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Old 2nd January 2012 | 16:30
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CharlieDeltaUK
 
Joined: Nov 2010
Posts: 148
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From: UK
Question about reading performance and fuel data

When reading data about fuel burn, it looks like the data is quoted by reference to two variables:

Best economy or best power
and
% power

For example:

For best economy cruise:
8.5 GPH at 75% power
7.5 GPH at 65% power
6.6 GPH at 55% power

For best power:
10.0 GPH at 75% power
8.8 GPH at 65% power
7.8 GPH at 55% power

I'm confused because, for any given % power (ie throttle setting), I would have assumed that the net result is either an economy cruise, or a best-power setting, or somewhere between the two. But, I don't see how, for example, a 75% power setting can be applicable to both 'best economy' and 'best power'. I've doubtless got some fundamental misunderstanding here (I'm still a student) which I'd like to clear up.

Thanks as ever for your help.
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