mm).

Contents 1 Models 2 Specifications (R-1535-13) 3 Aircraft which used R-1535 4 Related contents 5 External link

[edit] Models

• R-1535: 700 hp (521 kW)
• R-1535-13: 825 hp (615 kW)

[edit] Specifications (R-1535-13)

General characteristics

• Type: 14-cylinder air-cooled two-row radial engine
• Bore: 5.1875 in (131.8 mm)
• Stroke: 5.1875 in (131.8 mm)
• Displacement: 1,535 in³ (25.2 L)
• Dry weight:

Components

• Cooling system: Air-cooled

Performance

• Power output: 825 hp (615 kW)
• Specific power: 0.54 hp/in³ (24.4 kW/L)
• Power-to-weight ratio:

[edit] Aircraft which used R-1535

• Hughes H-1 Racer - R-1535
• Northrop A-17 - R-1535-13

[edit] Related contents

• Pratt & Whitney Wasp series
• R-1340 Wasp
• R-985 Wasp Junior
• R-1830 Twin Wasp
• R-2800 Double Wasp
• R-4360 Wasp Major

[edit] External link

http://www.shanaberger.com/engines/R-1535.htm