Argus As 8
The Argus As 8 is a German aircraft engine that was used extensively in school and sports aircraft in the 1930s.
development
The construction of the As 8 was carried out by Manfred Christian and Franz Dinslage from 1928 and characterizes the turn to the air-cooled in-line engine with hanging cylinders, which was implemented in the following years in particular by the Argus and Hirth companies and, internationally known as the "German school", also subsequently found application in the construction of large, water-cooled engines. The advantages of this design when installed in the bow were a better view of the pilot sitting behind and a greater ground clearance due to the higher propeller.
The first test runs of the new model began in the spring of 1929. The sample test consisted of a 93-hour stand test, which included runs with overspeed and in an up and down inclination of up to 35 °. This was followed by a 72-hour flight test with a U 12 . In the following year, several M23c sport aircraft equipped with the As 8 took part in the European sightseeing flight of 1930 , which Fritz Morzik won with one of them, which made the engine and its special design instantly famous. In the next few years, the As 8 found widespread use and distribution in German sports and travel aircraft construction. In the following, a few modified versions were developed, the speed of which and thus performance was continuously increased by improving the cooling, intake system and other measures. A total of around 800 engines were built. The successor was the As 10 with doubled number of cylinders.
Versions
- As 8
- Basic version from 1929 with 80 PS (59 kW)
- As 8 A
- Performance-enhanced version with the following subgroups: A-1 and A-2 from 1931 with 110 PS (81 kW) at 2100 rpm and A-3 and A-4 from 1932 with 120 PS (88 kW) at 2100 rpm
- As 8 B
- Version from 1933 increased again to 135 hp (99 kW) at 2200 rpm
- As 8 R
- most powerful version of the As 8 with 150 hp (110 kW) at 2300 / min, inter alia, in the tourist plane 1932 in the participating He 64 was used
construction
The As 8 is an air-cooled four-cylinder , four-stroke , in -line engine with suspended cylinders and dry sump pressure lubrication. The crankshaft runs in six plain bearings in the cast electron housing, the cover of which also serves as an oil container. Air baffles are arranged between the cylinders.
use
- Akaflieg Darmstadt D 22
- Albatros L 100
- Albatros Al 101
- Arado L II
- Blohm & Voss Ha 136
- Focke-Wulf Fw 44
- Heinkel He 64
- Heinkel He 72
- Terminal Kl 25
- Terminal Kl 26
- Terminal terminal 32
- Messerschmitt M23
- Messerschmitt M27
- Messerschmitt M29
- Messerschmitt M35
- Raab-Katzenstein RK 25
Technical specifications
| Parameter | Data |
|---|---|
| length | 1070 mm |
| width | 421 mm |
| height | 890 mm |
| drilling | 120 mm |
| Hub | 140 mm |
| Total displacement | 6.33 l |
| compression | 5.35 |
| Starting power | 95 hp (70 kW) at 1600 rpm |
| Continuous performance on the ground |
80 hp (59 kW) at 1400 rpm |
| Dry weight | 113 kg |
| Power to weight ratio | 1.2 kg / hp (1.6 kg / kW) |
| Displacement | 15.0 hp / l |
| Fuel consumption at full power |
212 g / PSh |
| Octane number | 80 |
literature
- Kyrill von Gersdorff, Kurt Grasmann: aircraft engines and jet engines . In: German aviation . tape 2 . Bernard & Graefe, Munich 1981, ISBN 3-7637-5272-2 , pp. 119 ff .
- Bruno Lange: Type manual of German aviation technology . In: German aviation . tape 9 . Bernard & Graefe, Koblenz 1986, ISBN 3-7637-5284-6 , pp. 303 .
- Heinz J. Nowarra: The German Air Armament 1933-1945 . tape 4 . Bernard & Graefe, Koblenz 1993, ISBN 3-7637-5468-7 , pp. 91 .
