The Gnome 7 Lambda was a French designed, seven-cylinder,

air-cooled Air-cooled engines rely on the circulation of air directly over heat dissipation fins or hot areas of the engine to cool them in order to keep the engine within operating temperatures. In all combustion engines, a great percentage of the heat ge ...

rotary aero engine that was produced under license in Britain and Germany. Powering several

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

-era aircraft types it was claimed to produce from its capacity of although recorded figures are lower.Lumsden 2003, p. 151. Just under 1,000 units were produced in Britain, the majority (967) by the

Daimler Company The Daimler Company Limited ( ), prior to 1910 The Daimler Motor Company Limited, was an independent British motor vehicle manufacturer founded in London by H. J. Lawson in 1896, which set up its manufacturing base in Coventry. The compan ...

Coventry Coventry ( or ) is a city in the West Midlands, England. It is on the River Sherbourne. Coventry has been a large settlement for centuries, although it was not founded and given its city status until the Middle Ages. The city is governed b ...

. A 14-cylinder variant was known as the Gnome 14 Lambda-Lambda. In Germany

Motorenfabrik Oberursel Motorenfabrik Oberursel A.G. was a German manufacturer of automobile, locomotive and aircraft engines situated in Oberursel (Taunus), near Frankfurt (Main), Germany. During World War I it supplied a major 100 hp-class rotary engine that was u ...

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.

Variants

;Gnome 7 Lambda :Seven-cylinder, single-row rotary engine. ;Gnome 7 Lambda (long stroke) :Increased stroke of to raise the compression ratio to 3.87:1, and total displacement to . ;Gnome 14 Double Lambda :14-cylinder, two-row rotary engine using Lambda cylinders. . ;Motorenfabrik Oberursel U.0 :German production of the Gnome 7 Lambda – had a cylinder bore and piston stroke for a total displacement of , external diameter of . ;Motorenfabrik Oberursel U.III: :German production of the Gnome 14 Double Lambda

Applications

''List from Lumsden'' Sopwith Tabloid RAFM

Gnome 7 Lambda

Avro 504 The Avro 504 was a First World War biplane aircraft made by the Avro aircraft company and under licence by others. Production during the war totalled 8,970 and continued for almost 20 years, making it the most-produced aircraft of any kind tha ...

Blackburn Type I The Blackburn Type I was a single-engine civil two-seat monoplane built in the United Kingdom in 1913. Three were produced and used for flying demonstrations and training including seaplane pilotage. Development The first Type I was built to ...

* Borel hydro-monoplane * Blériot Parasol *

Blériot XI The Blériot XI is a French aircraft of the pioneer era of aviation. The first example was used by Louis Blériot to make the first flight across the English Channel in a heavier-than-air aircraft, on 25 July 1909. This is one of the most fa ...

Bristol Boxkite The Boxkite (officially the Bristol Biplane) was the first aircraft produced by the British and Colonial Aeroplane Company (later known as the Bristol Aeroplane Company). A pusher biplane based on the successful Farman III, it was one of the fi ...

* Bristol Gordon England G.E.3 * Bristol-Coanda Monoplanes * Bristol Coanda T.B.8 * Bristol Coanda P.B.8 *

Bristol Scout The Bristol Scout was a single-seat rotary-engined biplane originally designed as a racing aircraft. Like similar fast, light aircraft of the period it was used by the RNAS and the RFC as a " scout", or fast reconnaissance type. It was one o ...

* Caudron G.III * Deperdussin Type B *

Dunne D.8 The Dunne D.8 of 1912 was a tailless swept wing biplane, designed by J. W. Dunne to have inherent stability. One example was supplied to RAE Farnborough. License-built Burgess-Dunne models were used by the US Signal Corps and United States ...

* Henry Farman F.20 *

Grahame-White Type XV The Grahame White Type XV was a military trainer biplane produced in the United Kingdom before and during World War I. It is often referred to as the Box-kite, although this name more properly describes the Grahame-White Type XII, an earlier a ...

* London & Provincial 4 * Lowe Marlburian * Nieuport IVG * Nieuport 10 * Nieuport-Macchi Parasol * Radley-England Waterplane * Royal Aircraft Factory B.E.3 * Royal Aircraft Factory B.E.4 * Royal Aircraft Factory B.E.8 * Royal Aircraft Factory B.S.1 *

Royal Aircraft Factory S.E.2 The Royal Aircraft Factory S.E.2 (Scout Experimental) was an early British single-seat scout aircraft. Designed and built at the Royal Aircraft Factory in 1912–13 as the B.S.1, the prototype was rebuilt several times before serving with the R ...

* Royal Aircraft Factory S.E.4 * Short S.37 * Short S.38 * Short S.41 * Short S.60 * Short S.70 * Sikorsky S-7 * Sopwith Gordon Bennett Racer *

Sopwith Pup The Sopwith Pup is a British single-seater biplane fighter aircraft built by the Sopwith Aviation Company. It entered service with the Royal Naval Air Service and the Royal Flying Corps in the autumn of 1916. With pleasant flying character ...

* Sopwith Sociable *

Sopwith Tabloid The Sopwith Tabloid and Sopwith Schneider (floatplane) were British biplanes, originally designed as sports aircraft and later adapted for military use. They were among the first successful types to be built by the Sopwith Aviation Company. The ...

Sopwith Three-Seater The Sopwith Three-seater was a British aircraft designed and built prior to the start of the First World War. One of the first aircraft built by the Sopwith Aviation Company, it was operated by both the Royal Naval Air Service (RNAS) and the Ro ...

* Vickers No.8 Monoplane

Gnome 14 Lambda-Lambda

* Avro 510 * Royal Aircraft Factory S.E.4 *

Deperdussin Monocoque The Deperdussin Monocoque was an early racing aircraft built in 1912 by the Aéroplanes Deperdussin, a French aircraft manufacturer started in 1911 and reorganized as the Société Pour L'Aviation et ses Dérivés ( SPAD) in 1913. It is so nam ...

* Fokker D.III * Fokker E.IV * Paul Schmitt P.S.3 * Short S.63 * Short S.64 * Short S.70 *

Short S.74 The Short Admiralty Type 74 was a single-engined biplane tractor seaplane with non-folding wings, which saw service with the Royal Naval Air Service during the First World War. Design and development The Type 74 incorporated some of the inno ...

* Short S.80 * Short S.81 * Short S.82

Survivors

An original Gnome 7 Lambda engine is installed in the

replica aircraft on display in the

Grahame-White Grahame-White was an early British aircraft manufacturer, flying school and later manufacturer of cyclecars. The company was established as ''Grahame-White Aviation Company'' by Claude Grahame-White at Hendon in 1911. The firm built mostly aircr ...

hall of the

Royal Air Force Museum London The Royal Air Force Museum London (also commonly known as the RAF Museum) is located on the former Hendon Aerodrome. It includes five buildings and hangars showing the history of aviation and the Royal Air Force. It is part of the Royal Air Fo ...

.RAF Museum – Sopwith Tabloid replica history
Retrieved: 11 November 2010.

Specifications (Gnome 7 Lambda)

References

Notes

Bibliography

* Lumsden, Alec. ''British Piston Engines and their Aircraft''. Marlborough, Wiltshire: Airlife Publishing, 2003. . {{Oberursel aeroengines Air-cooled aircraft piston engines 1910s aircraft piston engines

Lambda Lambda (}, ''lám(b)da'') is the 11th letter of the Greek alphabet, representing the voiced alveolar lateral approximant . In the system of Greek numerals, lambda has a value of 30. Lambda is derived from the Phoenician Lamed . Lambda gave ri ...

Rotary aircraft piston engines