Gnome-Rhône 14N

Gnome-Rhône 14N
Type	Radial engine
National origin	France
Manufacturer	Gnome et Rhône
First run	1937
Major applications	Bloch MB.150; Messerschmitt Me 323; Amiot 351; Lioré et Olivier LeO 45
Developed from	Gnome-Rhône 14K Mistral Major
Developed into	Gnome-Rhône 14M,; Gnome-Rhône 14R

TheGnome-Rhône 14Nwas a 14-cylinder two-row air-cooledradial enginedesigned and manufactured byGnome-Rhônejust before the start ofWorld War II.A development of theGnome-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 theGnome-Rhône 14Rfeaturing a 2-stage supercharger, but this type was not widely used until afterWorld War IIas production of improved engines was restricted by thearmistice 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

Amiot 351(1 × 14N-38 + 1 × 14N-39)
Amiot 354(1 × 14N-48 + 1 × 14N-49)
Bloch MB.131(1 × 14N-10 + 1 × 14N-11)
Bloch MB.135(2 × 14M-4 + 2 × 14M-5)
Bloch MB.150(14N-7)
Bloch MB.151(14N-35)
Bloch MB.152(14N-25)
Bloch MB.155(14N-49)
Bloch MB.161(2 × 14N-38 + 2 × 14N-39)
Bloch MB.170(2 × 14N-6)
Bloch MB.174(2 × 14N-49)
Bloch MB.175(2 × 14N-48)
Bloch MB.210(1 × 14N-10 + 1 × 14N-11)
Bloch MB.220(1 × 14N-16 + 1 × 14N-17)
Bloch MB.300 Pacifique(2 × 14N-16 + 1 × 14N-17)
Dewoitine D.342(2 × 14N-16 + 1 × 14N-17)
Farman F.222.2(4 × 14N-11)
Farman F.224(4 × 14N-1)
Latécoère 611(prototype) (2 × 14N-30 +2 × 14N-31 )
Lioré et Olivier LeO 451(14N-48 + 14N-49
or 14N-38 + 14N-39 or 14N-46 + 14N-47)
Sud-Est SE.161 Languedoc(2 × 14N-44 + 2 × 14N-45 )
Messerschmitt Me 323(various)
Koolhoven F.K.58A (14N-16)
PZL P.24F and G (14N-7)
PZL P.24H (14N-21)
PZL.43(14N-1)
SNCAO CAO.700(4 × 14N-49)
SNCASE SE.100(1 × 14N-20 + 1 × 14N-21)

Specifications (14N-48)

Data fromAircraft 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

Valvetrain:Two inlet and two exhaustoverhead valvesper cylinder
Supercharger:Single-stage single-speedcentrifugal type supercharger
Fuel system:Strombergcarburetor
Fuel type:87octane 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)

References

Citations

^^a ^bWilkinson, Paul H. (1945).Aircraft engines of the World 1945(3rd ed.). -New York: Paul H. Wilkinson. p. 235.
^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 1918-1940Docavia n°12, Editions Larivière

[Wilkinson45-1] Wilkinson, Paul H. (1945).Aircraft engines of the World 1945(3rd ed.). -New York: Paul H. Wilkinson. p. 235.

[Wilkinson46-2] Wilkinson, Paul H. (1946).Aircraft engines of the World 1946(4th ed.). London: Sir Isaac Pitman & Sons Ltd.

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