Walter Castor

The Walter Castor was a Czechoslovakian seven-cylinder, air-cooled radial engine for powering aircraft that was developed in the late 1920s. The Super Castor was a nine-cylinder development.[1] Castor I has been produced since 1928, Castor II since 1932 and Castor III since 1934.

Walter Castor I (1928)
Castor
Walter Castor III
Type Radial aero engine
National origin Czechoslovakia
Manufacturer Walter Aircraft Engines
First run 1929

Applications
Walter Castor II-Major (1932)

Engines on display

A preserved example of the Walter Castor engine is on display at the following museum:

  • Prague Aviation Museum, Kbely

Specifications (Castor)

Data from Flight.,[2] L'Air 1 December 1929: Les Moteurs Walter[3]

General characteristics

  • Type: 7-cylinder radial piston engine
  • Bore: 135 mm (5.31 in)
  • Stroke: 170 mm (6.69 in)
  • Displacement: 17.033 l (1,039.4 cu in)
  • Dry weight: 248 kg (547 lb)

Components

  • Valvetrain: One intake and one exhaust valve per cylinder
  • Fuel system: Zenith carburettor
  • Fuel type: 50% Petrol, 50% Benzol
  • Cooling system: Air-cooled

Performance

  • Power output: Castor I 180 kW (240 hp) at 1,750 rpm normal; Castor II 190 kW (260 hp) at 1,850 rpm for take-off; Castor III 240 kW (320 hp) at 2,000 rpm
  • Compression ratio: 6:1
  • Specific fuel consumption: 0.302 kg/kW/h (0.496 lb/hp/h) at 0.8 - 0.81 specific gravity
  • Oil consumption: 0.027 kg/kW/h (0.044 lb/hp/h)
  • Power-to-weight ratio: 0.78 kW/kg (0.48 hp/lb)
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See also

Comparable engines

Related lists

References

Notes
  1. Gunston 1989, p. 174.
  2. Flight - The Walter Castor - 14 February 1929 Retrieved: 19 October 2010
  3. "Les Moteurs Walter". L'Air : revue mensuelle : organe de la Ligue nationale populaire de l'aviation (in French) (242): 35. 1 December 1929. Retrieved 14 February 2019.

Bibliography
  • Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
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