Quote:
Originally Posted by 10kmahE-maxx
Thanx for the info, i have taken to time to learn a good bit about the precautions and dangers of lipo, although i still plan to get the free lipo dvd from maxamps.
Unfortunately, i have the old chassis e-maxx :( and when i bought it i had heard about the new e-maxx but didn't know when it was coming out, it came about a month after i bought mine, i was really pissed.
I was thinking of getting 10k pack under the idea that a higher mah rating will allow the motor to draw more power, which seems to be a dumb idea. I am trying to keep the truck a light as possible, i've got her down to about 8lbs without batts.
Why does the amount of voltage a ESC can handle drop signifcantly with a BEC ?
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How much power the packs will deliver is related to it's capacity. But that's not the only thing. It has to do with it's "C" rating. Most 10,000mah packs are 10C. This means they will deliver 100 amps continous.
However, if you get 5000mah packs that are 20C rated, they will deliver 100amps continous also.
A 4000mah pack that is 15C will deliver 60 amps continously.
It's not the ESC's voltage handling ability that drops. It is the internal BEC. The one that's inside the ESC on the brain board. Most interal BEC's are linear. The external ones are usually the switching type.
A linear BEC just "burns off" the excess voltage to transform pack voltage to usually 5 volts. This creates ALOT of heat. The higher the pack voltage, the more heat there is. Most recommend using an External BEC on anything above 3S.
By using the CC BEC, you can also adjust it to a 6 volt output. This speeds up your servos and makes them stronger.
