Gnome Sigma
| Sigma | |
|---|---|
| Type | Rotary aero engine |
| National origin | France |
| Manufacturer | Société des Moteurs Gnome |
| Unit cost | 13,000Francs |
The Gnome 7Σ Sigma (commonly called the Gnome 60 hp) is a French seven-cylinder, air-cooled aero engine.[1]
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[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
See also
- Comparable engines
- Related lists
References
Notes
National Air and Space Museum - Gnome Omega Retrieved: 11 November 2010.</ref>
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- 1 2 3 National Air and Space Museum - Gnome Omega Retrieved: 11 November 2010.
- ↑ Moteurs Gnome (PDF) (in French). Paris: Société Des Moteurs Gnome. October 1913. pp. 6–10. Retrieved 3 October 2014.
- 1 2 3 4 Nahum, Andrew (1999). The rotary aero engine. London: Science Museum. pp. 12–14. ISBN 1-900747-12-X.
- 1 2 3 Murphy, Justin D. (2005). Military aircraft, origins to 1918 : an illustrated history of their impact. Santa Barbara, Calif. [u.a.]: ABC-CLIO. pp. 32–33. ISBN 1-85109-488-1.
Bibliography
- Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
Further reading
- Moteurs d'Aviation Gnome (PDF) (in French). 49, Rue Lafitte, Paris: Société Des Moteurs Gnome. 1910. Retrieved 2 October 2014.
External links
- Smithsonian/NASM's page on Gnome Omega No.1
- Video of April 2009 ground runup of a restored Gnome Omega in the USA
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