I've mostly flown light single engine aircraft, with only a few multi engine hours. The only War Bird that I've flown was a Stinson L-5 Sentinel observation aircraft.<br style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><br style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">But in each and every one of them, the rule of thumb was to take off at full rich and start to lean back at around 3,000 ft. <br style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">If you run too rich, you carbon up the cylinders and valves. Too lean, and you'll overheat. You have to watched your cylinder head and oil temperatures so that you didn't get it too lean. Buy we definitely didn't run full rich up to 12,000 ft.<br style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><br style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">As far as propeller pitch. Each aircraft has factory recommendations for RPM (Pitch) and Manifold Pressure (Throttle) for Take Off, Climb, Cruise, Economical Cruise and Combat Power. I'm not sure how well any of this is modeled in IL2 and I've never found any guide or tutorial that helps you learn how to get the best performance out of the plane. <br style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><br style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">Almost everything I read is 100% pitch and 110% power. That might be what works in IL2, but you would blow up the engine of a real plane.