Clerget 7Z

The Clerget 7Z was a seven-cylinder rotary aircraft engine of the World War I era designed by Pierre Clerget. First appearing in 1911 it was nominally rated at 80 horsepower (60 kW). 347 examples were jointly built in Britain by Gordon Watney & Co Ltd of Weybridge and Gwynnes Limited of Hammersmith.[1]

7Z
Type Rotary engine
National origin France
Manufacturer Clerget-Blin
First run 1911
Major applications Avro 504
Number built 347 (British production)

Applications

Specifications (Clerget 7Z)

Data from Lumsden and Gunston.[1][2][3]

General characteristics

Components

  • Valvetrain: 1 each overhead inlet and exhaust valves operated by pushrods and rockers
  • Fuel system: Bloctube carburettor
  • Fuel type: Gasoline with Castor oil lubricant
  • Oil system: Castor oil mixed with fuel
  • Cooling system: Air-cooled

Performance

  • Power output: 70.84 kW (95 hp) at 1,300 rpm (maximum power)
  • Specific power: 0.1314 hp/cu in (5.98 kW/l)
  • Compression ratio: 4.3:1
  • Specific fuel consumption: 0.564 l/kW/hour(0.74 pt/hp/hour)
  • Oil consumption: 0.0762 l/kW/hour (0.1 pt/hp/hour)
  • Power-to-weight ratio: 0.67 kW/kg (0.406 hp/lb)
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See also

Comparable engines

Related lists

References

Notes
  1. Lumsden 2003, p. 133.
  2. Gunston 1989, p, 41.
  3. Grey, C.G. (1969). Jane's All the World's Aircraft 1919 (Facsimile ed.). David & Charles (Publishing) Limited. pp. 1b to 145b. ISBN 978-0-7153-4647-1.

Bibliography
  • Grey, C.G. (1969). Jane's All the World's Aircraft 1919 (Facsimile ed.). David & Charles (Publishing) Limited. pp. 1b to 145b. ISBN 978-0-7153-4647-1.
  • Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
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