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Potez 4D


The Potez 4D was a four-cylinder, inverted inline aircraft engine. It was first built shortly before World War II, but did not enter full production until 1949. The cylinders had a bore of 125 mm (4.9 in) and a stroke of 120 mm (4.7 in). Power for different models was in the 100 kW-190 kW (140 hp-260 hp) range.


164 kW (220 hp)
119 kW (160 hp)


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S.N.C.A.C. NC-840 Chardonneret
Nord 3202
Nord 3400


Potez 4-D 01
Type: Four-cylinder air-cooled inverted inline engine
Bore: 125 mm (4.92 in)
Stroke: 120 mm (4.72 in)
Displacement: 5.85 L (352
Length: 1,207.5 mm (47.5 in)
Width: 510 mm (20.1 in)
Height: 668.5 mm (26.3 in)
Dry weight: 143 kg (314.6 lb)
Valvetrain: Two valves per cylinder with sodium cooled exhaust valves
Fuel system: One Zenith carburettor
Fuel type: 80 octane minimum
Oil system: Dry sump with one pressure and two scavenge pumps
Cooling system: air-cooled
Power output: 119 kW (160 hp) at 2,520 rpm (take-off), 97 kW (130 hp) at 2,360 rpm (Max cruise)
Compression ratio: 7:1
Specific fuel consumption: 245 gram/hp/hour (take-off)
Power-to-weight ratio: 0.83 kW/kg (0.51 hp/lb) (take-off)






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