Argus_As_8

Argus As 8

Argus As 8

1930s German piston aircraft engine

The Argus As 8 was a four-cylinder, air-cooled, inverted inline aircraft engine produced in Germany by Argus Motoren in the 1930s.

Quick Facts As 8, Type ...

Variants

As 8A
Initial production version 71 kW (95 hp) maximum for 5 minutes, 60 kW (80 hp) continuous.
As 8B
A more powerful variant developing 101 kW (135 hp) maximum for 5 minutes, 86 kW (115 hp) continuous.
As 8R
A variant produced for sport aircraft, particularly for competition use, developing 110 kW (150 hp) for take-off. Featuring:
  • Increased compression ratio, from 5.36 to 5.8
  • Improved cooling by increasing the numbers of cooling fins at the cylinder head and the cylinder body
  • Increasing the heat dispersing area of the pistons
  • Improved crankcase and oil cooling
  • Improved cylinder charging
  • Modified valve timing

Applications

Specifications (As 8B)

Data from Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944,[1] Argus AS-8R[2]

General characteristics

  • Type: 4-cylinder inverted air-cooled in-line piston engine
  • Bore: 120 mm (4.72 in)
  • Stroke: 140 mm (5.51 in)
  • Displacement: 6.332 L (386.40 cu in)
  • Length: 1,075 mm (42.3 in) without airscrew hub
  • Width: 470 mm (18.5 in)
  • Height: 731 mm (28.8 in)
  • Dry weight: 116 kg (256 lb) dry
128.4 kg (283 lb) equipped

Components

  • Valvetrain: Overhead valves operated by pushrods and rockers
  • Fuel system: One down-draught carburretor
  • Fuel type: 80 Octane Aviation gasoline
  • Oil system: Pressure feed at 3–6 bar (44–87 psi)
  • Cooling system: Air-cooled

Performance

  • Power output:
  • 135 PS (133 hp; 99 kW) at 2,200 rpm (5 minutes) at sea level
  • 125 PS (123 hp; 92 kW) at 2,150 rpm (30 minutes) at sea level
  • 115 PS (113 hp; 85 kW) at 2,090 rpm (max continuous) at sea level
  • 0.235 kg/PSh (0.53 lb/(hp⋅h); 0.320 kg/kWh) at maximum rpm
  • 0.230 kg/PSh (0.51 lb/(hp⋅h); 0.313 kg/kWh) at maximum continuous rpm
  • Oil consumption: 0.008 kg/PSh (0.018 lb/(hp⋅h); 0.011 kg/kWh) at maximum continuous rpm
  • Power-to-weight ratio: 1.149 PS/kg (0.514 hp/lb; 0.845 kW/kg)
  • B.M.E.P.: 7.7 atm (7.8 bar; 113 psi)

See also

Comparable engines

Related lists

References

  1. [1]
    Schneider, Helmut (Dipl.Ing.) (1944). Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944 (in German) (Facsimile reprint 1986 ed.). Leipzig: Herm. Beyer Verlag. p. 357. ISBN 381120484X.
  2. [2]
    "Argus AS-8 R:". he64.com. Retrieved 12 August 2014.

Further reading

Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 15.

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