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Gnome Lambda

November 23, 2023

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 (730 cubic inches) although recorded figures are lower.[1]

Lambda
Gnome 7 Lambda as shown in a 1913 Gnome catalog
Type Rotary aero engine
Manufacturer Gnome et Rhône
First run c.1911
Major applications Avro 504
Bristol Boxkite
Bristol Scout
Number built 979 (British production)

Just under 1,000 units were produced in Britain, the majority (967) by the Daimler Company of Coventry. A 14-cylinder variant was known as the Gnome 14 Lambda-Lambda.

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.

Variants edit

Gnome 7 Lambda
Seven-cylinder, single-row rotary engine.
Gnome 7 Lambda (long stroke)
Increased stroke of 145 mm (5.71 in) to raise the compression ratio to 3.87:1, and total displacement to 12.26 litres (748 cu in).
Gnome 14 Double 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 124 mm (4.88 in) cylinder bore and 140 mm (5.51 in) piston stroke for a total displacement of 11.52 litres (703 cu in), external diameter of 1.020 metres (40.16 in).[2]
Motorenfabrik Oberursel U.III
:German production of the Gnome 14 Double Lambda

Applications edit

List from Lumsden

 
The Sopwith Tabloid replica on display at the Royal Air Force Museum is fitted with an original Gnome 7 Lambda[clarification needed] engine.

Gnome 7 Lambda edit

Gnome 14 Lambda-Lambda edit

Survivors edit

An original Gnome 7 Lambda engine is installed in the Sopwith Tabloid replica aircraft on display in the Grahame-White hall of the Royal Air Force Museum London.[4]

Specifications (Gnome 7 Lambda) edit

 
Oberursel U.III, a copy of the 14-cylinder Gnome Lambda-Lambda

Data from Lumsden.[1]

General characteristics

Components

  • 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

Performance

See also edit

Comparable engines

Related lists

References edit

 
Wikimedia Commons has media related to Gnome Lambda and Gnome Lambda-Lambda.

Notes edit

  1. ^ a b Lumsden 2003, p. 151.
  2. ^ "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.
  3. ^ "The Borel Hydro-Monoplane". Flight: 450. 19 July 1913.
  4. ^ Retrieved: 11 November 2010.

Bibliography edit

  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.

November 23, 2023
gnome, lambda, gnome, lambda, french, designed, seven, cylinder, cooled, rotary, aero, engine, that, produced, under, license, britain, germany, powering, several, world, aircraft, types, claimed, produce, horsepower, from, capacity, litres, cubic, inches, alt. 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 730 cubic inches although recorded figures are lower 1 LambdaGnome 7 Lambda as shown in a 1913 Gnome catalogType Rotary aero engineManufacturer Gnome et RhoneFirst run c 1911Major applications Avro 504Bristol BoxkiteBristol ScoutNumber built 979 British production Just under 1 000 units were produced in Britain the majority 967 by the Daimler Company of Coventry A 14 cylinder variant was known as the Gnome 14 Lambda Lambda 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 Contents 1 Variants 2 Applications 2 1 Gnome 7 Lambda 2 2 Gnome 14 Lambda Lambda 3 Survivors 4 Specifications Gnome 7 Lambda 4 1 General characteristics 4 2 Components 4 3 Performance 5 See also 6 References 6 1 Notes 6 2 BibliographyVariants editGnome 7 Lambda Seven cylinder single row rotary engine Gnome 7 Lambda long stroke Increased stroke of 145 mm 5 71 in to raise the compression ratio to 3 87 1 and total displacement to 12 26 litres 748 cu in Gnome 14 Double 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 124 mm 4 88 in cylinder bore and 140 mm 5 51 in piston stroke for a total displacement of 11 52 litres 703 cu in external diameter of 1 020 metres 40 16 in 2 Motorenfabrik Oberursel U III German production of the Gnome 14 Double LambdaApplications editList from Lumsden nbsp The Sopwith Tabloid replica on display at the Royal Air Force Museum is fitted with an original Gnome 7 Lambda clarification needed engine Gnome 7 Lambda edit Avro 504 Blackburn Type I Borel hydro monoplane 3 Bleriot Parasol Bleriot XI Bristol Boxkite Bristol Gordon England G E 3 Bristol Coanda Monoplanes Bristol Coanda T B 8 Bristol Coanda P B 8 Bristol Scout Caudron G III Deperdussin Type B Dunne D 8 Henry Farman F 20 Grahame White Type XV London amp 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 Royal Aircraft Factory S E 2 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 Sopwith Sociable Sopwith Tabloid Sopwith Three Seater Vickers No 8 Monoplane Gnome 14 Lambda Lambda edit Avro 510 Royal Aircraft Factory S E 4 Deperdussin Monocoque Fokker D III 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 82Survivors editAn original Gnome 7 Lambda engine is installed in the Sopwith Tabloid replica aircraft on display in the Grahame White hall of the Royal Air Force Museum London 4 Specifications Gnome 7 Lambda edit nbsp Oberursel U III a copy of the 14 cylinder Gnome Lambda LambdaData from Lumsden 1 General characteristics Type 7 cylinder single row rotary engine Bore 124 mm 4 9 in Stroke 140 mm 5 5 in Displacement 11 8 L 720 cu in Length 112 cm 44 in Diameter 93 cm 37 in Dry weight 96 kg 212 lb Components 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 pusherPerformance Power output 50 3 kW 67 5 hp at 1 250 rpm maximum power Compression ratio 3 75 1See also editComparable engines Clerget Le RhoneRelated lists List of aircraft enginesReferences edit nbsp Wikimedia Commons has media related to wbr Gnome Lambda and wbr Gnome Lambda Lambda Notes edit a b Lumsden 2003 p 151 Obsah fora Zbrane a vybaveni Vyzbroj zbranove systemy vybaveni a prislusenstvi Motory Letecke motory Pistove Nemecko 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 Bibliography edit Lumsden Alec British Piston Engines and their Aircraft Marlborough Wiltshire Airlife Publishing 2003 ISBN 1 85310 294 6 Retrieved from https en wikipedia org w index php title Gnome Lambda amp oldid 1018267837, wikipedia, wiki, book, books, library,

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