Norton NR642
{{Short description|British wankel engine for aircraft }}
{{Use dmy dates|date=June 2024}}
{{Use British English|date=June 2024}}
| {{Infobox aircraft begin
| name=NR642 | image= | caption= }}{{Infobox Aircraft Engine |type=Aircraft engine |manufacturer=Norton Motorcycle Company |designer= |national origin=United Kingdom |first run= |major applications= |produced= |number built= |developed from= |variants with their own articles= }} |
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.Lambert 1991, p.709
Design and development
The NR642 is a twin-rotor Wankel engine. It is a {{convert|588|cc|cuin|1|abbr=on}} displacementMoll 1989, p.20 petrol engine design, with a heavy-duty 2.94:1 reduction gearbox. Cooling is provided by a fan for the rotors, plus liquid cooling for the housing. It was designed to meet JAR-E and FAR 23 regulatory requirements. Norton aimed for 1,500 hours running time between overhauls but was initially specifying 200-300 hours.
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"."Rotary Power by Norton Motors", p.20
Applications
Specifications
{{pistonspecs|
|ref=Lambert 1991, p.709
|type=Two rotor Wankel aircraft engine
|bore=
|stroke=
|displacement={{convert|588|cc|cuin|1|abbr=on}}
|length={{convert|702|mm|in|1|abbr=on}}
|diameter=
|width={{convert|457|mm|in|1|abbr=on}}
|height={{convert|444|mm|in|1|abbr=on}}
|weight={{convert|64|kg|lb|1|abbr=on}}
|valvetrain=
|supercharger=
|turbocharger=
|fuelsystem=
|fueltype=petrol
|oilsystem=
|coolingsystem=air-cooled rotors, liquid-cooled housing
|power={{convert|90|hp|kW|0|abbr=on}}
|specpower=
|compression=
|fuelcon={{convert|5.2|gal|L|1|abbr=on}}/hour
|specfuelcon={{convert|0.50|lb|kg|1|abbr=on}}/hp at 70% power
{{convert|0.55|lb|kg|1|abbr=on}}/hp at full power
|oilcon=
|power/weight=
|designer=
|general_other=
|components_other=
|performance_other=
}}
See also
References
{{Reflist}}
- {{cite book |title=Jane's All the World's Aircraft 1991-92 |editor1-last=Lambert |editor1-first=Mark |editor2-last=Munson |editor2-first=Kenneth |editor3-last=Taylor |editor3-first=Michael J.H. |date=1991 |publisher=Jane's Information Group |location=Coulson, Surrey, UK |edition=82nd }}
- {{cite magazine |title=Rotary-Mill Renaissance |last=Mill |first=Nigel |date=April 1989 |magazine=Flying |volume=116 |number=12 |publisher=Diamandis Communications |location=New York }}
- {{cite magazine |title=Rotary Power by Norton Motors |date=December 1989 |magazine=Flying |volume=116 |number=3 |publisher=Diamandis Communications |location=New York }}