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Old Oct 20, 2012, 01:28 AM
222 km/hr Parkjet flyer
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Latvia, Ventspils pilsēta, Ventspils
Joined Jan 2010
8,395 Posts
Using a LiPO with BEC is fine except you are limited to the amps capability of the BEC. So you need to make sure you get the highest possible to avoid loss of control.

Personally I prefer NiMH packs, having flown many years in 80's 90's with the standard packs supplied with radios .... 500 - 600mAh 4.8v - I find todays packs of 2000 and more mAh to be more than enough for all my needs.
The other comforting factor is that know my 2300mAh NiMH packs can supply higher amps than the average BEC can when demanded.

For my big gas model - I use 2 NiMh packs of 2300mAh .... one for the Rx and servos, other for the ignition. I also have a 'battery backer' that takes a second 'emergency' pack so if first fails - automatically switches over to the second instantly without losing Rx .... that second pack is a very small light 280mAh NiMh pack ....

But each to their own ... I know my system is not everyones cup of tea ...

Nigel
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Old Oct 20, 2012, 09:33 AM
Garfield is my Pilot
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Joined May 2011
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I like the LiFe packs for the RX, no BEC needed if you run high voltage servos. Still using a NiMH for the Ignition though, 4 cell 1800mah. Not all my planes run LiFe, only 2, the rest are using Venom 5 cell packs.
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Old Oct 20, 2012, 11:17 AM
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Quote:
Originally Posted by acdii View Post
I like the LiFe packs for the RX, no BEC needed if you run high voltage servos.
Not true - any 6v servo will be fine. HV servos can take 8.4v an unregulated 2s LiPo battery.

Mike
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Old Oct 20, 2012, 11:38 AM
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Mtn Home, Idaho
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I'm running ds610s unregulated with a 2cell lipo
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Old Oct 20, 2012, 05:10 PM
Garfield is my Pilot
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Joined May 2011
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I meant anything above 4 volts as HV. Most servos today can take the 6.6, but older servos can't. I noticed a lot of servos that are rated at 6 volts being called high voltage.
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Old Oct 20, 2012, 05:13 PM
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Quote:
Originally Posted by acdii View Post
I meant anything above 4 volts as HV. Most servos today can take the 6.6, but older servos can't. I noticed a lot of servos that are rated at 6 volts being called high voltage.
That is my point - servo's being called HV or high voltage are able to handle 8.4v NOT 6v or 6.6v.

The vast majority of standard servos (even old ones) can easily handle the 6.6v LiFe puts out but they are called standard not high voltage.

Mike
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