nuckollsr(at)cox.net
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 Posted: Tue Sep 05, 2006 7:21 am Post subject: Debating on an alternator or two batteries? |
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At 08:19 PM 9/4/2006 -0700, you wrote:
| Quote: | Hi Group, my name's Tony Gibson, I've been a lurker on the list for almost
a year now and am building a Sonerai 2L - read 550lb slightly underpowered
two place! 
I'm trying to take as much weight out of the plane as I can by keeping it
simple. There's a lot of reasons I'm considering two batteries rather
than a battery and an alternator. But saving a bit of weight isn't the
main reason, the fact that I can move the weight of battery where ever I
want in the plane is a big bonus for servicing it nevermind balancing, and
....the last thing I will do is put lead weight back into it!
I have an ignition system that draws ~1 amp and a single fuel pump that
draws another amp. I decided against the starter and the only other amp
draws will be two small Stratomaster instruments drawing less than half an
amp together. Total draw would be less than 2.5 Amps
With the right warning system to indicate a low primary battery I'm
wondering if something like a 3 - 5 Ah battery would be large enough for a
backup? What about the primary?
The downside of course is what would I do on a crosscountry trip? Argh!
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What engine/alternator combination are you considering?
Bob . . .
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