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bigginsking
Joined: 25 Sep 2012
Posts: 27
Location: San Diego, California
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 Posted: Sat May 10, 2014 10:29 pm Post subject: EarthX fire |
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I've been kicking around the idea of getting rid of the 2 PC625s that I lug around and getting lithium batteries, I could probably save 20 lbs, but every time I get close I read about this sort of thing:http://advrider.com/forums/showpost.php?p=24135454&postcount=9894
So I'll probably wait a few more years...
Bill Judge
N84WJ, RV-8, 1012 hrs
RV-8.blogspot.com
[quote][b]
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Bill Judge
N84WJ, RV-8 |
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flying-nut(at)cfl.rr.com
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| Posted: Sun May 11, 2014 4:54 am Post subject: EarthX fire |
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Lithium Ion and Lithium Polymer batteries are sensitive to thermal runaway ...... and once started are near impossible to stop. Their charge profiles are also different from flooded/gel batteries. Even the 'experts' get it wrong .... Use Bing to find 'dreamliner battery' to see the carnage. I'd wait a while before switching.
Linn
On 5/11/2014 2:27 AM, Bill Judge wrote:
[quote]I've been kicking around the idea of getting rid of the 2 PC625s that I lug around and getting lithium batteries, I could probably save 20 lbs, but every time I get close I read about this sort of thing: http://advrider.com/forums/showpost.php?p=24135454&postcount=9894
So I'll probably wait a few more years...
Bill Judge
N84WJ, RV-8, 1012 hrs
RV-8.blogspot.com
No virus found in this message.
Checked by AVG - www.avg.com
05/10/14 [b]
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dan.pat.b(at)gmail.com
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| Posted: Sun May 11, 2014 6:19 am Post subject: EarthX fire |
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Good MorningThe only lithium ion battery in my airplane is in my cell phone - no way I would go beyond that - the risk of thermal runaway too high and the potential consequences catastrophic - no thanks - fly safe
Dan Bergeron
RV-7A - N307TB
500+ hours since first
flight Aug 6, 2009
On Sun, May 11, 2014 at 8:53 AM, Linn Walters <flying-nut(at)cfl.rr.com (flying-nut(at)cfl.rr.com)> wrote:
[quote] Lithium Ion and Lithium Polymer batteries are sensitive to thermal runaway ...... and once started are near impossible to stop. Their charge profiles are also different from flooded/gel batteries. Even the 'experts' get it wrong .... Use Bing to find 'dreamliner battery' to see the carnage. I'd wait a while before switching.
Linn
On 5/11/2014 2:27 AM, Bill Judge wrote:
| Quote: |
t="_blank">http://www.matronics.com/Navigator?RV-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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[b]
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jluckey(at)pacbell.net
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| Posted: Sun May 11, 2014 8:33 am Post subject: EarthX fire |
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Bill,
I use Li-po batts in my R/C model airplanes and they are great for that application, HOWEVER, they require a fair amount of care. They need a special charger; they are extremely sensitive to over-charging & being drained below a certain voltage. Generally they are very temperamental and need lot of baby-sitting. They are great for R/Cs because they are half the weight of alternatives but I track each charge, the number of cycles, etc for each pack that I own and generally treat them w/ a lot of respect.
As other posters have mentioned, when they fail, it can be spectacular. I once watched a Nissan hatchback burn to the tires at my local model flying field because the owner was charging a lipo pack in the back seat.
I don't think they are ready for prime time in Experimental aircraft. I think that there have been some articles in Kit Planes recently about this subject and I believe the author reaches the same conclusion.
-Jeff
From: Dan Bergeron <dan.pat.b(at)gmail.com>
To: rv-list(at)matronics.com
Sent: Sunday, May 11, 2014 7:18 AM
Subject: Re: EarthX fire
Good MorningThe only lithium ion battery in my airplane is in my cell phone - no way I would go beyond that - the risk of thermal runaway too high and the potential consequences catastrophic - no thanks - fly safe
Dan Bergeron
RV-7A - N307TB
500+ hours since first
flight Aug 6, 2009
On Sun, May 11, 2014 at 8:53 AM, Linn Walters <flying-nut(at)cfl.rr.com (flying-nut(at)cfl.rr.com)> wrote:
[quote] Lithium Ion and Lithium Polymer batteries are sensitive to thermal runaway ...... and once started are near impossible to stop. Their charge profiles are also different from flooded/gel batteries. Even the 'experts' get it wrong .... Use Bing to find 'dreamliner battery' to see the carnage. I'd wait a while before switching.
Linn
On 5/11/2014 2:27 AM, Bill Judge wrote:
| Quote: |
t="_blank">http://www.matronics.com/Navigator?RV-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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http://www.matro====================
[b]
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http://www.matronics.com/Navigator?RV-List |
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JohnInReno
Joined: 08 Sep 2007
Posts: 150
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| Posted: Sun May 11, 2014 9:45 am Post subject: EarthX fire |
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Jeff,
Please be sure to distinguish between Li-po and Lithium Iron Phosphate (LiFePO4). The Iron Phosphate chemistry holds some promise for experimental aviation. The LiPo chemistry used in R/C planes does not.
john
On 5/11/2014 9:31 AM, Jeff Luckey wrote:
[quote] Bill,
I use Li-po batts in my R/C model airplanes and they are great for that application, HOWEVER, they require a fair amount of care. They need a special charger; they are extremely sensitive to over-charging & being drained below a certain voltage. Generally they are very temperamental and need lot of baby-sitting. They are great for R/Cs because they are half the weight of alternatives but I track each charge, the number of cycles, etc for each pack that I own and generally treat them w/ a lot of respect.
As other posters have mentioned, when they fail, it can be spectacular. I once watched a Nissan hatchback burn to the tires at my local model flying field because the owner was charging a lipo pack in the back seat.
I don't think they are ready for prime time in Experimental aircraft. I think that there have been some articles in Kit Planes recently about this subject and I believe the author reaches the same conclusion.
-Jeff
From: Dan Bergeron <dan.pat.b(at)gmail.com> (dan.pat.b(at)gmail.com)
To: rv-list(at)matronics.com (rv-list(at)matronics.com)
Sent: Sunday, May 11, 2014 7:18 AM
Subject: Re: EarthX fire
Good Morning The only lithium ion battery in my airplane is in my cell phone - no way I would go beyond that - the risk of thermal runaway too high and the potential consequences catastrophic - no thanks - fly safe
Dan Bergeron
RV-7A - N307TB
500+ hours since first
flight Aug 6, 2009
On Sun, May 11, 2014 at 8:53 AM, Linn Walters <flying-nut(at)cfl.rr.com (flying-nut(at)cfl.rr.com)> wrote:
| Quote: | Lithium Ion and Lithium Polymer batteries are sensitive to thermal runaway ...... and once started are near impossible to stop. Their charge profiles are also different from flooded/gel batteries. Even the 'experts' get it wrong .... Use Bing to find 'dreamliner battery' to see the carnage. I'd wait a while before switching.
Linn
On 5/11/2014 2:27 AM, Bill Judge wrote:
http://www.matro====================
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[b]
| | - The Matronics RV-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?RV-List |
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John Morgensen
RV-9A - Born on July 3, 2013
RV4 - for sale |
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