Speedy11(at)aol.com
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 Posted: Fri Jun 26, 2009 6:31 am Post subject: Battery Proximity and mountingIn my opinion |
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In my opinion, the reasons you stated are not sufficient to warrant carrying around - for the lifetime of your airplane - and additional 15-20 Lbs of weight. The maintenance benefit is important, but doesn't require two batteries. Simply change out your single battery each year. As far as additional cranking power, I don't think you'll need it. I'm using only one of my two P680s to crank my IO-390 (with slightly higher than normal compression) and it spins over rapidly and starts easily.
Thus, I would not use those arguments as justification for installing two batteries.
FYI, I decided to install two batteries for the following reasons:
1. To have a completely redundant backup electrical system for use in IFR flight
2. To power airplane gadgets during start that are not happy with power fluctuations
3. To shift CG aft
My airplane weighed in 20 Lbs heavier than desired - the weight of one extra battery and bracket.
Stan Sutterfield
Do not archive
| Quote: | I intend to use to use two batteries for the maintenance benefits you
outline in your book and for the additional cranking power. |
Make your summer sizzle with fast and easy recipes for the grill.
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