The 14N was a 14-cylinder two-row air-cooled radial engine designed and manufactured by Gnome-Rhône. A development of the pre-war Gnome-Rhône 14K, the 14N was used on several French and German aircraft of World War II.
[edit] Design and development
Facing criticisms over the 14K's reliability, Gnome-Rhône undertook a major upgrade of its 14-cylinder design, using different materials for the pistons and valves, and enlarging cooling surfaces by 39%.
The new 14N was introduced in 1937 and was quickly adopted on several aircraft models. In 1939, minor improvements allowed Gnome-Rhône to increase the compression ratio from 6.1:1 to 6.8:1, which resulted in increased power for wartime production aircraft.
The 14N was further developed into the Gnome-Rhône 14R featuring a 2-stage supercharger, but this type was not widely used until after World War II as production of improved engines was prohibited by the terms of the armistice with Germany.
[edit] Applications
[edit] Specifications (14N 48/49)
Data from[citation needed]
General characteristics
- Type: Fourteen-cylinder two-row air-cooled piston engine
- Bore: 146 mm (5.74 in)
- Stroke: 165 mm (6.49 in)
- Displacement: 38.67 L (2,360 in³)
- Length: 1.48 m (66 in)
- Diameter: 1.29 m (50.8 in)
- Height: 1,289 mm (50.75 in)
- Dry weight: 620 kg (1,370 lb)
Components
Performance
- Power output:
- 868 kW (1,164 hp) at 2,650 rpm for takeoff
- 728 kW (976 hp) at 2,400 rpm at sea level
- 780 (1,045 hp) at 2,400 rpm at 4,800 m (15,750 ft)
- Specific power: 22.45 kW/l (0.49 hp/in³)
- Compression ratio: 6.8:1
- Power-to-weight ratio: 1.4 kW/kg (0.85 hp/lb)
[edit] See also
[edit] References
- Danel, Raymond and Cuny, Jean. L'aviation française de bombardement et de renseignement 1918-1940 Docavia n°12, Editions Larivière
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