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

  1. ↑ "The 23rd Paris Show" Flight 14 August 1959, p.20.
  2. 1 2 Flight Aero Engines 1960, p.375.
  3. ↑ Taylor 1965, p.456.
  4. ↑ Flight International 7 January 1965, p.24.
  5. 1 2 3 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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