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I don't disagree with you Dean on the spares issue etc., but as I see
it is you add up the cost of the engine and spares and then the fuel used over 40K hours or so and see where the real $ are. I also don't disagree about two different vintage engines; newer are more efficient, but look at the SFC on a CF6 of about 40K thrust and a CF34 of 9K thrust (same vintage) and I bet the larger engine has the upper hand; maybe not. Good discussion subject and it would be interesting to hear from others who know what they are talking about. Obviously anything I say comes from being around these things, not because I profess to be any kind of authority. Any aircraft turbine engineers out there? Neat thing about aviation is there is always something to be learned. |
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