Walter NZ 120

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NZ 120
Walter NZ-120 Keski-Suomen ilmailumuseoLoRes2.JPG
Walter NZ 120 on display at the Aviation Museum of Central Finland
Type Radial aero engine
National origin Czechoslovakia
Manufacturer Walter Aircraft Engines
First run 1920s

The Walter NZ 120 was a nine-cylinder, air-cooled, radial engine for aircraft use built in Czechoslovakia by Walter Aircraft Engines in the 1920s. Using common cylinders and parts from the NZ (Novák-Zeithammer) range of engines the NZ 120 produced up to 135 horsepower (99 kW).[1]



General characteristics

  • Type: Nine-cylinder radial piston engine
  • Bore: 105 mm (4.1 in)
  • Stroke: 120 mm (4.7 in)
  • Displacement: 9.36 L (571.2 cu in)
  • Dry weight: 148 kg (326 lb)



  • Power output: 99.3 kW (135 hp) at 1,750 rpm (take-off power)
  • Compression ratio: 4.48:1

See also[edit]

Related development
Related lists


  1. ^ Gunston 1989, p. 174.
  • Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9