Supriya Ghosh (Editor)

Clerget 7Z

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Manufacturer
  
Clerget-Blin

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.

Contents

Applications

  • Avro 504
  • Beardmore W.B.III
  • Bristol Scout
  • Grahame-White 20
  • Royal Aircraft Factory B.E.8
  • Royal Aircraft Factory S.E.2
  • Royal Aircraft Factory S.E.4
  • Sopwith Pup

    • Specifications (Clerget 7Z)

    Data from Lumsden and Gunston.

    General characteristics

  • Type: Seven-cylinder air-cooled rotary engine
  • Bore: 120 mm (4.72 in)
  • Stroke: 150 mm (5.91 in)
  • Displacement: 11.88 l (724.96 cu in)
  • Diameter: 914 mm (35.98 in)
  • Dry weight: 106 kg (234 lb)

    • 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)

    • References

    Clerget 7Z Wikipedia
    (Text) CC BY-SA