Electric planes and high volt lipo batteries ? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 11-03-2005, 12:43 PM   #1
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I am: Peter H
Join Date: Oct 2004
Location: Whitby, Ontario (next to Toronto)

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Electric planes and high volt lipo batteries ?

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Can you plug a lipo 11.4V battery into a normal reciever ?
I thought either the reciever or servos only operated on 4.8V or 6V.
For electric planes with lipo's above 6V, do you have to have some sort of regulator ?
Would running 11.4V to the reciever and thus the servos damage them ?

These may seem like dumb questions, but I don't know the answers.

Thanks for you help
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Old 11-03-2005, 01:01 PM   #2
I am: Boolean21
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You must run a regulator between the RX battery and airborne radio gear when using lipos as RX batteries. Typically you would use a 2s pack (8.4V fully charged) and regulate to 5.7V. There is no point to carrying the extra weight of a 3s pack for the RX as that voltage is just being stepped down anyways.

If you are running both the airborne gear and the motor off the same pack then there is typically a BEC (battery eliminator circuit) built into the speed control to allow the correct voltage to be delivered to the servos. The number of servos that you can run is dependant on the battery and the speed control.

For really high voltage setups (11.1 is not high voltage) like 5s (21V) and up I would avoid using a BEC as the stepdown in voltage is high and there are few BEC's that work well when doing this. Also typically weight is less of a concern so its better to run a seperate RX pack.
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