|The Sopwith Tabloid replica on display at the Royal Air Force Museum is fitted with an original Gnome 7 Lambda[clarification needed] engine.|
|Type||Rotary aero engine|
|Manufacturer||Gnome et Rhone|
|Major applications||Avro 504
|Number built||979 (British production)|
The Gnome 7 Lambda was a French designed, seven-cylinder, air-cooled rotary aero engine that was produced under license in Britain and Germany. Powering several World War I era aircraft types it was claimed to produce 80 horsepower (60 kW) from its capacity of 12 litres (720 cubic inches) although recorded figures are lower.
In Germany Motorenfabrik Oberursel license-built the seven-cylinder engine as the Oberursel U.0 and later copied the 14-cylinder design and designated it as the Oberursel U.III.
- Gnome 7 Lambda
- Seven-cylinder, single-row rotary engine.
- Gnome 7 Lambda (long stroke)
- Increased stroke of 145 mm (5.7 in) to raise the compression ratio to 3.87:1, and total displacement to 12.26 litres.
- Gnome 14 Lambda-Lambda
- 14-cylinder, two-row rotary engine using Lambda cylinders. 160 hp (120 kW).
- Motorenfabrik Oberursel U.0
- German production of the Gnome 7 Lambda - had a 124mm cylinder bore and 140mm piston stroke for a total displacement of 11.52 litres, external diameter of 1.020 meters.
List from Lumsden
Gnome 7 Lambda
Gnome 14 Lambda-Lambda
- Avro 510
- Royal Aircraft Factory S.E.4
- Deperdussin Monocoque
- Short S.63
- Short S.64
- Short S.70
- Short S.74
- Short S.80
- Short S.81
- Short S.82
Specifications (Gnome 7 Lambda)
Data from Lumsden.
- Type: 7-cylinder, single-row, rotary engine
- Bore: 124 mm (4.9 in)
- Stroke: 140 mm (5.5 in)
- Displacement: 11.8 L (721.2 cu in)
- Length: 112 cm (44 in)
- Diameter: 93 cm (36.6 in)
- Dry weight: 96 kg (212 lb)
- Valvetrain: Automatic centre-piston inlet valve, overhead exhaust valve (one each per cylinder)
- Cooling system: Air-cooled
- Reduction gear: Direct drive, right-hand tractor, left-hand pusher
- Power output: 50.3 kW (67.5 hp) at 1,250 rpm (maximum power)
- Compression ratio: 3.75:1
- Comparable engines
- Related lists
|Wikimedia Commons has media related to Gnome et Rhône.|
- Lumsden 2003, p. 151.
- "Obsah fóra :: Zbraně a vybavení :: Výzbroj, zbraňové systémy, vybavení a příslušenství :: Motory :: Letecké motory :: Pístové :: Německo (DEU) :: Oberursel U.0". valka.cz (in Czech). Retrieved July 19, 2013.
- "The Borel Hydro-Monoplane". Flight: 450. 19 July 1913.
- RAF Museum - Sopwith Tabloid replica history Retrieved: 11 November 2010.
- Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.