Walter NZ 120

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 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

Specifications

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)

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

References

Wikimedia Commons has media related to Walter NZ-120.

Notes

↑ Gunston 1989, p. 174.

Bibliography

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

Walter aircraft engines

Engines	Atlas M208

Opposed engines	Atom M202

Inline engines	M 332 M 337 Junior Major Mikron Minor

V-12 engines	Sagitta

Radial engines	NZ 40 NZ 60 NZ 85 NZ 120 Bora Castor Gemma Jupiter Mars I Mars Merkur Pegas Polaris Pollux Regulus Scolar Super Castor Vega Venus

Turbojets	M05 M06 M701

Turboprops	H80 M601 M602

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