Gnome-Rhône_14N-38

Gnome-Rhône 14N

Gnome-Rhône 14N

1930s French piston aircraft engine

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.

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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, 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

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

References

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

Citations

  1. [1]
    Wilkinson, Paul H. (1945). Aircraft engines of the World 1945 (3rd ed.). -New York: Paul H. Wilkinson. p. 235.
  2. [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
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