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kahuna
Joined: 02 Feb 2007
Posts: 93
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 Posted: Tue Feb 06, 2007 9:34 am Post subject: 3.7 lb, 600 cranking amp, 11.5 A-hr battery |
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Interesting battery. Message is from the RV-List.
Thought this group might like to ponder it.
Mike
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sportav8r(at)gmail.com
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| Posted: Tue Feb 06, 2007 10:30 am Post subject: 3.7 lb, 600 cranking amp, 11.5 A-hr battery |
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What's that work out to- about $50/pound for weight savings over a
PC-625? I'd pay that to lighten an airframe, but for an item that was
permanent, not one that needed periodic replacement... how long will
this battery hold up in the aircraft environment?
-Bill B
On 2/6/07, Stewart, Michael (ISS Atlanta) <mike.stewart(at)us.ibm.com> wrote:
| Quote: |
Interesting battery. Message is from the RV-List.
Thought this group might like to ponder it.
Mike
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William.P.Dube(at)noaa.go
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| Posted: Tue Feb 06, 2007 12:23 pm Post subject: 3.7 lb, 600 cranking amp, 11.5 A-hr battery |
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The cells have a rated cycle life (to 50% capacity) of 10,000 cycles. If
you just have 10% capacity loss to 90% capacity, the cycle life is 2000
cycles. If you start your airplane once per day (with a _really_ long
cranking period) this would work out to something between 5 and 20
years. The 50% capacity would roughly be 50% loss in cranking amps, so
this would be probably the longest you would likely keep the battery.
Of course, if you leave the master on for a couple of days and flatten
the battery, you would likely have to replace it, just like a typical
lead-acid sealed battery.
Bill Dube'
Bill Boyd wrote:
| Quote: |
<sportav8r(at)gmail.com>
What's that work out to- about $50/pound for weight savings over a
PC-625? I'd pay that to lighten an airframe, but for an item that was
permanent, not one that needed periodic replacement... how long will
this battery hold up in the aircraft environment?
-Bill B
On 2/6/07, Stewart, Michael (ISS Atlanta) <mike.stewart(at)us.ibm.com>
wrote:
>
> Atlanta)" <mike.stewart(at)us.ibm.com>
>
> Interesting battery. Message is from the RV-List.
> Thought this group might like to ponder it.
> Mike
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