REFLECTOR: Odyssey Battery
jewen at comporium.net
jewen at comporium.net
Wed May 9 22:01:31 CDT 2007
The PC680s seem to be rather popular. Depending on your load
requirements, you may also want to consider the PC925 it is 28 Ah. It is
a tight fit, but it does fit in my 173 RG. In fact I wil be using 2, one
stacked on top of the other. My loads may be a bit higher than normal
(ECU on an auto conversion, Glass Cockpit computer, and IFR) so I want all
the Ah I can fit. The 925 only costs $25 to $30 more than the 680, so in
my case I will be a bit more comfortable with the extra reserve. And I
may not need ballast when flying solo. Your mileage may vary.
Joe
On Wed, May 9, 2007 6:09 pm, John Tvedte wrote:
> Chuck,
>
>
> A B&C is a wound field starter - just like the inline high-torque
> Skytecs....
>
>
> The internal resistance of the AGM PC680 is very low - so it can provide
> high currents.
>
> I think you will find the combination of the B&C and PC680 (assuming #2
> wire) will start your engine just fine. That said - I think one needs to
> take into account what Pat said about OAT being zero, etc.
>
> Load analysis is what I suggest you think about - how much current are
> you drawing - during your mission - assuming IFR - and you have
> alternator failure... is 17Ah at that point enough.... capacity testing
> that battery? Notice that the Ah rating depends upon how fast of current
> draw - 20hr rate vs 100hr rate)
>
> In my case, I'm using a dual battery setup - and can cross feed - so 2
> PC680's.... 30.8lbs of battery....
>
>
> I'm not flying -
>
>
> John
> XL-FG
>
>
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