Gnome-Rhône 14N
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The Gnome-Rhône 14N was a 14-cylinder two-row air-cooled radial engine designed and manufactured by Gnome-Rhône just before the start of World War II. A development of the Gnome-Rhône 14K, the 14N was used on several French and even one German aircraft.
Design and development
The 14K's reliability was poor, so Gnome-Rhône carried out major redesign, using different materials for the pistons and valves, and enlarging the cooling fins to increase surface area by 39%.
The 14N was introduced in 1937 and was quickly installed 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 increased power.
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 restricted by the armistice with Germany.
Variants
Data from:Aircraft engines of the World 1945,[1] Aircraft engines of the World 1946[2]
- 14N-2: Left hand (LH) rotation, Template:Cvt
- 14N-3: Right hand (RH) rotation version of N-2
- 14N-10: LH rotation, Template:Cvt
- 14N-11: RH rotation version of N-10
- 14N-16: LH rotation, Template:Cvt
- 14N-17: RH rotation version of N-16
- 14N-20: LH rotation, Template:Cvt
- 14N-21: RH rotation version of N-20
- 14N-44: LH rotation, Template:Cvt
- 14N-45: RH rotation version of N-44
- 14N-48: LH rotation, Template:Cvt
- 14N-49: RH rotation version of N-48
- 14N-50: LH rotation, Template:Cvt
- 14N-54: LH rotation, Template:Cvt
- 14N-55: RH rotation version of N-54
- 14N-58: LH rotation, Template:Cvt
- 14N-59: RH rotation version of N-58
Applications
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Specifications (14N-48)
Data from Aircraft engines of the World 1945[1]
General characteristics
- Type: Fourteen-cylinder two-row air-cooled piston engine
- Bore: Template:Cvt
- Stroke: Template:Cvt
- Displacement: Template:Cvt
- Length: Template:Cvt
- Diameter: Template:Cvt
- Dry weight: Template:Cvt
Components
- Valvetrain: Two inlet and two exhaust overhead valves per cylinder
- Supercharger: Single-stage single-speed centrifugal type supercharger
- Fuel system: Stromberg carburetor
- Fuel type: 87 octane rating gasoline
- Oil system: Pressure fed at Script error: No such module "convert".
- Cooling system: Air-cooled
- Reduction gear: 0.5:1 planetary reduction gearing
Performance
- Power output:
- Take-off: Template:Cvt at 2,650 rpm
- Military: Template:Cvt at 2,400 rpm at Script error: No such module "convert".
- Cruise: Template:Cvt at 2,100 rpm at Script error: No such module "convert".
- 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)
See also
- Pratt & Whitney R-1830 a comparable engine sometimes fitted as an alternative to the 14N on French designs
- BMW 801
- Bristol Hercules
- Bristol Taurus
- Fiat A.74
- Mitsubishi Kinsei
- Nakajima Sakae
- Piaggio P.XIX
- Shvetsov ASh-82
- Tumansky M-88
- Wright R-2600
References
Citations
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Bibliography
- Danel, Raymond and Cuny, Jean. L'aviation française de bombardement et de renseignement 1918-1940 Docavia n°12, Editions Larivière