The Gnome-Rhône 14M was a small 14-cylinder two-row air-cooled radial engine that was used on several French and German aircraft of World War II.
14M-00
LH rotation, 474 kW (635 hp)
14M-01
RH rotation identical to 14M-00
14M-04
LH rotation, 521.99 kW (700 hp)
14M-05
RH rotation identical to 14M-04
14M-06
LH rotation, 521.99 kW (700 hp), reduction gear 0.71:1
14M-07
RH rotation identical to 14M-06
14M-08
LH rotation, 559.27 kW (750 hp), reduction gear 0.71:1
14M-09
RH rotation identical to 14M-08
Breguet 693
Focke-Wulf Fw 189E
Gotha Go 244
SNCAC NC.510M
SNCAC NC.530
SNCAC NC.600
Henschel Hs 129B
Potez 631
Potez 633
Potez 637
Potez 662
Potez 63.11
(14M-5 identical except opposite rotation)
Data from
Type: Fourteen-cylinder two-row supercharged air-cooled radial engine
Bore: 122 mm (4.80 in)
Stroke: 116 mm (4.57 in)
Displacement: 18.92 L (1,154.6 cu in)
Length: 1,251 mm (49.25 in)
Diameter: 950 mm (37.40 in)
Dry weight: 419 kg (924 lb)
Valvetrain: Two overhead valves per cylinder
Supercharger: gear driven, 8.258:1 ratio, 1-speed supercharger
Fuel system: Bronzavia 110-L2 carburretor with automatic boost and altitude control
Fuel type: 87 octane rating gasoline
Oil system: Pressure feed 482.6 kPa (70 psi), dry sump, 120 S.U. secs (25.1 cSt) grade oil.
Cooling system: Air-cooled
Reduction gear: 0.71:1
Air Equipment 47 electric inertia starter
Power output:
(Take-off): 521.99 kW (700 hp) at 3,030 rpm for takeoff with 1,100 mm (43.3 in) Hg / +3 kg (6.6 lb) boost
(Normal): 492.16 kW (660 hp) at 3,030 rpm at 4,000 m (13,123 ft)
(cruising): 339.29 kW (455 hp) at 2,350 rpm at 4,000 m (13,123 ft)
Specific power: 27.21 kW/l (0.61 hp/(cu in))
Compression ratio: 6.5:1
Specific fuel consumption: 0.29 kg/(kW h) (0.48 lb/(hp h))
Oil consumption: 0.01 kg/(kW h) (0.018 lb/(hp h))
Power-to-weight ratio: 1.27 kW/kg (0.77 hp/lb)
B.m.e.p. max: 1,075 kPa (155.9 psi)
