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Front engine
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Looking at the data I think there's one or two smoking guns and it's the fuel flows and possibly timing. I've attached two flights from this week; one yours and one mine so we have similar ambient temps, etc. The book calls for 18.1GPH takeoff fuel flows and the conventional wisdom has been to pad that a bit. Comparing the two, your front engine ranges from 17.6GPH to 17.8GPH at takeoff power and my front engine seems to stay at 18.3GPH. So the front needs more fuel. The other thing to look at is ignition timing and the rate with which your cylinder temps rise. Your CHT's climb FAST and this can be an indication of timing that's advanced. As a matter of fact, I'm going to be checking my timing for the opposite reason; I think mine might be a degree or two retarded. Action items:
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_________ John K 1977 337G CNC3 Last edited by kilr4d : 02-11-19 at 07:45 PM. |
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