Wrathall Mark wrote:

I just finished reading a book on Kurt Tank which included this interesting
information. A RLM study concluded that an engine capable of generating
1000HP at 7500m (~23K') required the same level on engineering effort as an
engine prodcuing 3500hp at sea level. This is probably nothing new for Jeff
and others who have actually built high altitude engines, but puts in
perspective the idea of bolting on a standard turbo and blowing away
turboprops in the flight levels

Mark.

 
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