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Gnome Sigma
1900s French aircraft piston engine From Wikipedia, the free encyclopedia
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The Gnome 7Σ Sigma (commonly called the Gnome 60 hp) is a French seven-cylinder, air-cooled rotary aero engine.[1]
The Sigma produced 60 hp (45 kW) from its capacity of 9.5 L (579.73 cu in).
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Specifications (7 Sigma)
Data from Société Des Moteurs Gnome[2]
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[3]
- 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
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See also
Comparable engines
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