NZ 85
NZ 85 on display at the National Technical Museum (Prague)
Type Radial aero engine
National origin Czechoslovakia
Manufacturer Walter Aircraft Engines
First run 1926
Number built 50
Developed from Walter NZ 60
Developed into Walter Venus

The Walter NZ 85 was a seven-cylinder, air-cooled, radial engine for aircraft use built in Czechoslovakia by Walter Aircraft Engines in the late-1920s.

Design and development

Using common cylinders and parts from the earlier Walter NZ 60 (Novák-Zeithammer) engine the NZ 85 and the nine-cylinder NZ 120 were designed together.[1] Lightened and tuned developments were known as the NZ 90 and NZ 95.

Applications

Specifications (NZ 85)

Data from Němeček.[2]

General characteristics

  • Type: Seven-cylinder radial piston engine
  • Bore: 105 mm (4.13 in)
  • Stroke: 120 mm (4.72 in)
  • Displacement: 7.27 L (444 cu in)
  • Length: 741 mm (29.2 in)
  • Diameter: 990 mm (39.0 in)
  • Dry weight: 125 kg (276 lb)

Components

  • Fuel system: Zenith carburettor
  • Cooling system: Air-cooled

Performance

  • Power output: 74 kW (99 hp)

See also

Comparable engines

Related lists

References

Wikimedia Commons has media related to Walter NZ-85.
  1. ↑ Gunston 1989, p. 174.
  2. ↑ Němeček 1983
  • Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
  • Němeček, Václav. Československá letadla I (1918-1945) (Czechoslovak Aircraft I (1918-1945)). Third edition, Naše vojsko, Prague. 1983.
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