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Old Dec 30, 2012, 08:27 AM
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An itch?. Scratch build.
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South Wales U.K.
Joined Mar 2003
15,392 Posts
Efficiency is a tricky word in my opinion.

Is it motor 'efficiency', i.e. power in to power out ?, (may have to be measured on a dynamometer).

Or is it 'efficiency' of the flight, i.e. the maximum flight duration.?.

What if the motor was quite efficient, but the model wasn't ?, or the model was quite efficient at flying, but the motor was the wrong one for the required flight ?.

As I said, to me efficiency is a tricky word when related to model aircraft.
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