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› 10S vs. 12S question
04-11-2010 04:59 AM  8 years agoPost 1
Aaron29

rrProfessor

USA

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Hi all. Shopping for a 600 size electric and have a question over setup.

As I see it, 12S is the way to go.

Pros:
-Battery costs aren't much different.
-You can either get more power or more flight time, your choice.
-You can stretch to a 700 size if you ever want to
-For any given setup, you probably push the batteries less.

Cons:
-Sure it weighs a little more
-Need a bigger esc

I don't see many significant negatives to outweigh the pros. But of course I know little about electrics so I'd like some opinions.

Help me figure out why I should not be going 12S. Seems lots of people run 10S and I'd like to know why 12S isn't THE choice.

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04-11-2010 05:05 AM  8 years agoPost 2
Wingman77

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Pulaski Tennessee

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well you actually don't need as big of an esc if you go 12s, you need a HV esc but the amperage will be much less.

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04-11-2010 05:06 AM  8 years agoPost 3
michael88997

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Lewisville,Tx

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well for either setup you will probably run a cc 110hv or 85 so esc is the same... the main difference is charging, i have 8s cause it has plenty of power and i dont need a hyperion duo

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04-11-2010 05:13 AM  8 years agoPost 4
Dr.Ben

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Richmond, VA, USA

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Other than a bit more weight and the logistics of charging, the argument for higher versus lower cell count set ups will generally fall in favor of the former. Any time you increase your cell count and keep power more or less the same, the current demands on the batteries and ESC drop. It's a win-win situation.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-11-2010 05:27 AM  8 years agoPost 5
Aaron29

rrProfessor

USA

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So charging, that's the only reason to go 10S?

How bad is 12S charging compared to 10S?

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04-11-2010 05:33 AM  8 years agoPost 6
Wingman77

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Pulaski Tennessee

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your best bet is to go 12s 2p for charging

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04-11-2010 05:43 AM  8 years agoPost 7
TJinGuy

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Socorro, NM - USA

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your best bet is to go 12s 2p for charging
If you are talking about running a pair of 6s packs in series, it is 12s1p, just made up of 2 packs. That is the WHOLE reason to run 12s in my mind. Sure you get the benefits of lower power system currents but the fact is that the stress on the packs is essentially the same as a 6s setup. This is because the stress is relative to the battery size. But that makes no difference, as 12s is definitely the way to go and here is why.

1) Charging a pair of 6s packs is easy and efficient whether you use a dual port charger, charge the packs in parallel on a single charger or have 2 chargers. Any way you slice it, it is much simpler than HAVING to have a 10s or 12s charger.

2) You can use a pair of TRex 500 packs! Not only are there a ton of different packs on the market, making them really easy to find and not too expensive, but you can dual use them on a 500.

- Chris

Team New Mexico
TJinTech

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04-11-2010 05:46 AM  8 years agoPost 8
Wingman77

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Pulaski Tennessee

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I have always heard people refer to two 6s packs in series as 2p....or am I missing something??

anyway using two 6s packs is definitely the way to go, I am also considering converting my 600 to 12s and am trying to figure out what size packs to go with, anyone have some ideas? I am thinking about something in the 2.8-3ah range

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04-11-2010 05:50 AM  8 years agoPost 9
Aaron29

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USA

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It'd be series, not parallel. I do see what you mean, use two 6S's in series to get a 12S.

(2 6S in parallel would be 6S2P and would just have more mah)

What's this about pack stress? Is a 10S stressed less than 2 6S?

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04-11-2010 05:54 AM  8 years agoPost 10
Wingman77

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Pulaski Tennessee

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well the talk about pack stress is because you are running twice the voltage and pulling half the amps...but if you size the batteries correctly it will be stressing them the same but all your wires and esc will have a lighter load on 12s.

also you should charge the packs in parallel.

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04-11-2010 06:00 AM  8 years agoPost 11
Aaron29

rrProfessor

USA

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Well I think pack stress, depending upon how much worse it is, could push the balance of favor.

