[NSRCA-discussion] Dodged a Bullet Today!!!!

Wed Mar 22 06:40:21 AKST 2006

The best rule is to stick with well established safety procedures when
charging LiPo batteries. Only if LiPo users can't get that into their heads,
would sticking with glow be the best rule. At least they would stand less
chance of burning up their home or vehicle or killing someone.

It's simply a matter of being smarter than your equipment, and then acting
like it--every time :-)

It's usually the 'every time' part we humans have trouble with.

Rick

-------Original Message-------

From: DaveL322 at comcast.net
Date: 03/22/06 09:53:43
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Dodged a Bullet Today!!!!

For some people, sticking with glow might be the best solution.

Some have noted specific "No No's" with regard to charging lipos - there are
a number of universally agreed "Rules" that would have prevented this
situation (if followed), and there are a number of
theories/approaches/practices for safe charging, care, and handling of lipos
that also would have prevented this situation (if followed).  And in
particular, there are rules/practices specific to the 109 charger.  All of
these things are discussed in detail in many forums on RCU and RCGroups. 
From everything I've read, it is extremely rare to see a lipo flame when
good practices are being followed - but - the potential always exists, no
matter how small (keeping in mind potential hazards/situations are
everywhere in our daily lives).

Dave

-------------- Original message -------------- 
From: "Glenn Hatfield" <randy10926 at COMTEKMAIL.COM> 

> I would never hear anything from the back of the pea-cup truck. Maybe the
1st 
> rule is stick with glow. 
> Randy 
> 
> --- seefo at san.rr.com wrote: 
> 
> From: "Doug Cronkhite" 
> To: "'NSRCA Mailing List'" 
> Subject: Re: [NSRCA-discussion] Dodged a Bullet Today!!!! 
> Date: Tue, 21 Mar 2006 21:08:56 -0800 
> 
> Actually.. 
> 
> 
> 
> 1st rule of Li-po charging is.. Never charge unattended. 
> 
> 
> 
> 2nd rule is never charge in your car. 
> 
> 
> 
> Eric got really lucky and I suspect won't be doing either 1 or 2 again. 
> 
> 
> 
> -Doug 
> 
> ! 
> 
> 
> 
> _____ 
> 
> From: nsrca-discussion-bounces at lists.nsrca.org 
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Dean Pappas

> Sent: Tuesday, March 21, 2006 8:51 PM 
> To: NSRCA Mailing List 
> Subject: Re: [NSRCA-discussion] Dodged a Bullet Today!!!! 
> 
> 
> 
> Hey Evil, 
> 
> I'd rather be lucky than good: any day! 
> 
> And that's why you use a charger that looks at each tap, before charging,
in 
> order to determine the number of cells. The same problem exists when 
> dis-charging packs. That's how I trashed one cell in one of my 5Ses. 
> 
> Dean 
> 
> -----Original Message----- 
> From: nsrca-discussion-bounces at lists.nsrca.org on behalf of Grow Pattern 
> Sent: Tue 3/21/2006 6:04 PM 
> To: NSRCA Mailing List 
> Cc: 
> Subject: [NSRCA-discussion] Dodged a Bullet Today!!!! > 
> 
> http://www.rcuniverse.com/forum/m_4056141/an
chors_4064428/mpage_1/key_/ancho 
> r/tm.htm#4064428See picture on RCU.I had a bit of a set back today with my

> winter fun 40 sized glow to electricconversion. I had wanted to try the 
> Thunderpower 4200 instead of the Tanic3600. I set off to the field with a 
> borrowed Thunderpower 4200 mAh pack. Iset the Astroflight 109 to 2 Amps.
It 
> ent to stage 1 and was calibrating toa 3 cell pack and was well on its way

> to charging the pack, or at least so Ithought . I have done this 
> topping-it-up many times before. I set it on a 2Amp charge rate.I never
made 
> it to the field. I heard a light "Phuttt!" about ten minutesinto the 
> journey. I stopped the van and ran back to the back doors. Thebattery was 
> bloated and looking bad. I grabbed the Deans connectors andunplugged it. 
> Dangling it by the lead and as far away from my face aspossible I lowered
it 
> to the curbside.I then personally backed ! up and was about to move my van

> forward a bit . (Ihad just put 3! 
> 5 gallons in it!). Seemed like a good idea to get clear. Neverhad the 
> chance. The pack blew up in a ball of flame about a cubic yard insize and 
> proceeded to burn fiercely. I had grabbed the fire extinguisher butdecided

> not to use it.The local police joined me for a while and seemed more 
> interested in theplanes in the back of the van than the charred remains. I

> scraped all of thebits up to keep the country side pretty. Estimated that 
> the grass would growback soon, and went home.Fortunately I was able to get

> it out of the van before it blew up intoflames etc.Long and the short of
it 
> is. "Do not charge a fully charged battery with anautomatic charger"Dodged
a 
> BIG bullet today.....Regards,Eric.P.S. If 3 fully charged cells = 12 V
plus, 
> and 4 discharged cells = 12 Vplus, then how does the charger know which !
is 
> which? 
> __________________________________________ _____ 
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