This is a Junkers Jumo engine (ca. 1930s) that runs on diesel fuel.  Benefits
 include no valves to fail and no ignition system to fail.  Should be
 very reliable and, if the weight isn’t prohibitive, a good aircraft
 engine.


Marc Wiese

The junkers Jumo diesel, at aircraft power levels, did not save enough fuel to justify it's extra weight.
The Germans  gave up on it about the start of WW II.

The same thing happens on recent aircraft diesel engines.

Paul Lamar



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