New generation Turnigy 60c lipos who's using them?

[Helimaddan]

Hi guys
I'm looking for some feedback on the 60-130c lipos from Turnigy how are you getting on with them?
Particularly of interest are packs for a 550 trex and 700, replays much appreciated

[Sharpedge]

I can't even find them anywhere, I think it is going to be a while before you are going to see any long term results

[Helimaddan]

I can't even find them anywhere, I think it is going to be a while before you are going to see any long term results

Really? Theres a ton on HK right now.

[Andy from Sandy]

Well I call bullshit on their 65C packs.

5000mAh 6S pack for example

Continuous discharge = 325Amps to flatten the pack in 1 minute! How many times can it do that before the wire and connectors melt?

6S pack means that is 7215Watts with the cells at 3.7 volts.

Total crap, it just isn't going to happen.

[Randall]

Thunder tiger packs carry the same claim, tbh i cant see it either 7kw out a lipo would be a bit scary. But my 20c packs are now 18 months old with 200 flights and i kid you not no puffing at all and still perform great. Not sure why they are lasting so long always leave 20% in them but thumbs up to my turnigy packs.

On the other hand my friend who always runs them until low voltage warning puff in 3 months.

[Cagey]

So what kind of set up would a 550 need to take advantage of that crazy wattage ? Take off, lunar shot to umpty thousand feet, hit TH and auto somewhere in the same county if your lucky and at what cost ? Bloody daft, but what do I know ? Not a lot obviously.

[Helimaddan]

Tbh I don't even bother looking at peak claims because as you guys have said its just not going to happen in every day flying, but still even a pack claiming mega c ratings is still going to get the same assement from myself as a 20c pack, in use and it's that type of info I was hoping for.

[Sharpedge]

Really? Theres a ton on HK right now.

My bad, was looking in the turnigy blue section not Nano Tech

[cjcj1949]

I think we should look at the heat generated in the pack. That's CurrentX current X internal resistance Joules per second or watts. Packs will get a fixed rise in temperature for a fixed amount of energy or joules, less any heat they can loose by cooling. So every time the C rating doubles the internal resistance has to go down by a factor of 4. There will also be less heat lost as there is less time to lose heat. So these packs must have an internal resistance around 1/5 that of 30C packs. A reasonable 30C pack would be around 1.5 milliohms, so these packs must be around 300 micro ohms.

It's just impressive, what HK can produce, or at least what they claim... They are not alone though, I don't think it is possible for any lipo pack to run at even 30C, as there is no way for the heat to get out from inner cells. Of course, they might mean that one cell on its own will work at 30C once without exploding...


Higher C packs will run cooler though and will be ok for 5 minute flights and be able to give high currents for high load situations. I'd like to know the irs of some HK 3S packs and I'm happy to test them. I think I'll stick with GensAce for now. They come with a tested ir value for each cell.

[Jez N]

I have many nano-techs and have to say i think for the price they perform excellently and as someone else said, they keep performing after hundreds of cycles with little or no puffing. Whether what they claim is in any way possible i dont know. But value for money they certainly are.

[Paulice]

The ratings are a laugh.
A 5000mAh 65C/130C nano-tech at 22.2 V DC to handle (65C) 325 Amps you would need a cable size of 16mm squared or AWG 6
when you think the lipos that are rated at 65C come with 4mm bullets attached to a AWG12 cable that are 65C with 130C burst the cables to handle that sort of power would be as big as jumper cables for a car.

just for the fun of it: 130C @ 22.1 volts with a cable length of 20cm would be 25mm squared or AWG 3. that's a cable as thick as your finger without insulation.

A 4mm squared cable AWG 12 can in open air handle a constant current draw of 90Amps, so 5000mAh pack 20C @ 22.2 volts = 100A

[Jez N]

The ratings are a laugh.
A 5000mAh 65C/130C nano-tech at 22.2 V DC to handle (65C) 325 Amps you would need a cable size of 16mm squared or AWG 6
when you think the lipos that are rated at 65C come with 4mm bullets attached to a AWG12 cable that are 65C with 130C burst the cables to handle that sort of power would be as big as jumper cables for a car.

just for the fun of it: 130C @ 22.1 volts with a cable length of 20cm would be 25mm squared or AWG 3. that's a cable as thick as your finger without insulation.

A 4mm squared cable AWG 12 can in open air handle a constant current draw of 90Amps, so 5000mAh pack 20C @ 22.2 volts = 100A

Maybe we should ask them to come on here and explain. What you have written is pretty damning evidence of false claims!

[Paulice]

Maybe we should ask them to come on here and explain. What you have written is pretty damning evidence of false claims!

I'm not saying there claims are false, just the cables they attach to the 65C packs are not up to the job by a long way, all the cable calculations are made on a cable length of 20cm, IE. direct to ESC would be approx 20CM but adding a connection in the middle.

[Leigh Beaumont]

Hi guys
I'm looking for some feedback on the 60-130c lipos from Turnigy how are you getting on with them?
Particularly of interest are packs for a 550 trex and 700, replays much appreciated

What sort of money are these packs? Are they standard or Nanotech type?

[Helimaddan]

What sort of money are these packs? Are they standard or Nanotech type?

Around $60-100 obviously depending on what yOur after so reasonable money.

Some interesting points made here especially on the cable sizes, to my mind that is false advertising sure the cells maybe 130c burst cape but if the cables supplied on the packs can't deliver this then as it's sold neither can the pack so it's a false statement. I can feel a well worded email been sent HKs way very soon!