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AlignRC Thunder Power RC
Turner0022

Senior Heliman

Old Hickory Tn

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Dose a 65c battery really give more punch than a 30c ? Worth trying ? Or get different motor ? ( 130x ) weak Boggs

I am unstable and have no safe mode

10-10-2016 08:41 PM
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RM3

Elite Veteran

Killeen, Texas - USA

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oh boy here we go again....

i came up with a real simple analogy to explain the difference between two identical packs with different C ratings for my understanding...

now imagine both of them are the same recipe 12oz Budweiser's served at the perfect 38 degrees F.... one can has an extra wide mouth... the other is a tiny pull off tab from the 80s...

which one can you drink out faster without collapsing the can during a beer drinking contest? the one with the big mouth right... well thats the same deal with (true) C ratings... the higher the C ranting the higher rate they can be discharged without damage and still maintain a particular voltage while doing it.

Mr watt/hour will be here to explain further im sure...

BTW...C ratings are often hyped up by manufacturers by a significant margin...

showing a preference will only get you into trouble, 90% of everything is crap...

10-10-2016 09:22 PM
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Heli_Splatter

Key Veteran

Silver Spring, MD by way of Sidney, Ne - USA

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True, that is the simple answer, but all depends on the entire system down line being able to use the power and convert it to thrust. So most likely yes. Will it be double? Probably not.

10-10-2016 09:34 PM
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cudaboy_71

Elite Veteran

sacramento, ca, u.s.

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It really all comes down the the internal resistance (IR) of the weakest individual cell of the pack (weakest link in the chain, and all). If you have a charger or other device to measure IR, you can tell for yourself.

We've all known for ages that the manufacturers fudge the numbers for marketing. But, if you really want to know how much current you can pull, just do the math. Now, if you don't have a pack to check the IRs, then you're trusting the manufacturer to some extent. But, from personal/empirical evidence the higher the c rating, the lower the IRs of each cell. But, they're not close to what is advertised.

here's an online calc:

http://www.soko-heli-tools.com/en/l...calculator.html

enter the cell capacity, and highest cell IR of the pack and click 'calculate C'. (cell count is irrelevant to calculating C)

conversely, enter cell capacity, and the advertised C rating and click 'calculate IR'

Just keep in mind I've NEVER. EVER. seen a pack with IRs close to what the advertised C rating should be. So, don't be too upset if your 4400mah 65C pack isn't .3mu

if it ain't broke, break it.

10-10-2016 10:05 PM
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jason46

Veteran

MI

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I think battery size and flight style make a difference also. I do mostly sport flying, mild 3d, and I look for the highest C rating I can find for my warp while 30c works fine for me in a 600. Every 450 heli I've had seems to be harder on batteries than larger helis, just parading around seems to get them warm.

We made up some rules can we have your moneys now.

10-10-2016 11:02 PM
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Ace Dude

rrProfessor

USA

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Battery size (capacity) is inversely proportional to IR. Generally speaking, larger capacity packs have a lower IR.

  

10-11-2016 12:23 AM
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ICUR1-2

Key Veteran

Ottawa, Ontario

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Poor OP

Dose a 65c battery really give more punch than a 30c ? Worth trying ? Or get different motor ? ( 130x ) weak Boggs
A higher C rated lipo will give more punch. How much more depends on the brand.
As for the Bogging of your 130X. Have you tried decreasing the amount of collective pitch and cyclic pitch?
Have you tried increasing headspead ?

spending time, paying attention

10-11-2016 12:53 AM
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jason46

Veteran

MI

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I just realized your heli is a 130x. If you are keeping to the 80% rule, how warm/hot are the packs after a flight? Like I said, smaller helis seem to heat packs up more, if your packs are coming down on the warmer side a higher C rating may help you get more cycles out of them.

I'd think in a small heli like that there would be some gain in power. While back I had a brushless mcpx and the higher C rating batteries seem to give it more "pizazz".

As far as bogging, what are you running for throttle? Do you run those guys flat out?

We made up some rules can we have your moneys now.

10-11-2016 01:16 AM
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LaDon

Veteran

Fort Dodge .Ia

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RM3 ---- Mr watthours? Hahahaha that is a funny one!!! I love it

Team Jr

10-11-2016 02:22 AM
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Cobra 46

Key Veteran

Cambridge il usa

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Ive read so many posts about this im skipping right by for about three days then ill read the last two pages !

10-11-2016 02:52 AM
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dkshema

rrMaster

Cedar Rapids, IA

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Before you all get tangled up in yet another esoteric discussion, can you BUY a 2S, 300 mah, 60C LiPo?

And if so, how does it compare in size and weight to the batteries you already have.

And since this is a 130x, will the difference even be noticeable enough, to justify the cost? Are you simply expecting more performance than the 130X can deliver?

As already alluded to, better setup may buy you more performance than a different battery.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

10-11-2016 05:54 AM
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Slowpoke

Key Veteran

Dublin, OH

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Cuda,

I tried your online calculator on a new RoaringTop pack that I got today.

This is the 1st pack of this brand I've tried.

It's a 6S, 5500mah, advertised at 70C.

I did the initial charge at 5amps, which is a tad under 1C.

After taking it off the changer and let it settle for an hour, my iCharger 308 Duo listed the IRs as:

1.7 1.5 1.6 1.7 1.7 1.7

Plugging this into the calculator gave me a 25.3 C rating.

Does the IR, and thus the C rating, get better after a few cycles?

25 is a long walk from 70

Slowpoke

10-12-2016 03:14 AM
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cudaboy_71

Elite Veteran

sacramento, ca, u.s.

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That's what I meant by 'C' ratings are mostly marketing. I don't think what a pack lists as its C rating has any basis in reality. Sub 2mu readings on a new 5000-5500 mah cell is actually very good. And, the IR will typicall drop a little bit after the first 10 cycles or so of a good pack. So, I wouldn't be worried.

As a comparison, I've had Pulse 65C, GensAce 45C and Thunderpower 55C 6s 5000s all in the 2.0mu +/- .4 new.

if it ain't broke, break it.

10-12-2016 04:19 AM
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Slowpoke

Key Veteran

Dublin, OH

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Thanks, that makes me feel a little better. I had never heard of the RoaringTop brand until a week ago and decided to try one.

Tomorrow I should be able to get a few flights in and work the pack a little.

10-12-2016 04:27 AM
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Richardmid1

rrProfessor

Leeds, England

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Hi everyone!

60% of the time, it works every time!

10-13-2016 03:10 PM
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ICUR1-2

Key Veteran

Ottawa, Ontario

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LOL we needed your input to determine how many giga watts the 130X needed for more POP

spending time, paying attention

10-13-2016 07:37 PM
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airboss

Elite Veteran

OC ,california

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My 70C Nano Techs are half as good as my 40C Pulse packs. the rating doesn't mean crap if the battery is a POS !

Urukay HPS3 KSE 700 HPS3

10-14-2016 03:58 AM
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Richardmid1

rrProfessor

Leeds, England

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It could simply be that the OP's packs are dying and any new pack would bring more punch.

Also if it's cold out the packs will warm up nicely in your pocket before flying and give significantly more punch.

60% of the time, it works every time!

10-14-2016 07:15 AM
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