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. Air-cooled designs are far simpler than their liquid-cooled ...

rotary

aero engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Aircraft using power components are referred to as powered flight. Most aircraft engines are either piston engines or gas turbin ...

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

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

-era aircraft types it was claimed to produce from its

capacity Capacity or capacities may refer to: Mathematics, science, and engineering * Capacity of a container, closely related to the volume of the container * Capacity of a set, in Euclidean space, the total charge a set can hold while maintaining a giv ...

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 ( ), before 1910 known as the Daimler Motor Company Limited, was an independent British motor vehicle manufacturer founded in London by Harry John Lawson, H. J. Lawson in 1896, which set up its manufacturing bas ...

Coventry Coventry ( or rarely ) is a City status in the United Kingdom, cathedral city and metropolitan borough in the West Midlands (county), West Midlands county, in England, on the River Sherbourne. Coventry had been a large settlement for centurie ...

. 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 Stroke is a medical condition in which poor cerebral circulation, blood flow to a part of the brain causes cell death. There are two main types of stroke: brain ischemia, ischemic, due to lack of blood flow, and intracranial hemorrhage, hemor ...

of to raise the

compression ratio The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine. A fundamental specification for such engines, it can be measured in two different ways. Th ...

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 is a single-engine biplane bomber made by the Avro, Avro aircraft company and under licence by others. Production during World War I totalled 8,970 and continued for almost 20 years, making it the most-produced aircraft of any kind ...

Blackburn Type I The Blackburn Type I was a single-engine civil two-seat monoplane built in the United Kingdom in 1913 by the Blackburn Aeroplane & Motor Company, Blackburn Aeroplane Company. Three were produced and used for flying demonstrations and Trainer ( ...

* Borel hydro-monoplane *

Blériot Parasol Blériot may refer to: * Louis Blériot, a French aviation pioneer * Blériot Aéronautique, an aircraft manufacturer founded by Louis Blériot * Blériot-Whippet, a car * Bleriot (moonlet), a propeller moonlet in Saturn's A Ring * 11248 Blériot E ...

Blériot XI The Blériot XI is a French aircraft from the Aviation in the pioneer era, 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. ...

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 ...

* 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 The 1910 Deperdussin monoplane was the first aircraft to be built in significant quantities by Société Pour L'Aviation et ses Dérivés, Aéroplanes Deperdussin. The type was produced in a number of variants which were flown successfully in Air ...

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 ...

* Farman HF.14 * Farman HF.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 The Nieuport 10 (or Nieuport XB in contemporary sources) is a French First World War sesquiplane that filled a wide variety of roles, including reconnaissance, fighter and trainer. Design and development In January 1914, designer joined the '' ...

* Nieuport-Macchi Parasol * Radley-England Waterplane * Royal Aircraft Factory B.E.3 *

Royal Aircraft Factory B.E.4 The Royal Aircraft Factory B.E.3 was a single-engined rotary engined biplane developed by the British Royal Aircraft Factory prior to the First World War. The B.E.4 and B.E.7 were virtually identical aircraft that differed only in the engine fit ...

* Royal Aircraft Factory B.E.8 * Royal Aircraft Factory B.S.1 * Royal Aircraft Factory S.E.2 * Royal Aircraft Factory S.E.2 * Royal Aircraft Factory S.E.4 * Short S.37 * Short S.38 *

Short S.41 The Short S.41 was a British single-engined biplane built for the Royal Navy in 1912. Capable of being operated either on wheels or floats, it was successful enough for a further two similar aircraft to be built, with the type remaining in use ...

* Short S.60 * Short S.70 *

Sikorsky S-7 The Sikorsky S-7 was a Russian single engine experimental prototype aircraft built by the Russo-Balt, Russian Baltic Railroad Car Works shortly after Igor Sikorsky became chief engineer of the aircraft manufacturing division. Design and develop ...

* 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 characteristi ...

* 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 *

Vickers No.8 Monoplane The Vickers R.E.P. Type Monoplanes were a series of single-engined monoplane aircraft built by Vickers prior to the outbreak of the First World War. They were developed from a French design for which Vickers had purchased a license, with eight b ...

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 ...

Farman HF.19 The Henry Farman HF.19 was a French reconnaissance seaplane developed by Henry Farman before World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global confli ...

Fokker D.III The Fokker D.III (Fokker designation M.19) was a German single-seat fighter aircraft of World War I. It saw limited frontline service before being withdrawn from combat in December 1916. Design and development The M.19 began as an effort to imp ...

* Fokker E.IV * Paul Schmitt P.S.3 * Short S.63 * Short S.64 * Short S.70 * Short S.74 * 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 aircra ...

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, in North London's Borough of Barnet. It includes five buildings and hangars showing the history of aviation and the Royal Air ...

.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 (; uppercase , lowercase ; , ''lám(b)da'') is the eleventh 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 Phoen ...

Rotary aircraft piston engines