![Matronics Email Lists Forum Index](templates/Matronics/images/logo_phpBB.gif) |
Matronics Email Lists Web Forum Interface to the Matronics Email Lists
|
View previous topic :: View next topic |
Author |
Message |
nuckollsr(at)cox.net Guest
|
|
Back to top |
|
![](templates/Matronics/images/spacer.gif) |
nuckollsr(at)cox.net Guest
|
Posted: Tue Jan 17, 2006 11:41 am Post subject: Hawker battery failure |
|
|
Further investigation into the puffed up battery confirmed
that the inter-cell walls got so hot that the plastic
stretched under pressure and after all the smoke (or should
I say steam?) cleared, the walls between cells was still
intact. They're running some cracking pressure tests on
the vent valves.
It's the opinion of those who've tested a lot more batteries
than I that the event probably didn't take more than 20-30 minutes
under an over-charge current that a 40 to 60A alternator
would be capable of.
There's a new battery qualification document (DO-293) that
calls for 3v per cell at up to 8C amps be applied until
all the steaming is over. No fire allowed, no breaches
of battery case. I'm told that within 10 minutes of
application, RG batteries are steaming vigorously and
that the high energy activity is pretty well over in
30-40 minutes.
Looks like the Hawker would have passed this test okay
and that regulator failure was the proximate cause
of the event with outcome exacerbated by lack of active
notification of an OV condition and/or automatic termination
of the OV event.
Bob . . .
| - The Matronics AeroElectric-List Email Forum - | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Back to top |
|
![](templates/Matronics/images/spacer.gif) |
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You cannot attach files in this forum You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|