Pratt & Whitney R-1690
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The Pratt & Whitney R-1690 Hornet was an engine widely used in American aircraft from the 1920s through 1940s. It was a single-row, 9-cylinder air-cooled radial design. Displacement was 1,690 cubic inches (27.7 L). The BMW 132 was an improved version of this engine.
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[edit] Models
A turbocharged version was available.
[edit] Aircraft
- Keystone B-3
- Lockheed Lodestar C-56A, C-56B, C-56C, C-56D, C-56E, C-59/Mk 1a
- Martin B-10 XB-14
- Sikorsky S-42
[edit] Specifications (R-1690)
General characteristics
- Type: 9-cylinder air-cooled radial engine
- Bore: 6.125 inch (circa 155,575 mm)
- Stroke: 6.375 inch (circa 161,925 mm)
- Displacement: 1,690 in³ (27.703 L)
- Dry weight:
Components
- Valvetrain: OHV
- Supercharger: yes
- Turbocharger: no
- Fuel type: petrol (U.S. term gasoline)
- Cooling system: Air-cooled
Performance
- Power output:
- Specific power:
- Power-to-weight ratio:
[edit] External link
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