Quote:
Originally Posted by bongodriver
something is not quite right about a 9lbs boost being ok for climb for 30 minutes when climbing is the more stressfull in terms of cooling etc and only having a 5 min limit in level flight with more cooling, I don't see why 9lbs boost and 2,850 rpm couldnt be maintained in level flight for at least 30 mins.
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I don't see a reason either. These names for the ratings are somewhat arbitrary, naturally there's nothing preventing you from using 9lbs boost and 2,850 rpm for level flight, apart from temperatures and increasing engine wear. The names like 'combat' and 'climb' were somewhat arbitrary.