Norton NR642
| 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
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
Specifications
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
Related lists
References
- 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.