Walter Mars

The Walter Mars was a Czechoslovakian 14-cylinder, air-cooled radial engine for powering aircraft, a licensed built Gnome-Rhône 14M.[1]

Walter Mars 14 M
Type Radial aero engine
National origin Czechoslovakia
Manufacturer Walter Aircraft Engines


Engines on display

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

Specifications (Mars)

Data from Letectvi, 1937.[2]

General characteristics

  • Type: 14-cylinder two-row radial piston engine
  • Bore: 122 mm (4.8 in)
  • Stroke: 116 mm (4.6 in)
  • Displacement: 18.98 l (1,158 cu in)
  • Length: 1,282 mm (50.5 in)
  • Diameter: 964 mm (38.0 in)
  • Dry weight: 420 kg (930 lb)


  • Valvetrain: One intake and one exhaust valve per cylinder
  • Fuel system: Carburettor
  • Fuel type: Petrol
  • Cooling system: Air-cooled


See also

Related lists


  1. Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2nd ed.). Cambridge, England: Patrick Stephens Limited. p. 174. ISBN 978-1-85260-163-8.
  2. Letectvi 1937, Volume 17 (in Czech) Retrieved: 30 September 2019
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