Wright R-1300

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The Wright R-1300 Cyclone 7 was an US aircooled 7-cylinder supercharged radial engine produced by Curtiss-Wright.

The R-1300 is more or less a single row Wright R-2600. The engine was in mass production but not widely used. Engineering begun in 1942 but the first flight of an R-1300 did not take place until 1949. The engine was produced in license at Kaiser-Frazer and, later, at Lycoming

The engine saw action in the North American T-28 A Trojan and the Sikorsky UH-19 Chickasaw. Furthermore it was used in the Ayres Thrush.

For use in helicopters the R-1300-3 was derated to 515 kW and uses forced cooling.

[edit] Specifications (R-1300-1)

General characteristics

• Type: 7-cylinder supercharged air-cooled single row radial engine
• Bore: 6.125 in (155.6 mm)
• Stroke: 6.312 in (160.2 mm)
• Displacement: 1,302 in³ (21.3 L)
• Length: 1225 mm
• Diameter: 55 in (1,397 mm)
• Dry weight: 461 kg

Components

• Valvetrain: Two pushrod-actuated valves per cylinder with sodium-cooled exhaust valve
• Supercharger: 1-stage
• Fuel system: Stromberg PR48A downdraft carburetor with automatic mixture control
• Cooling system: Air-cooled

Performance

• Power output: 800 hp (596 kW)
• Specific power:
• Compression ratio: 6.9:1
• Power-to-weight ratio:

[edit] Related contents

• Wright Cyclone family
• Wright R-1820 Cyclone 9
• Wright R-2600 Cyclone 14
• Wright R-3350 Cyclone 18 (Duplex Cyclone)