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I am looking for some figures surrounding the specs of brushless motors and their relative efficiency (in power usage terms) for multi-copter use.

There are 4 basic specs for motors themselves: - Motor width (EG 28mm) - Motor height (EG 30mm) - "KV" - RPM per volt supplied (EG 800KV) - wattage (eg 300w)

This would then be a 28-30 800kv 300w motor.

What i am looking for is a chart containing: - Motor spec - pack voltage (eg 14.8v) - Amps drawn @ various % throttle (10% to 100% say) - static thrust from various propellers (11x5, 12x6 etc etc)

Does such information exist? I know its a BIT subjective as prop and motor designs vary slightly, but a baseline would be a start.

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  • $\begingroup$ To say that it's a bit subjective to prop choice would be an understatement... $\endgroup$
    – David
    Oct 14, 2014 at 22:40
  • $\begingroup$ exactly, so it would have to be based on the same prop design. $\endgroup$ Oct 15, 2014 at 8:57

2 Answers 2

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You can use the eCalc Multicopter Calculator. You select a set of motors, propellers and battery size and the program will output lots of data: Thrust, Motor efficiency at hover, Current and Voltage at hover, Motor efficiency at maximum power, Current and Voltage at maximum power, etc.

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The programm you are searching for is http://www.drivecalc.de/

They have all the common motors with lot of data... some "special" motors you won't find there

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