Polish Aviation Museum

31-864 Kraków,
al. Jana Pawła II 39
phone: (12) 640 99 60,
(12) 642 40 70
e-mail: info@muzeumlotnictwa.pl

a cultural institution of the Malopolska Region

Małopolska – Kraków Region


Mecenas Muzeum

Kraków Airport

Instytut Techniczny Wojsk Lotniczych - sponsor restauracji samolotu Caudron  CR.714 Cyclone


Patroni Medialni

Skrzydlata Polska



Aircraft engine: Junkers Jumo 205

Junkers Jumo 205
Germany
inline engine
1940



Configuration6-cylinder 12-piston inline
Coolingliquid
Displacement16.0 l
Compression ratio1:18
Power output800 hp

The first successful aero diesel in the history of aircraft engines.

In 1907, Hugo Junkers patented a multifuel engine. The idea did not meet an interst in that time. In 1920's Junkers returned to this idea, adapting the engine to the Diesel oil. He responded this way to a need for an economical engine, which could power long distance aircraft.

Designed at the beginning of the 1930s, a high compression two stroke Jumo 205 engine had six cylinders in a vertical in-line configuration. In each cylinder, two pistons work opposite, driving two crankshafts. Its rotations are transmitted through the reduction gear onto the propeller shaft.

The engine was considered to be the only successful high compression engine in the history of aircraft propulsion till the beginning of the 21st century. It was used on the Blohm & Voss BV 138 and the Dornier Do-26 flying boats.

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