Potez 4E

Potez 4E
Type	Air-cooled flat-four engine
National origin	France
Manufacturer	Potez
Major applications	SAN Jodel D.150 Mascaret
Produced	1960–1965

The Potez 4E is a French air-cooled flat-four piston engine of the 1960s. It was unveiled at the 1959 Paris Air Show,^[1] entered production in 1960 and is rated at 78 kW (105 hp).^[2] It remained in production until 1965 when Potez abandoned production of aero-engines.^[3]^[4]

Variants

4E-00: 67.1 kW (90 hp)^[5]
4E-02
4E-20: 78.3 kW (105 hp)^[5]
4E-30: Fuel injected. 86.5 kW (116 hp)

Applications

Specifications (Potez 4E-20)

Data from ^[2]^[5]

General characteristics

Type: direct drive right-hand tractor air-cooled flat-four piston engine
Bore: 110 mm (4.33 in)
Stroke: 90 mm (3.54 in)
Displacement: 3.42 L (208.70 cu in)
Length: 782 mm (30.8 in)
Width: 778 mm (30.6 in)
Height: 605 mm (23.8 in)
Dry weight: 92 kg (203 lb) dry un-equipped, 103 kg (227 lb) equipped

Components

Valvetrain: Two valves per cylinder with dual springs operated by rockers and pushrods from a gear driven camshaft.
Fuel system: One NAS 42 Zenith carburettor
Fuel type: 100/130 octane
Oil system: Pressure feed to bearings and moving parts at 300–480 kPa (43–70 psi), oil grade SAE 50 and 40
Cooling system: Air-cooled
Reduction gear: Direct drive
12 Volt Ducellier electric starter motor, 12 Volt 250 Watt belt driven generator

Performance

Power output: 78 kW (105 hp) at 2,750 rpm for take-off, 61 kW (82 hp) at 2,600 rpm at 910 m (3,000 ft) cruising
Specific fuel consumption: 0.298 kg/kW/hr (0.49 lb/hp/hr) at normal cruising power
Oil consumption: 0.18 kg (0.40 lb)/hour
Power-to-weight ratio: 1.68 kW/kg (1.02 hp/lb)

References

^ "The 23rd Paris Show" Flight 14 August 1959, p.20.
^ ^a ^b Flight Aero Engines 1960, p.375.
^ Taylor 1965, p.456.
^ Flight International 7 January 1965, p.24.
^ ^a ^b ^c Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.

Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.
Aero Engines 1960". Flight, 18 March 1960, pp. 367–387.
Aero Engines: A "Flight International" Survey". Flight International, 7 January 1965, pp. 19–34.
Taylor, John W. R. Jane's All The World's Aircraft 1965-66. London: Samson Low, Marston, 1965.

[1] "The 23rd Paris Show" Flight 14 August 1959, p.20.

[Flight_60_375-2] Flight Aero Engines 1960, p.375.

[3] Taylor 1965, p.456.

[Flight_65_24-4] Flight International 7 January 1965, p.24.

[JAWA62-63-5] Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.

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[2]

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[5]

v t e Potez aero engines
Inline engines	4D 6D 8D 12D
Horizontally opposed engines	4E
Radial engines	3B 6Ba 9Ab 9B 9E