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.
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
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
^ 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 .
^ "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.
External links
Wikimedia Commons has media related to
Argus As 8 .