Auto prop pitch does not work properly during startup on the E-4. You have to switch it back to manual, fiddle with direct pitch control and switch it back then to auto to make it work. Otherwise it keeps, for some reason, a very low RPM.
All 109E overheat too fast now. It's impossible to maintain proper coolant temperatures with the radiator flaps 1/4 open, even though flight tests note that with that setting a constant + 90 Celsius can be maintained.
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