|Gnome 7 Omega on display at the Royal Air Force Museum London|
|Type||Rotary aero engine|
|Manufacturer||Société des Moteurs Gnome|
|Major applications||Blériot XI
|Number built||4,000 until 1914 (more later)|
|Unit cost||£520 in 1909|
The Gnome 7 Omega (commonly called the Gnome 50 hp) is a French seven-cylinder, air-cooled aero engine produced by Gnome et Rhône. It was shown at the Paris Aero Salon held in December 1908 and was first flown in 1909. It was the world's first aviation rotary engine produced in quantity. Its introduction revolutionized the aviation industry and it was used by many early aircraft. It produced 50 horsepower (37 kW) from its capacity of 8 litres (488 cubic inches). A Gnome Omega engine powers the 1912 Blackburn Monoplane, owned and operated by the Shuttleworth Collection, the oldest known airworthy British-designed aeroplane worldwide. A two-row version of the same engine was also produced, known as the Gnome 14 Omega-Omega or Gnome 100 hp. The prototype Omega engine still exists, and is on display at the United States' National Air and Space Museum.
- Gnome 7 Omega
- Single-row 7-cyl. original version; 50 hp (37 kW).
- Gnome 14 Omega-Omega
- Two-row, 14-cylinder version using Omega cylinders; 100 hp (75 kW).
Gnome 7 Omega
Gnome 14 Omega-Omega
- Avro 501
- Bleriot XXIII
- Bristol-Gordon England G.E.2
- Coventry Ordnance Works Biplane 10
- Nieuport IV.H floatplane
- Short S.41 Tractor Biplane
- Short S.57 Seaplane
- Short S.64 Folder Seaplane
- Short Admiralty Type 74
Engines on display
- The very first Gnome rotary engine ever built, Gnôme Omega No. 1, is on display at the National Air and Space Museum, Washington, D.C.
- A preserved production Gnome 7 Omega engine is on public display at the Royal Air Force Museum London.
- A restored Omega is on display at the New England Air Museum, Windsor Locks, CT.
Specifications (7 Omega)
Data from Lumsden.
- Type: 7-cylinder, single-row, rotary engine
- Bore: 110 mm (4.3 in)
- Stroke: 120 mm (4.7 in)
- Displacement: 8 L (488.5 cu in)
- Length: 79 cm (31 in)
- Diameter: 84 cm (33 in)
- Dry weight: 75 kg (165 lb)
- Valvetrain: pressure-driven inlet valves were located on the pistons
- Oil system: Total loss, castor oil
- Cooling system: Air-cooled
- Reduction gear: Direct drive, right-hand tractor, left-hand pusher
- Power output: 37 kW (50 hp) at 1,200 rpm
- Comparable engines
- Related lists
- Nahum, Andrew (1999). The rotary aero engine. London: Science Museum. pp. 12–14. ISBN 1-900747-12-X.
- National Air and Space Museum - Gnome Omega Retrieved: 11 November 2010.
- 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.
- Lumsden 2003, p. 152.
- Shuttleworth Collection - Blackburn Monoplane Retrieved: 5 November 2010.
- "Gnome Omega No. 1 Rotary Engine". Smithsonian Institution. Retrieved 14 April 2012.
- Moteurs d'Aviation Gnome (PDF) (in French). 49, Rue Lafitte, Paris: Société Des Moteurs Gnome. 1910. Retrieved 2 October 2014.
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