CC Bec Pro on 12s

[DerClown]

Hi guys,
I want this bec to run on 12s setup. I know that it can support that, but heard some people had some issues running on 12s.
What you think ?

[newbheliusr]

More voltage in means less amps out.


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[RC Mike]

Originally Posted by DerClown

Hi guys,
I want this bec to run on 12s setup. I know that it can support that, but heard some people had some issues running on 12s.
What you think ?

I have one helicopter that I have been running 12s with a CC BEC Pro (690mm blades) for many years with no problems. Like was said with 12s input voltage the max output current is less so it all depends on your servos. There is a big difference in efficiency between brands. Futaba BLS series are the most efficient (lowest current draw) but they are also the most expensive. How hard you fly also effects the max current draw.

.

[Ah Clem]

You can always run it from one of the two 6S packs (unless you are running stick packs).

The difference in current consumption between the two packs will be negligible, and you will be able to check and change radio setting without accidentally powering up the helicopter, if you choose to do so.

[newbheliusr]

Originally Posted by Ah Clem

You can always run it from one of the two 6S packs (unless you are running stick packs).



The difference in current consumption between the two packs will be negligible, and you will be able to check and change radio setting without accidentally powering up the helicopter, if you choose to do so.

Best advice.


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[DerClown]

Originally Posted by Ah Clem

You can always run it from one of the two 6S packs (unless you are running stick packs).

The difference in current consumption between the two packs will be negligible, and you will be able to check and change radio setting without accidentally powering up the helicopter, if you choose to do so.

Great idea, never thought bout it. Thanks !

[jhamel]

If you talk to the Castle technicians, they stand firm that the BEC Pro is safe to use on 12S. However, they also admit that they themselves run it on 6S on their personal helis.

As mentioned above, when running the BEC Pro off the first 6S pack, the mah consumption between the two 6S packs is negligible.

There are also benefits to running the BEC Pro on 6S rather than 12S. One nice pro is that you can power up the electronics and perform a preflight check at the bench without fear of spinning the blades since the ESC is not powered. The other benefit is that the BEC Pro will output more current on 6S input than with 12S input.

[Xrayted]

Originally Posted by DerClown

Great idea, never thought bout it. Thanks !

Just make sure you wire it properly to low negative in the series setup or you can have serious trouble.

The negative wire from the BEC must connect to the negative batt lead going directly to the ESC negative lead, and the positive lead connects to that same packs positive lead.

The cool thing about this setup is you can power your electronics using a single pack without powering the motor

[DerClown]

Well my plan is to use it on Trex 800pro. In one flight it uses around 300mah, runing from one pack is not to small amount,

[jhamel]

The BEC Pro works well on 6S on 700 size helis. I don't know if there may be a concern about brown outs when spinning 800mm blades with electronics powered by the BEC Pro.

[DerClown]

Anyhow a little sad, that such great Brand as Castle releases BEC that on 12S setup can give just 8A..... And in doubt, that can be used safely on 12S setup.
By the way, does it have a Amp draw log ? Just to see how much the servos pulling in flight.

[newbheliusr]

Two words. Western robotics.


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[Ah Clem]

newbheliusr,

[jhamel]

I used a Western Robotics Hercules Super BEC in the past. I ended up selling it here in HF, and installed a BEC Pro instead.

The older style WR Hercules Super BEC only had 5.2v, 6v, 8.4v, and 9v options. For helicopters, 5.2v is low and 9v is too high. I was recommended to not use the 8.4v option with HV servos. Apparently, the HV servos work well with 2S LiPo's with the assumption that the LiPo voltage will drop and not stay at 8.4v permanently. I was told that exposing HV servos to 8.4v continuously would cut down on the servo's useful life. So, 6v may be the only reasonable option for helicopters.



The new version of the WR Hercules Super BEC has 5.2v, 6v, 7.4v, and 8.2v, so it may be a better option for helicopters.

The main issue I had with the WR BEC was that it was causing interference with the Spektrum telemetry module past 3S input. I wish I had recorded a video demonstrating this issue.

[newbheliusr]

WR super mini BEC G2

http://www.western-robotics.com/herc...r-mini_hp.html


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[RC Mike]

Originally Posted by curmudgeon

The new version of the WR Hercules Super BEC has 5.2v, 6v, 7.4v, and 8.2v, so it may be a better option for helicopters.

WR BEC’s are definitely the safest solution. That’s what I use in all my large expensive helicopters. No problems with 14SG TM. For HV setups use the 7.4v setting; 8.2 gives no better performance and shortens servo life.
　

[jstalnaker70]

on 6s you will have 13 amp CONTINOUS current witch should be plenty to run any HV set up..

[LaDon]

I use the bec pro on 6s also and have no problems with it. Just take some goop and glue the ring to the side of the bec so the weight of it isn't flopping the wires. If it does it will break them and your heli will crash. Otherwise it is fine I have used them for several years without a problem

[RC Mike]

The thing that always confused me is CC says it’s a 12S BEC but they don’t recommend using it for 12S. Other manufacturers like WR make BEC’s that will operate at full rated current at 12s or more. If the CC BEC Pro were properly designed it would not have so many limitations. They should redesign it for true 12s operation without any reliability restrictions.
　
It amazes me that CC has excellent ESC designs but marginal BEC designs.
　
　
.

[jhamel]

Originally Posted by RC Mike

The thing that always confused me is CC says it’s a 12S BEC but they don’t recommend using it for 12S.

When I called Castle about 2 years ago regarding this issue, the representative claimed that the BEC Pro could handle 12S just fine. However, he also confessed that virtually all the Castle pilots were running the BEC Pro on 6S on their 12S setups.

What I took from that is that as long as I run the BEC Pro on 6S (or perhaps 7S), it should work fine.

I have 5 BEC Pro's, all running on 6S, and I have not encountered any issues, at least not yet.