Argus As 8

As 8
Argus As 8 aircraft engine
Type Piston aircraft engine
Manufacturer Argus Motoren

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

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. ^ 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. ^ "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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