Girish Mahajan (Editor)

Gnome Sigma

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The Gnome 7Σ Sigma (commonly called the Gnome 60 hp) is a French seven-cylinder, air-cooled aero engine.

Contents

The Sigma produced 60 hp (45 kW) from its capacity of 9.5 l (579.73 cu in).

Specifications (7 Sigma)

Data from Société Des Moteurs Gnome

General characteristics

  • Type: 7-cylinder, single-row, rotary engine
  • Bore: 120 mm (4.72 in)
  • Stroke: 120 mm (4.72 in)
  • Displacement: 9.5 l (579.73 cu in)
  • Length: 1,125 mm (44.29 in)79 cm (31 in)
  • Diameter: 826 mm (32.52 in)
  • Dry weight: 79 kg (174 lb)

    • Components

  • Valvetrain: pushrod operated overhead exhaust valves plus pressure-driven inlet valves located in the piston crowns
  • Fuel system: a single static Bloctube carburretor feeding the crankcase
  • Fuel type: 40 / 50 octane gasoline
  • Oil system: pressure-fed total loss, castor oil
  • Cooling system: Air-cooled
  • Reduction gear: Direct drive, right-hand tractor, left-hand pusher

    • Performance

  • Power output: 45 kW (60 hp) at 1,200 rpm

    • References

    Gnome Sigma Wikipedia
    (Text) CC BY-SA