Argus As 8
The Argus As 8 was a four-cylinder, air-cooled, inverted inline aircraft engine produced in Germany by Argus Motoren in the 1930s.
| As 8 | |
|---|---|
 | |
| Argus As 8 aircraft engine | |
| Type | Piston aircraft engine |
| Manufacturer | Argus Motoren |
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
- Albatros L 100
- Albatros Al 101
- Arado L II (As 8A)
- Arado L IIa (As 8R)
- Baumgärtl Heliofly III
- BFW M.23
- BFW M.27
- BFW M.29
- BFW M.35
- Blohm & Voss Ha 136
- Comte AC-12 Moskito
- Darmstadt D-22
- DFS 40
- Focke-Wulf Fw 44
- Heinkel He 64
- Heinkel He 72
- Klemm L 25E
- Klemm Kl 32
- Raab-Katzenstein RK.25/32
- Ruhrtaler Ru.3
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
- Specific power: 21.3 PS/l (0.344 hp/cu in; 15.7 kW/l)
- Compression ratio: 5.35:1
- Specific fuel consumption:
- 0.235 kg/PS/h (0.53 lb/hp/h; 0.320 kg/kW/h) at maximum rpm
- 0.230 kg/PS/h (0.51 lb/hp/h; 0.313 kg/kW/h) at maximum continuous rpm
- Oil consumption: 0.008 kg/PS/h (0.018 lb/hp/h; 0.011 kg/kW/h) 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)
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See also
Comparable engines
- Alfa Romeo 110
- Blackburn Cirrus Major
- de Havilland Gipsy Major
- Elizalde Tigre IV
- Hirth HM 504
- Menasco C4
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.
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