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Norton NR642

From Wikipedia, the free encyclopedia

NR642
Type Aircraft engine
National origin United Kingdom
Manufacturer Norton Motorcycle Company

The Norton NR642 (Originally the Aerotor 90) is a British aircraft engine that was designed and produced by Norton Motorcycle Company in the 1990s for use in light aircraft (particularly by amateur constructors) and UAVs.[1]

Design and development

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The NR642 is a twin-rotor Wankel engine.[1] It is a 588 cc (35.9 cu in) displacement[2] petrol engine design, with a heavy-duty[1] 2.94:1[2] reduction gearbox. Cooling is provided by a fan for the rotors, plus liquid cooling for the housing.[1][2] It was designed to meet JAR-E[2] and FAR 23 regulatory requirements.[1] Norton aimed for 1,500 hours running time between overhauls but was initially specifying 200-300 hours.[2]

The NR642 first flew in late 1989, with two units installed on a Rutan Long-EZ to create what its builder called a "Twin EZ".[3]

Applications

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Specifications

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Data from Lambert 1991, p.709

General characteristics

  • Type: Two rotor Wankel aircraft engine
  • Displacement: 588 cc (35.9 cu in)[2]
  • Length: 702 mm (27.6 in)
  • Width: 457 mm (18.0 in)
  • Height: 444 mm (17.5 in)
  • Dry weight: 64 kg (141.1 lb)

Components

  • Fuel type: petrol
  • Cooling system: air-cooled rotors, liquid-cooled housing
  • Reduction gear: 2.94:1[2]

Performance

  • Power output: 90 hp (67 kW)
  • Fuel consumption: 5.2 US gal (19.7 L)/hour[2]
  • Specific fuel consumption: 0.50 lb (0.2 kg)/hp at 70% power[2]
    0.55 lb (0.2 kg)/hp at full power[3]

See also

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Related lists

References

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  1. ^ a b c d e Lambert 1991, p.709
  2. ^ a b c d e f g h i Moll 1989, p.20
  3. ^ a b "Rotary Power by Norton Motors", p.20
  • Lambert, Mark; Munson, Kenneth; Taylor, Michael J.H., eds. (1991). Jane's All the World's Aircraft 1991-92 (82nd ed.). Coulson, Surrey, UK: Jane's Information Group.
  • Mill, Nigel (April 1989). "Rotary-Mill Renaissance". Flying. Vol. 116, no. 12. New York: Diamandis Communications.
  • "Rotary Power by Norton Motors". Flying. Vol. 116, no. 3. New York: Diamandis Communications. December 1989.