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Post by highflyer50 on Mar 28, 2011 9:37:54 GMT 1
the ? I have is the stock battery that came with the cub is a 15c
could I go with a 20c with out burning anything up if ok to use
would the W x L x H of the 20c be the same as the 15c I know its
a dumb ? rather be safe then sorry besides I'm new to all this and
trying to learn THANKS
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Post by flydiver on Mar 28, 2011 17:05:58 GMT 1
Going 20C only increases the ability of the power package to perform IF it is capable of it. If the motor/prop combo was being limited by the battery you may get a bit more performance out of it. Theoretically it should be fine...but... the ESC on the Cub is running a fine limit. It certainly is not worth buying more expensive and lame PZ lipos.
Size is size. 20C won't make it bigger but a different brand could very well not be quite the same dimensions. It should be close. Most places will give you the dimensions. The battery box sux. Cut a hole in it.
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will
Flight lieutenant
Posts: 39
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Post by will on Mar 28, 2011 20:10:41 GMT 1
I've used a 20C 1350mAh 3S without any problems. That's up to 27 amps continuous/34 burst, according to the label. I haven't noticed a difference in power.
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Post by highflyer50 on Mar 28, 2011 21:25:49 GMT 1
ok thank you I see ( hobby partz ) has blue lipos for $6.99
thought I would get a few
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Post by Dillzio on Mar 28, 2011 22:18:46 GMT 1
I think to get the best out of your batteries, it's good to have a battery that should technically be able to provide twice the amount of amps you need. I have a mate that flew his Trojan on the stock batteries, then he tried my zippy 2200mah 20Cs in it and it was like flying a different plane. Even though the zippy batteries were noticeable heavier, they still made the plane much quicker.
All lipos 'sag' while under load, that is, their voltage drops. A nice powerful lipo is going to stay around 12v at max throttle, where as a lipo with a lower C rating is likely to be running under 11v.
In terms of a higher C battery burning out your motor, that should be impossible. The highest C battery you can get your hands on still can't put out more than about 12.5v at full throttle - any motor capable of running 3s should be able to handle this voltage range without any problems. The only way a higher C battery could theoretically harm your motor is if you were running a prop that was too big. A little 20a battery might sag down to 11v at full throttle with a big prop, where as a 40a battery would hang around 12 volts and cause the amp value to jump by about 10% (a bit less actually). If you were already right on the borderline of what your motor could safely handle, then a bigger C battery may hurt the motor. Realistically though, once that high C battery got a bit discharged though, it would perform identically (in terms of power output) to a full-lower C battery.
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Post by flydiver on Mar 28, 2011 23:49:01 GMT 1
Yes, but in this case the weak link is not the motor, it's the ESC/RX combo.
Have you already forgotten the one you burned up?
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