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-   -   futaba brushless servos (https://www.rctech.net/forum/radio-electronics/194904-futaba-brushless-servos.html)

aspris 12-09-2007 01:09 PM

futaba brushless servos
 
does ni-mh battery works on bls futaba servos?????????

johnnyboy 12-09-2007 01:12 PM

Yes.

aspris 12-09-2007 01:49 PM

bls
 
thanks man..do u knowwhy they wrote ni-cd use only??

magm20001 12-09-2007 02:49 PM

they prob meant no use of 7.2v lipo, at least not without the 6v regulator.

aspris 12-09-2007 08:01 PM

thanks

FITO 12-10-2007 04:56 AM

the new brushless servos from futaba can or can't be used with lipo battery

johnnyboy 12-10-2007 07:22 AM

Hmmmm I've never seen that. I am running mine in a car with a LiPo pack....

tallyram 12-12-2007 07:16 AM


Originally Posted by FITO (Post 3957927)
the new brushless servos from futaba can or can't be used with lipo battery

you have to use a voltage regulator with a lipo! 6v is 6v no matter the battery!

magm20001 12-12-2007 12:45 PM


Originally Posted by johnnyboy (Post 3958242)
Hmmmm I've never seen that. I am running mine in a car with a LiPo pack....

for nitro racing, where we plug the receiver battery direct into the reciever. so if you have a lipo receiver pack, the servo will be getting 8.4v-7volts, so it will be around 2 volts too high, thats why need a 6v regulator

for electric racing the lipo pack plugs into the ESC and the recevier plugs into the ESC, so its not an issue.

Anthony.L 12-12-2007 01:53 PM

It does not matter what the battery source is (i.e. Li-po, Li-ion, NiCAD, NiMH, etc), only what the input voltage to the servo. Every car ESC has a built-in voltage regulator that takes the input voltage from the battery and regulates it to typically 6volts, which is the max most servos are rated to handle.

Trips 12-15-2007 04:33 PM

The reason that some Futaba servos came labelled "For NiCad use only" wasn't about excessive voltage. The reason was that in certain applications, people using NIMH receiver batteries were finding that certain servos pulled a lot of current and could drop the receiver batterie's voltage below the point that the receiver could operate and would cause glitching and lockouts.

It was most often seen in large airplanes with multiple servos operating.

martman_oc 12-20-2007 10:56 AM

I use nimh and lipo battery packs with all my Futaba servos. No problem, go for it.:D

Loop&Roll 12-20-2007 06:43 PM

Its all about the electrons!!! and electron flow, not sure if NiMH/NiCd will supply the same electron as a LiPO... might need an electron meter. :D I will test, document and report on my findings :D stand by for the results :)


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