What kind of difference are we talking about here? Will you tend to get more cycles out of a 10S or a 12S? Or is there a difference.

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04-11-2010 03:50 PM  8 years agoPost 12
Wingman77

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Pulaski Tennessee

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there is not a difference.

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04-11-2010 03:53 PM  8 years agoPost 13
Aaron29

rrProfessor

USA

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Cool. What difference in charger/charging are we talking about?

Can you get a good 12S charger or do you have to parallel charge. Is that slow?

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04-11-2010 04:33 PM  8 years agoPost 14
Dr.Ben

rrMaster

Richmond, VA, USA

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You can either use a dual output charger like a Duo3, Bantam8, or the upcoming new TP charger (others out there too, but you get the point)or you can use two less costly 6S max chargers and charge each pack as a stand alone arrangement.

A 10S set up gives no fewer cycles per se unless the power and current demands for that set up are causing significant amounts of pack and esc heat. If you then take that power requirement and get it via 12S, the pack and esc temps will drop because the current will be less.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-11-2010 09:52 PM  8 years agoPost 15
Wingman77

rrProfessor

Pulaski Tennessee

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Can you get a good 12S charger or do you have to parallel charge. Is that slow?
you can but they tend to be very expensive, I would stick with what you already have and just charge in parallel, so if you have two 6s 3000mah packs you are running in series charge them in parallel at 6 amps for a 1c charge rate.

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04-12-2010 01:48 AM  8 years agoPost 16
TJinGuy

rrProfessor

Socorro, NM - USA

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Let me say once more that the biggest benefit of a 12s 600 bird is that you can use a pair of 500 sized packs like 6s 3000mAh packs. There is no use for 10s and 12s packs imo.

- Chris

Team New Mexico
TJinTech

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04-12-2010 05:03 AM  8 years agoPost 17
michael88997

rrElite Veteran

Lewisville,Tx

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how much 3d flight time are yall getting from 12s 3000? and do yall use the hv85 or 110?

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04-12-2010 05:18 AM  8 years agoPost 18
Wingman77

rrProfessor

Pulaski Tennessee

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I use the 85hv on 6s so if you go to 12s the 85hv would be overkill.....the 110 would be pointless...

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04-12-2010 05:27 AM  8 years agoPost 19
michael88997

rrElite Veteran

Lewisville,Tx

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ya the only thing i was thinking is use it for the 700e ... i think im just gonna fly my 8s 600 until the 700e comes out and is up to flying good... guess i better start saving now lol

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04-12-2010 04:21 PM  8 years agoPost 20
TJinGuy

rrProfessor

Socorro, NM - USA

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The Ice HV 80A is a nice choice for a 600e on 12S. I would easily choose that over the 85HV or 110HV. And Wingman is correct, the 110 is totally wasted on a 12s 600. The 80A is overkill but the cost over the 60A is small enough not to worry.

I just helped a friend buy and build a TRex 600e using the Ice 80A, HK4035-630Kv and CC BEC Pro. He started with a pair of Turnigy 40C 6s 2650s. Headspeed is 2150 I believe. His flight time is 3:30-4:00 of hard smackdown style 3D. Honestly he is probably harder on a bird than anyone else I know, so that should be factored in. Everything comes down lukewarm and is holding up well ... well except the Rex600. Last time he flew it the tail drive gear stripped when he was banging on it about 10ft up and it went in. Too much power Anyhow looking at the logs off the Ice, we see that he averages just under 30A and peaks in the 80A range once in a while. He did have one 105A peak but that is not common. As such the ICE HV 60A would have sufficed, even for this level of flying but the small cost difference made the 80A more attractive. He is not pleased with the 3:30-4min flight times so I believe he is planning to move up to Turnigy 30C 6s 3300s in an attempt to get a solid 4:30min or maybe even 5min.

- Chris

Team New Mexico
TJinTech

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