Gnome-Rhône 18L

18L

Type	Radial engine
National origin	France
Manufacturer	Gnome et Rhône

The Gnome et Rhône 18L was a French-designed 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 were 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.

Specifications (Gnome Rhone 18L)

Data from

General characteristics

Type: 18-cylinder twin-row air-cooled radial engine
Bore: 146 mm (5.75 in)
Stroke: 180 mm (7.09 in)
Displacement: 54.2 L (3,308 cu in)
Height: 1,400 mm (55.12 in)
Dry weight: 736 kg (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: 1,300 hp at 2,150 rpm
Compression ratio: 6.1:1
Power-to-weight ratio: 0.8 hp/lb at cruise speed

References

Wikimedia Commons has media related to Gnome-Rhône 18L.

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

Gnome-Rhône aircraft engines

Gnome rotary engines	1906 25hp rotary 1907 50hp rotary 34hp 5-cyl rotary 60hp 7-cyl rotary 123hp 14-cyl rotary Delta Gamma Gamma-Gamma Monosoupape 7 Type A Monosoupape 9 Type B-2 Monosoupape 9 Type N Omega Omega-Omega Lambda Lambda-Lambda Sigma

Le Rhône rotary engines	7 9C 9J 9R

Gnome et Rhône radial engines	5B 5K 7K 9A 9K 14K 14M 14N 14P 14R 18L 18R

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