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Type: Nine-cylinder single-row supercharged air-cooled radial Manufacturer: Pratt & Whitney |
First run: December 29, 1925 Number built: 34,966 |
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General characteristics Type: 9-cylinder single-row supercharged air-cooled radial engine Bore: 5.75 in (146 mm) Stroke: 5.75 in (146 mm) |
Displacement: 1,344 in³ (22 l) Length: N/A Diameter: 51.75 in (1.314 m) Dry weight: 930 lb (422 kg) |
Components
Valvetrain: Two overhead valves per cylinder
Supercharger: Single-speed centrifugal type
supercharger, 1:10 step-up
Fuel system: Two-barrel Stromberg carburetor
Fuel type: 91 octane rating gasoline
Cooling system: Air-cooled
Reduction gear: 3:2
Performance
Power output:
- 600 hp (447 kW) at 2,250 rpm at 6,200 ft (1,890 m)
Specific power: 0.45 hp/in³ (20.3 kW/L)
Compression ratio: 6:1
Specific fuel consumption: N/A
Power-to-weight ratio: 0.65 hp/lb (1.05 kW/kg)
Variants
R-1340-7 - 450 hp (340 kW), 600 hp (450 kW)
R-1340-8 - 425 hp (317 kW)
R-1340-9 - 450 hp (340 kW), 525 hp (391 kW)
R-1340-16 - 550 hp (410 kW)
R-1340-17 - 525 hp (391 kW)
R-1340-19 - 600 hp (450 kW)
R-1340-19F - 600 hp (450 kW)
R-1340-21G - 550 hp (410 kW)
R-1340-22 - 550 hp (410 kW)
R-1340-23 - 575 hp (429 kW)
R-1340-30 - 550 hp (410 kW)
R-1340-31 - 550 hp (410 kW)
R-1340-33 - 600 hp (450 kW)
R-1340-48 - 600 hp (450 kW)
R-1340-49 - 600 hp (450 kW)
R-1340-AN1 - 550 hp (410 kW)
R-1340-AN2 - 550 hp (410 kW), 3:2 geared prop shaft
R-1340-B - 450 hp (340 kW)
R-1340-D - 500 hp (370 kW)
R-1340-S1D1 - 525 hp (391 kW)
R-1340-S1H1-G - 550 hp (410 kW)
R-1340-S3H1 - 600 hp (450 kW)
R-1340-T1D1 - 520 hp (390 kW)
[Source - Wikipedia]
