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Still interested in Lithium batteries for your glider?
If you are still interested in Lithium batteries for your glider, read
this article on the cautions given model airplane users. He gives statistics and talks about safety aspects, including ways to avoid torching your car or your house. Here's the article: http://rcgroups.com/forums/showthread.php?t=209187 -- Change "netto" to "net" to email me directly Eric Greenwell Washington State USA |
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Eric Greenwell wrote:
If you are still interested in Lithium batteries for your glider, read this article on the cautions given model airplane users. He gives statistics and talks about safety aspects, including ways to avoid torching your car or your house. Here's the article: http://rcgroups.com/forums/showthread.php?t=209187 What type of batteries are in Ipaqs? |
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Lithium polymer
John Scott "Greg Arnold" wrote in message news:2Y7Wd.89$qf7.78@fed1read03... Eric Greenwell wrote: If you are still interested in Lithium batteries for your glider, read this article on the cautions given model airplane users. He gives statistics and talks about safety aspects, including ways to avoid torching your car or your house. Here's the article: http://rcgroups.com/forums/showthread.php?t=209187 What type of batteries are in Ipaqs? |
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On Fri, 04 Mar 2005 16:51:15 -0800, Eric Greenwell
wrote: If you are still interested in Lithium batteries for your glider, read this article on the cautions given model airplane users. He gives statistics and talks about safety aspects, including ways to avoid torching your car or your house. Here's the article: http://rcgroups.com/forums/showthread.php?t=209187 These are exactly the batteries that are powering nearly any mobile phone and any notebook that you can buy at the moment. By the way - an extremely exciting glider called Antares is also powered by them. [Yup - I asdmit that these are also the batteries that Nokia had to call back in the beginning some years ago because some scared their users...] It's not as bad as it sounds - you really have to rape a LiPo battery to get an exciting result (the same happens with NiCd batteries, too) - but so far the LiPo batteries need a more careful handlicg than a Pb battery, and the saved weight is not worth the effort in a glider imho. Yes - I regard the loading of a LiPo battery with the NiCd software as rape. Bye Andreas |
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"Eric Greenwell" wrote in message ... If you are still interested in Lithium batteries for your glider, read this article on the cautions given model airplane users. He gives statistics and talks about safety aspects, including ways to avoid torching your car or your house. Here's the article: http://rcgroups.com/forums/showthread.php?t=209187 -- Change "netto" to "net" to email me directly Eric Greenwell Washington State USA I spent a couple of days at the Academy of Model Aeronautics Convention which was in the Ontario, CA Convention Center a month before the SSA convention was in the same venue. SSA had a booth there. LiPo battery vendors were everywhere on the convention floor. Electric R/C helicopters and airplanes were being flown indoors all powered by LiPo batteries. I asked all the vendors about the "Fire/Explosion problem" with Lithium Polymer batteries. They said, "Sure, if you are dumb enough to use a charger designed for a lead acid battery." No one said there were any issues with the batteries IF you used the correct charger and didn't do something dumb like puncture a cell. It's worth noting that the model airplane guys use Li-Po cells in metal foil pouches instead of hard plastic boxes because they are lighter. Any Li-Po battery likely to be used in a glider will be in a hard, impact resistant case. The real problem is that 8AH, 14.8V Li-Po packs cost about $300. That's likely to drop by 50% in the next year. The only guy that claimed there was a problem was a guy in the parking lot. However, he was setting on a case of homebrew Nitro-Methane model engine fuel while puffing on a cigarette. I think his label said "Standback & Duck". Bill Daniels |
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Bill Daniels wrote: "Eric Greenwell" wrote in message ... If you are still interested in Lithium batteries for your glider, read this article on the cautions given model airplane users. He gives statistics and talks about safety aspects, including ways to avoid torching your car or your house. Here's the article: http://rcgroups.com/forums/showthread.php?t=209187 -- Change "netto" to "net" to email me directly Eric Greenwell Washington State USA I spent a couple of days at the Academy of Model Aeronautics Convention which was in the Ontario, CA Convention Center a month before the SSA convention was in the same venue. SSA had a booth there. LiPo battery vendors were everywhere on the convention floor. Electric R/C helicopters and airplanes were being flown indoors all powered by LiPo batteries. I asked all the vendors about the "Fire/Explosion problem" with Lithium Polymer batteries. They said, "Sure, if you are dumb enough to use a charger designed for a lead acid battery." No one said there were any issues with the batteries IF you used the correct charger and didn't do something dumb like puncture a cell. It's worth noting that the model airplane guys use Li-Po cells in metal foil pouches instead of hard plastic boxes because they are lighter. Any Li-Po battery likely to be used in a glider will be in a hard, impact resistant case. The real problem is that 8AH, 14.8V Li-Po packs cost about $300. That's likely to drop by 50% in the next year. The only guy that claimed there was a problem was a guy in the parking lot. However, he was setting on a case of homebrew Nitro-Methane model engine fuel while puffing on a cigarette. I think his label said "Standback & Duck". Bill Daniels Having flown Li-Po batteries in all range of radio controlled contraptions for a few years now, besides the charging risk, another is any - even momentary short circuit. I charge my packs with the appropriate charger in a heavy ceramic dog dish in case anything bad happens. Over the years, I have had packs swell (again using the correct charger) but nothing else bad or catastrophic. I had to throw a pack that I was working on out the back door once while soldering a connector on and shorted the leads with the soldering iron tip. The pack immediately caught fire - smoke and smelly bad stuff immediately! The prices continue to drop and there are a lot of chargers to choose from now but I will not be putting one in my airplane to save a few pounds. Losing the weight myself is a better option! Scott Elhardt |
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