Wright R-1300

R-1300
R-1300 in helicopter configuration
Type	Radial engine
National origin	United States
Manufacturer	Wright Aeronautical
First run	1942
Major applications	T-28 Trojan
Developed from	Wright R-2600

The Wright R-1300 Cyclone 7 is an American air-cooled seven-cylinder supercharged radial aircraft engine produced by Curtiss-Wright.

Design and development

The R-1300 is similar to a single row Wright R-2600. The engine was mass produced but not widely used. Engineering began in 1942 but the first flight of an R-1300 did not take place until 1949. The engine was produced under license by Kaiser-Frazer and later by Lycoming.

The engine was used in combat, installed in the North American T-28 Trojan and the Sikorsky UH-19 Chickasaw. It was used in the Ayres Thrush.

For use in helicopters the R-1300-3 was derated to 690.3 hp (515 kW) and uses forced-air cooling.

Applications

• N class blimp
• North American T-28 Trojan
• Rockwell Thrush Commander
• Sikorsky H-19
• Westland Whirlwind

Specifications (R-1300-1A)

Data from Type Certificate Data Sheet 5E-14.

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: 1,301 in (21.3 L)
• Length: 48.22 in (1,225 mm)
• Diameter: 55 in (1,397 mm)
• Dry weight: 1055 lb (478 kg)

Components

• Valvetrain: Two pushrod-actuated valves per cylinder with sodium-cooled exhaust valve
• Supercharger: 1-stage
• Fuel system: Bendix-Stromberg PD9F1 downdraft carburetor with automatic mixture control
• Cooling system: Air-cooled

Performance

• Power output: 800 hp (596 kW)
• Specific power: 0.61 hp/in³ (27.94 kW/L)
• Compression ratio: 6.20:1
• Power-to-weight ratio: 0.76hp/lb (1.25 kW/kg)

See also

Related development

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

Related lists

• List of aircraft engines