Just want to point out something for the previous WEP discussion. This is not a response to any specific point of view, just something I didnt see mentioned specifically, it it was and I missed it, my bad.
The WEP limits on 109s, Spits, P-51s, P-40s etc etc etc. Are in no way thermal limits by any stretch of the imagination. The five minute time limit or 10 minute time limit is a semi-arbitrary number intended to guarantee a certain length of engine life at a operational level. We are talking multi mission engine life, not omg you ran the engine at WEP for 5 min 1 second BOOM.
There are an overwhelming number of accounts and tests, aside from general knowledge of engines, that back this up. Pilots routinely ran WEP for periods greater than 15-20min with no adverse effects during that specific mission. Some of the engine tests run by the AAF were for period of over 7 hours, just to make sure it wasnt going to ruin the engine. I am sure there are German tests of a similar nature. It certainly wore the engine out faster, but it almost never caused failure during combat. There is a reason for example, that the 5min WEP time on the P-51B of 67inches is still 5min at 75 or 72 inches. Same goes really with almost any WEP setting. You will notice they keep the arbitrary time limits despite upping power significantly.