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This was the first German aircraft engine with an output of 100 hp.

In the early days of flight, the model 4 (commonly known as the 100 hp Argus) did well. Its only problem was the reliability of the lubrication system. The cylinders of the engine are arranged in a single row and have been cast in pairs. The two-piece crankcase is made of aluminium. The valves are controlled by a control shaft via push-rods and double-armed rocker arms positioned in one side of the crankcase.

The Argus Motoren Gesellschaft began to manufacture aircraft engines as early as 1908. In 1912 the Inspection Authority for Aviation and Vehicles honoured the achievements of the Argus company as the only company in Germany up to that time to produce an aircraft engine with an output of 100 hp. The engine was  used in aircraft from the firms Aviatik, Goedecker, Haefelin, Harlan, Jeannin, Otto and Rumpler.  In 1914 the engine cost 7500 mark.

Technical specifications:

  • Manufacturer: Argus-Motoren-Gesellschaft, Berlin-Reinickendorf, 1911/12
  • Water-cooled 4-cylinder in-line engine
  • Output: 74 kW (100 hp)
  • Speed: 1370 rpm
  • Cubic capacity:  8.7 l
  • Bore diameter: 140 mm
  • Stroke: 140 mm
  • Mass: 170 kg