Wright R-1300 Cyclone 7


Wright R-1300 Cyclone 7.jpg
Type Radial engine
National origin United States
Manufacturer Wright Aeronautical
First run 1942
Major applications North American 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.[1]

Design and development

The R-1300 is basically 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 AVCO Lycoming.[2]

The engine was used in combat — the R-1300-1A and -1B in the A model North American T-28 Trojan and the R-1300-3, -3A, -3C and -3D in the Sikorsky H-19 Chickasaw. The R-1300-1B was used to power the Ayres Thrush. The R-1300-4 and -4A were used in the N class blimp; 50 of these variants were produced by AVCO.[2]

Early-production engines had vibration problems, an improved lateral dampener in the crank brought about most of the model changes.[2]


A direct drive version of the R-1300-1. It had a 0.5625:1 reduction drive. Both used the PD9F1 carburetor.[2]
Derated to 690.3 hp (515 kW), uses forced-air cooling fan and uses a PD9G1 carburetor.[2]
Similar to the R-1300-1, uses some different accessory components.[2]
With reduction gear for use on fixed wing aircraft.


Specifications (R-1300-1A)

Data from Type Certificate Data Sheet 5E-14.[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: 1,301 cu in (21.3 L)
  • Length: 48.22 in (1,225 mm)
  • Diameter: 55 in (1,397 mm)
  • Dry weight: 1,055 lb (478 kg)



See also

Related development

Related lists


  1. ^ a b Federal Aviation Administration. "Wright Aeronautical Division Curtiss-Wright Corporation - Models: Wright Military Cyclone R-1300 Series T.C. Number: 5E-14". Retrieved 21 March 2018.
  2. ^ a b c d e f USAF Technical Manuals, Parts Breakdown, Overhaul Instructions 1951-1971 T.O. 2R-1300-14

External links

  • Video of an R-1300 engine run on a North American T-28A