Junkers Fo 2

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The Junkers Fo 2 was a two-stroke - opposed piston engine that of Hugo Junkers founded in 1913 German company Junkers engine GmbH. It was the first direct fuel injection engine intended for a vehicle. The patent for this design was granted to Junkers on September 27, 1907.

It was a horizontal, water-cooled 6-cylinder engine. For the first time, the crankcase and pistons were made of light metal, and the thin-walled cylinder liners were made of steel. The two crankshafts were connected to one another by a straight-toothed spur gear set, which also drove the capsule fan to convey the scavenging air. The first engine in this development series, the Mo 3, still had four cylinders and was designed for operation according to the diesel process . It worked with an airless direct injection of the fuel into the combustion chamber. The Idflieg , however, showed no interest in an aviation diesel engine, especially in this horizontally expansive form. In contrast, the German Navy saw good opportunities for the powerful engine as a drive for ships, for example torpedo speedboats. She wanted to run the unit on gasoline.

To this end, Otto Reuter's engine was converted to direct gasoline injection and spark ignition. This engine, which has been further developed and enlarged to six cylinders and is now designated Fo 2, was used during test runs on 23/24. January 1917 up to 352 kW (475 hp). Since this high output was offset by its low weight, the water-cooled motor with only around 1.2 kg / hp was not far from the values ​​of the air-cooled rotary motors of the time. The end of the war brought an abrupt end to this promising development, at least temporarily.

After the First World War , four Junkers Fo 2 were intended to drive the Junkers G1 , but the project had to be discontinued.

Technical specifications

  • Bore: 110 mm
  • Stroke: 2 × 150 mm
  • Displacement: 17.1 l
  • Power: 352 kW / 475 hp at 1800 min -1

swell

  • The Junkers teaching show. A guided tour through the teaching show . 2nd edition Junkers-Flugzeug- und –Motoren AG, Dessau 1939 (EA Dessau 1936).
  • Wolfgang Wagner: Hugo Junkers. Aviation pioneer, his aircraft (Die deutsche Luftfahrt; Vol. 24). Bernard & Graefe, Bonn 1996, ISBN 3-7637-6112-8 .