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Guide to motor selection - suitable power?

Tony Harrison 2

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While the equations are valid when all you have is a resistance, an electric motor (brushed or brushless) is NOT just a resistor, it actually has inductance (coil of wire) as well as the back emf due to rotation.

Quite simply, if all the power from your battery is being converted to heat then your motor will rotate perfectly OK and drive the propeller without needing the battery, so just take the battery out and go flying!



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