Fuel Consumption Approximations
75% Best Power 11.5 GPH 65% Best Power 10.5 GPH
75% Best Economy 10.0 GPH 65% Best Economy 9.5 GPH
Best power = 50° C rich of peak EGT Best Economy = Peak EGT (or LOP)

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The 75% "Best Power" and 75% "Best Economy" couldn't both be actually 75%,
could they?

Yes, they could. You are using more gas at the 75% best power setting
than at the 75% best economy setting.

It depends what you hold constant in the comparision. If we held fuel
flow constant, then for the same amount of gas, best power gives you a
higher percent of power, and best economy gives you less power (so as to
stretch the gas longer).

But if you hold power constant (instead of fuel flow), then best power
=uses= more gas ("wasting" some to give you the same power), and best
economy uses less gas, making the best (most efficient) use of the gas.

Jose
--
Money: what you need when you run out of brains.
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