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Old 5th Dec 2013, 22:50
  #29 (permalink)  
andrewr
 
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This new type auto based engine must operate at 85-100% of it's maximum rated power for it's entire life cycle at a very high RPM, which causes accelerated engine wear.
As I said in post #23, rated power is an arbitrary number, based in large part on how long you need the engine to last at that power. Yes, you might have problems if you use the quoted power in an auto application as the rated power for an aircraft application - but again, that might be 4 times the power/capacity you get from a Lycoming. If you were developing an aircraft engine you would be more conservative in setting the power rating.
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