Gnome-Rhône 14N

Gnome-Rhône 14N
Type	Radial engine
National origin	France
Manufacturer	Gnome et Rhône
First run	1937
Major applications	Amiot 351 Lioré et Olivier LeO 45
Developed from	Gnome-Rhône 14K Mistral Major
Developed into	Gnome-Rhône 14R

The Gnome-Rhône 14N was a 14-cylinder two-row air-cooled

, 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

.

Variants

Data from:Aircraft engines of the World 1945,^[1] Aircraft engines of the World 1946^[2]

• 14N-2: Left hand (LH) rotation, 780 kW (1,050 hp)
• 14N-3: Right hand (RH) rotation version of N-2

• 14N-10: LH rotation, 680 kW (910 hp)
• 14N-11: RH rotation version of N-10

• 14N-16: LH rotation, 697 kW (935 hp)
• 14N-17: RH rotation version of N-16

• 14N-20: LH rotation, 846 kW (1,135 hp)
• 14N-21: RH rotation version of N-20

• 14N-44: LH rotation, 780 kW (1,050 hp)
• 14N-45: RH rotation version of N-44

• 14N-48: LH rotation, 880 kW (1,180 hp)
• 14N-49: RH rotation version of N-48

• 14N-50: LH rotation, 1,000 kW (1,400 hp)

• 14N-54: LH rotation, 930 kW (1,250 hp)
• 14N-55: RH rotation version of N-54

• 14N-58: LH rotation, 880 kW (1,180 hp)
• 14N-59: RH rotation version of N-58

Applications

Specifications (14N-48)

Data from Aircraft engines of the World 1945^[1]

General characteristics

• Type: Fourteen-cylinder two-row air-cooled piston engine
• Bore: 146 mm (5.75 in)
• Stroke: 165 mm (6.50 in)
• Displacement: 38.67 L (2,360 cu in)
• Length: 1,480 mm (58.27 in)
• Diameter: 1,290 mm (50.79 in)
• Dry weight
  : 620 kg (1,370 lb)

Components

• overhead valves
  per cylinder
• centrifugal type supercharger
• Fuel system: Stromberg carburetor
• Fuel type: 87 octane rating gasoline
• Oil system: Pressure fed at 480 kPa (70 psi)
• Cooling system: Air-cooled
• Reduction gear: 0.5:1 planetary reduction gearing

Performance

• Power output:
  
• Take-off: 880 kW (1,180 hp) at 2,650 rpm
• Military: 790 kW (1,060 hp) at 2,400 rpm at 3,900 m (12,800 ft)
• Cruise: 630 kW (850 hp) at 2,100 rpm at 3,900 m (12,800 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)

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-1820

References

Wikimedia Commons has media related to Gnome-Rhône 14N.

Citations

1. ^ ^{a b} Wilkinson, Paul H. (1945). Aircraft engines of the World 1945 (3rd ed.). -New York: Paul H. Wilkinson. p. 235.
2. ^ Wilkinson, Paul H. (1946). Aircraft engines of the World 1946 (4th ed.). London: Sir Isaac Pitman & Sons Ltd.

Bibliography

• Danel, Raymond and Cuny, Jean. L'aviation française de bombardement et de renseignement 1918-1940 Docavia n°12, Editions Larivière