I think "cruise climb" is anartefact of the goode olde days
A relic possibly of radial engines? The power reduction after takeoff in a flat 4/6 is pretty well established in the industry, but have yet to hear a reason other than avague “to be kind to the engine”. I’ve yet to see temperature figures that suggest it is.
I’ve seen quitea few replies to this question that are similar to Pilot DAR’s, an engineer who has found cracked cylinder, and attributed it to shock cooling.
I personally think that shock cooling has been massively overplayed, and that the 1” per minute or the like is silly over complication. However, I’d very much like tosee some real data (I’m dreaming I know) relating engine cooling rates (downloaded from an engine monitor) compared to cylinder life. If there is a connection, I would suggest it is related more to engines being cooled rapidly from a temperature they shouldn’t have been operating at, rather than engines being cooled rapidly from a sensible starting temperature.
Without numbers,the arguments could continue forever. The problem is that cylinders crack, because unless you park you plane in the shed the engine is going through hea tcycles, but how the nature of those heat cycle affect this… that’s the argument. There are well known clusters of cylinder cracking between certain serial numbers on some brands. I think pilots take the rap too often.
Last edited by Aerozepplin; 22nd June 2012 at 01:49.