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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-745234@logan.com>
Subject: Re: [FlyRotary] Re: 2nd battery Re: Amps required to run engine & amp- hours available
Date: Fri, 18 Feb 2005 20:46:56 -0500
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Actually, I started out with two 25 AH concord RG batteries weight 22 lbs a
piece for a total of 44 lbs of battery.  I could have flown home on the
starter {:>).  I soon moved to two 17 AH Odyssey batteries at 14 lbs each
and after 5 years and the only use for the spare battery was a bit better
cranking on a cold morning, I am now down to one 17AH Odyssey weight 14 lbs.
So down from 44 lbs of battery to 14 lbs.  I have a alternator warning light
dead center in front of me on the upper part of the instrument panel.  The
only time it shows is after some heavy cranking on a cold morning for a few
seconds until the battery has recharged after engine start.

I also have a volt meter which is part of my instrument scan.

I agree with Bernie, lower 48 especially the Midwest/eastern part of the
country I think one battery is fine - now out west or Alaska then I would
probably carry two batteries.  Two alternators just not to my liking.

FWIW

Ed
----- Original Message -----
From: "Charlie England" <ceengland@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, February 18, 2005 8:26 PM
Subject: [FlyRotary] Re: 2nd battery Re: Amps required to run engine & amp-
hours available


> jbker@juno.com wrote:
>
> >Now THAT'S encouraging ... but I think I'll tote a spare anyway ..
> >what's 12#? ... Jim S.
> >---------------------------------
> >
> >Jim, I'm torn between 2nd battery. Tracy had one for a while, but no
longer and don't believe ED had one. Flying over the lower 48 without a 2nd
battery once I'm past 40 hours does not bother me, but think I will have the
option to run the 2nd one anytime I'm over water flights (a long time from
now!) or doing another flight to Alaska.
> >
> >Bernie
> >
> >
>
> For those that don't follow the Matronics Aeroelectic list, the
> moderator now recommends 2 alternators and only one battery, replaced at
> each annual inspection. His logic is that modern batteries like the
> Hawker, etc. are so reliable that you aren't any more likely to lose a
> battery *in flight* than a wing while alternators aren't quite that
> good. If the 2nd alt. is big enough to carry essential loads, it can be
> lighter than even the 12 lb battery & your endurance isn't battery
limited.
>
> A lot tougher to install, though.
>
> Charlie
>
>
>
>
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