Walter NZ 120

1920s Czech piston aircraft engine
NZ 120
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. It was 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]

Applications

  • Avia B.122
  • Breda Ba.26
  • Fizir FN
  • Junkers K 16
  • Letov Š-218
  • Praga BH-39NZ
  • RWD 8

Specifications

General characteristics

  • Type: Nine-cylinder radial piston engine
  • Bore: 105 mm (4.134 in)
  • Stroke: 120 mm (4.724 in)
  • Displacement: 9.352 L (570.7 cu in)
  • Dry weight: 148 kg (326 lb)

Components

  • Valvetrain: Overhead valve, two poppet valves per cylinder
  • Cooling system: Air-cooled
  • Reduction gear: Direct drive

Performance

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

See also

Related development

  • Walter NZ 60

Related lists

References

Wikimedia Commons has media related to Walter NZ-120.
Notes
  1. ^ Gunston 1989, p. 174.
Bibliography
  • Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
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