Quote:
Originally Posted by Kwiatek
Well probably the same problems like other planes could have with engine which is using in emergency power settings for too long time. In Clod 109 E could fly all time at 1.35 Ata 5-minutes emergency power without any problems other hand something is not correct if Spit Mk II have unexpected engine faluires flying even only at continous power ( + 6lbs 2850 RPMs).
Im sure you dont want Spitfires flying at emergency power +12 lbs all day long without any problems but fuel?
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Theoretically planes CAN flew at emergency power for extended periods, but wear will be high on the components. It was not set in concrete, and the reason of failure is always down to failure in one component. If the coolant (indicating the engine block itself is at optimum temperature) and oil temperatures (indicating the proper lubrication is provided) are all right within limits, and other components do not fail, it should be possible. Bench tests often exposed engines to very long during duration at maximum power, so it was possible. Of course during bench tests optimum oiling and cooling is provided.
I guess the frequent failure you have experienced on Spits is down to a failure of a specific component, or improper operation like too rich mixture leading to excessive local temperatures, burning out of exhausts etc. which is the reason I ask what kind of component you expect to fail on the 109 or any other plane. Knowing this would let us understand if the model is correct.