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6s vs 2,3 or 4s same capacity, which is best?

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6s vs 2,3 or 4s same capacity, which is best?

Old 11-08-2010, 10:36 PM
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Default 6s vs 2,3 or 4s same capacity, which is best?

I just received from someone 3 batteries that I intend to use on my Trex SE. They are from China (what isn't in this hobby!) and are in a 6S1P 25C 1800 configuration. Just out of curisity, because all things electric are sort of hazy or at least not crystal clear, would my heli perform better with one of those, or with a 2,3 or 4S of the same 1800 capacity? Would it give me higher head speeds? I'm going to use them with a Scorpion 2221 and Scorpion Commander ESC 30amp ESC.

Thanks!
Old 11-08-2010, 11:29 PM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?

the 6S will be too high unless your ESC can attain its 6S voltage and you will have to use a lower KV motor somewhere in the 1100 - 1500kv rating. just to use that 6S. and 1800mah will to too heavy and big for your 450. around 13006S will do fine
Old 11-09-2010, 07:11 PM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?

Hi Joe,

Sounds like your talking about a 450 trex...they use a 3S battery.

3S means 3 individual lipo cells shrinkwrapped into a single unit. 3S lipos have an 11.1 voltage. They are used on an ESC of 30 - 35 amps.

6S are 6 cells and are usually reserved for a trex 500. They have a voltage of 22.2 volts. They also are used on an ESC of 75 amps or higher.

Hope this helps with some of the confusion.

For your 450 you may want to get a 3S lipo in the 2200 mAh range and have a C rating of 25. HobbyCity sells some decent Turnigy's or Flightmax that wouldn't empty your wallet.

Good luck,

Mark
Old 11-09-2010, 08:30 PM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?


No, that isn't it - I should have phrased my question better. I am very familiar with the terminology of electric power and know what a 2,3 etc cell battery is, and yes, the batter is a 6S1P at 22.2 volts. Check it out at www.kongpower.com they are marketing it as a high performance 450 sized battery.

Whomever replied before you was correct in saying a lower Kv motor would be more efficient.

My esc is rated up to 6S and is a 30C battery . Iguess the answer would be to 1st run it on 7.4 and 11.1 volts or 2 and 3 cells, record the RPM;s and then do the same with the 6S1P, and record the resulting RPM's and temp of the motor and ESC - mine is rated to 22.2 volts.

So, I suppose while the 6S1P would result in more RPM's but would be less effient than a 7.4 or 11.1 volt and the resulting loss of efficiency in heat, as it has to go somewhere.
Old 11-09-2010, 08:37 PM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?

If you will be playing around with a 6S setup its best to get a lower KV motor. For the lipo pack. that 1800mah is too large for this setup. Normally we are using only 1300mah 6S packs for a 450 setup. it will do at least 5 - 7 mins depending on your flight characteristics. but 5 mins of hard 3D will do just fine. Motor and lipo pack temps are far better than the stock 3S setup as you are now playing with high Voltage.. Amps is not a question as even tough its only a 1300mah pack. it will last as far as a 2200mah 3S pack. but with lots and lots of torque...
Old 11-09-2010, 09:27 PM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?

I own one of these batteries also, and it weighs less than my 3 cell 11.1v Thunderpower. And his ESC is rated up to 6 cells. I think his question, which he asnwered himself, was would using that battery result in higher head speeds and he is correct - the RPM's of a motor are determined by multiplying the voltage times the Kv rating of the motor. Or to be more accurate, the motor will TRY to acheive that RPM, but I do not think his scorpion swinging a 325mm blade is going to reach that RPM, ie; loss of efficiency is expressed by increased heat.Same thing as a light bulb - a typical incandescant bulb vs a high efficency bulb will be far hotter.
Old 11-09-2010, 10:48 PM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?

that pack must be really small.. as its lighter than a 22003s Pack... sounds good
Old 11-10-2010, 03:46 PM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?

70mm long x 35mm deep x 35mm high , I don't know the exact weight, but holding both of them the kong power feels lighter. One disadvantage to them is most battery chargers only go to 4 cells, I had to buy a new charger for it. I use it mostly for my EDF's.
Old 11-10-2010, 07:39 PM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?

how long does the pack last on an EDF jet? at 1800mah it might last only a couple of minutes 3 - 4 and you have to land the jet
Old 11-10-2010, 08:49 PM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?

I have a Y wire harness and connect them (2)in paralell and double the capacity. 2 wired that way takes thesame space as my3 cell 3300 which is what I prefer in my edf's, but with the 26'sI get about 9 minutes, a lot less if Ikeep it pushed all the way up, which is how Ilike to fly. Obviously by the tone of the replies it wouldn't be a popular choice with all you gurus, but Ilike it just fine. Why is everyone so down on this?It's a personal choice - get over it people, it works for me - run what you like. I jumped into this thread to answer joe_crash's (nice moniker!!) question:Would it result in a higher head speed - the answer is yes. While it may not be the best battery for the job, if his esc and motor can handle it, who cares?
Old 11-11-2010, 05:32 AM
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Default RE: 6s vs 2,3 or 4s same capacity, which is best?

Since this question prompted such much interest, I did a little research, and found that my heli setup was in fact designed for a 6 cell battery.

From the Scorpion motor manual to you here it is:

"<font size="3">

For helicopters that are designed to run on a 6-cell pack, like the Outrage G5, <font size="4" color="#ff0000">the new HK-2221-1630 motor is the one to use. This motor was designed for 6-cell Li-Po use to take full advantage of the efficiency that is available from running a higher voltage system in a 450 class helicopter. Many people are converting their Trex 450 and Thunder Tiger Mini-Titans to 6S power, and this is just the motor for that.</font> Normally a 13 tooth pinion gear is used, and some are using the 14 tooth pinion as well "

So, I hope this will end this thread once and for all as I choose to believe the folks who actually made it and thank you to all who contributed to make this so interesting. (Oh, and my<font size="4" color="#ff0000"> Scorpion Commander II 26v 30amp 2-6cell ESC</font> was designed for this use as well.)</p></font>

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