WTF!! Lipo fail.

[moyesboy]

On my cellpro4 I usually scroll though the screens and look at the cell voltages at the start of the charge. I have made my own adaptors to plug lipos into my charger and this check showed up some of my dodgy lead manufacture, ie once it showed just 2 cells when it was a 3 cell pack. Now If I hadn't checked that I would have got 2 of the 3 cells charged as above. Depending on the order of connections and which one is missed some types of lipo will not error if one of the balance leads on the pack is disconnected - so it loks like a cell count check at the beginning of the charge is an essential, and the power lead connection on the 10S is a very good check.

At least your unflown lipo is almost certainly undamaged! And well done you for looking into theproblem rather than just assuming you got a duff lipo.

Now suppose you had a trex500 and it was an align lipo - chances are you would have just thought "align lipo" when it puffed and then plugged in a loverly top brand lipo just the same way and stuffed that one too!

[Ashley Davis]

I would also stick the really knackered pack back on the charger and see if the cellpro can sort it out, you might not have done as much damage as you think.

[trebor27]

Sorry to hear your bad luck mate... Oh and I edited this post as I didn't notice it was 7 pages long!!!! (just been catching up now...)

[moyesboy]

I would also stick the really knackered pack back on the charger and see if the cellpro can sort it out, you might not have done as much damage as you think.

...provided it went back down to the original size and isn't still balloon shaped!

do they sometimes successfully re-absorb the gas Ash?

[Ashley Davis]

they can do, depends on the puff. If it's bad it breaks the pack seal and that is bad news

[Triplexbee]

Pack 1 is knacked. Still not detecting the sixth cell, oh well ya live and learn.

The cellpro looks to have fully recovered the other pack but I guess only its lifespan will tell whether there was any lasting damage.

moyesboy, for sure now I will ALWAYS check the cell count amongst other things before walking away. Like I said before lesson learned.

It is a bit of long un Rob, I read the unabridged version of your post thanks for the tips.

So overall today I have felt frustration, confusion, relief and embarrassment, but above all I am grateful for the help you guys have shown in pointing this noob in the right direction.

Now its on to the PS3 to shoot em' up.

Matt

[Ashley Davis]

So overall today I have felt frustration, confusion, relief and embarrassment

Sounds like a normal trip to the field for a fly

[trebor27]

Nice one mate! Don't worry about the embarrassment it happens to us all!

If, once your all sorted, you fancy popping out for a fly you know where I am!

I ditched my Protech Sunday evening after getting back from town! (just before dusk)... Remember how I said I've not properly crashed a heli yet.... I should have touched wood! haa haa!

I was hovering tail in and I just lost control... I don't know it if was hardware failure as it started acting weird, but I suspect it might have just been DUMB THUMB and I'm grasping at straws to hide my shame! Oh well!
1x bent main shaft
1x bent feathering spindle
2x knackered main bearings
blades survived fine with mud up to about 3 inches in from the blade tips! (yikes)

So don't worry... That crash was embarrassing too...

Cheers
Rob

[Mexxan]

Had exactly the same Matt (without the puff) - Outrage 6s from Blink. Info / advice on O.T. point's to me wasting it by running the Rx to long and draining it - but the one cell being 0.00v is still bothering me - although due to my noob 'skills' I'd pretty much agree that it's a lesson learned on how not to run a lipo. Now your's has gone to - I'm a little suspect though as I think they were bought around the same time.

[Ashley Davis]

There's nothing to suspect, the packs in this thread were cleared of any problems, they were both charged incorrectly (ie. cell 6 wasn't charged at all) and then used.

I'm not entirely sure what happened with your pack, the suspicion was being used too long on the rx but that doesn't really account for one cell being totally dead. From the available information I don't think we will ever work it out.

[Triplexbee]

Ash is right, total inexperience and stoooopidity on my part

[Cskinner]

Ah ha... sounds like you over-discharged the pack. If you go on the helifreak forums and the trex 500 sections there isa post by Boddan who had an identicle problem. His 6s pack started to appear as a 5s pack on his charger, and it turned out he had gone past the 80% rule. Go check it out, and im sure youll find your answer there. Heres the link below

http://www.helifreak.com/showthread.php?t=100693

Hope it helps.

Chris

[Mexxan]

Yup Ash - definitely still scratching my head on the totally flat cell - but no doubting reason for my pack being dead is down to me being a dimlo. 1st dead pack? Part of the learning process; 2nd dead pack from over discharging? it's time to go back to 4 wheel rc and just dream about ever flying.

[Ashley Davis]

yeah, sucks when this sort of thing happens. Put it down to experience get some more packs and try to grin about it. Look on the bright side, it wasn't a 6S 5000 costing over £150