Kinner C-5

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Type Radial engine
Manufacturer Kinner Airplane & Motor Corporation
Developed from Kinner R-5

The Kinner C-5 was an American five cylinder radial engine for small general and sport aircraft of the 1930s.

Design and development[edit]

The C-5 was a development of the earlier R-5 with greater power and dimensions. The main change was the increase in cylinder bore from 128 mm (5.0 in) to 143 mm (5.625 in) and an increase in cylinder stroke from 140 mm (5.5 in) to 145 mm (5.75 in). This led to a corresponding increase in displacement from 8.85 liters (540 cu in) to 11.71 liters (715 cu in).

The U.S. military designation was R-720.


Consolidated YPT-11B
Kellett K-3
Kinner P
Stearman YPT-9C
Verville YPT-10D
Waco OSO
Waco OEC
Waco ODC
Waco OBF


data from [1]

General characteristics

  • Type: 5-cylinder air cooled radial
  • Bore: 5.625 in (143 mm)
  • Stroke: 5.75 in (145 mm)
  • Displacement: 715 cu in (11.71 liters)
  • Length: 34.8in (884 mm)
  • Diameter: 50 in (1,270 mm)
  • Dry weight: (dry) 420 lb (190 kg)


  • Valvetrain: 1 inlet and 1 exhaust valve per cylinder
  • Fuel system: 1 Stromberg carburetor
  • Fuel type: 73 octane
  • Cooling system: Air


See also[edit]

Related lists


  1. ^ Grey 1974, pp. 88d
  • Grey, C.G. (1972). Jane's All the World's Aircraft 1938. London: David & Charles. pp. 88d. ISBN 0-7153-5734-4.