Electric Stunt > Gettin all AMP'ed up!

zzzap!!!

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Alan Hahn:
Well the speed controllers are sold with a maxium ampere rating. At "full" throttle, they are supplyinng full battery voltage to the motor. Depending upon the rpm of the motor (it's "kV" rating) and the propeller you choose (a big  one which limits the rpm to a value which is a lot less than 1/2 times the kV motor rating and the battery voltage), you could put a so many amps through the motor that you burn it out, or the speed controller if it were matched to the motor.

Dean Pappas:
Hi Roger,
The respoonses you got are all good, but they beg the important issue ...
Go buy a current meter. The Astro Whattmeter is great, and so is a $50 clamp-on DC current meter you can get from Sears. in any case, when you try a new prop, or change anything in the setup, please measure the current and you can be sure that yoiu aren't overstressing the power system components that you bouight with your hard-earned money.

Planning = economy!
later,
Dean Pappas

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