Lfp weight 10ah 1.15kg vs sla 9ah 3.2kg Michael
On 25/02/2013, at 9:12 PM, Matthew Gage <m...@knightschallenge.com> wrote: > However, there isn't much point at the moment > > The weight saving is small for the same capacity, but the cost difference is > huge. > > As an example, a 10Ah LiFePO4 battery in the "standard" size most of use > weighs 1.92kg. An equivalent 9Ah SLA weighs 2.55kg > > > > > > On 25/02/2013, at 21:33 , Matthew Scutter <yellowplant...@gmail.com> wrote: > >> What's (hopefully) getting popular in gliders now is lithium *iron* >> (LiFePO4) rather than lithium-ion. >> That one little r is the difference between a fireball and a sizzle >> [http://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery#Safety] >> >> On Mon, Feb 25, 2013 at 8:55 PM, Mark Newton <new...@atdot.dotat.org> wrote: >>> >>> On 25/02/2013, at 8:33 PM, Craig Vinall <craig.vin...@bigpond.com> wrote: >>> >>> Thought this may be of interest. I know that these batteries are becoming >>> popular in gliders; what do others think? Is there a potential fire risk? >>> >>> >>> Probably the wrong question to ask, given that you could just as easily >>> inquire into whether >>> there's a potential fire risk inherent in carrying around tanks of volatile >>> hydrocarbons. >>> >>> More useful questions would be, "Under what conditions can a fire start," >>> and, "Once it >>> has started, what can you do about it?" >>> >>> By my money, the worst parts about the event in NY weren't associated with >>> the fact that >>> the batteries caught fire; the worst bits were the fact that Boeing had >>> assured the FAA >>> that thermal runaway was impossible (it clearly wasn't) and the fact that it >>> took fire crews, >>> with all their training and specialized equipment, more than 40 minutes to >>> extinguish it. >>> >>> Could have been worse -- could have been over the Pacific somewhere at the >>> limits of >>> ETOPS. >>> >>> ANA has grounded their 787s until at least May, so there'll be a lot of time >>> to ponder those >>> issues before they start flying again. >>> >>> - mark >>> >>> >>> >>> _______________________________________________ >>> Aus-soaring mailing list >>> Aus-soaring@lists.internode.on.net >>> To check or change subscription details, visit: >>> http://lists.internode.on.net/mailman/listinfo/aus-soaring >> _______________________________________________ >> Aus-soaring mailing list >> Aus-soaring@lists.internode.on.net >> To check or change subscription details, visit: >> http://lists.internode.on.net/mailman/listinfo/aus-soaring > > _______________________________________________ > Aus-soaring mailing list > Aus-soaring@lists.internode.on.net > To check or change subscription details, visit: > http://lists.internode.on.net/mailman/listinfo/aus-soaring
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