Gnome-Rhône 18L

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The Gnome et Rhône 18L was a twin-row 18 cylinder air cooled radial engine. The 18L was a large step up in terms of displacement, power and number of cylinders. The majority of Gnome-Rhone engines being either 7, 9 or 14 cylinders. The engine proved not to be a success and it was dropped in 1939 due to a poor power to weight ratio. The American and British 18 cylinder engines proving lighter, smaller and generally more reliable.

[edit] Specifications (Gnome Rhone 18L)

General characteristics

• Type: 18 cylinder twin row air cooled radial eninge
• Bore: 146mm (5.75 in)
• Stroke: 180mm (7.09 in)
• Displacement: (3,308 cu in)
• Length: mm (in)
• Width: mm (in)
• Height: 1,400mm (55.12 in)
• Dry weight: 736kg (1,622 lbs)

Components

• Valvetrain: 1 inlet and 1 exhaust valve per cylinder
• Supercharger: Yes
• Fuel system: 1 Bronzania Carburetor
• Fuel type: 87 octane
• Cooling system: air

Performance

• Power output: 1,300hp @ 2,150 RPM
• Compression ratio: 6.10:1
• Power-to-weight ratio: 1.25lb/hp @ cruise speed

[edit] References

• Gunston, Bill. (1986). World Encyclopaedia of Aero Engines. Patrick Stephens: Wellingborough. p.84
• http://www.oldengine.org/members/diesel/Duxford/fraero2.htm

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