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Subject: Re: [LML] Odyssey Battery stack on Firewall - life time
From: Colyn Case <colyncase@earthlink.net>
In-Reply-To: <list-6562700@logan.com>
Date: Thu, 24 Oct 2013 09:18:23 -0400
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References: <list-6562700@logan.com>
To: "Lancair Mailing List" <lml@lancaironline.net>

Hi Ralf,

Those look like Odyssey's.   My experience with Odysseys is that they =
are picky about charging voltages and when they fail they tend to fail =
suddenly.   I would suggest going to the Odyssey website and finding =
their detailed charging instructions, then take the batteries out of the =
plane and charge as directed, one at a time.  (You may need to buy a new =
charger) See how the voltages look and then make a decision.  =20

I think if I had a single bus electrical system, I might consider =
reverting to a flooded aircraft battery.
I don't really have a scientific justification for that.   ...Just that =
in 13 years of aircraft ownership I have toasted zero flooded batteries =
and 2 pair of Odyssey's.

Colyn

On Oct 24, 2013, at 9:04 AM, <bronnenmeier@GROBSYSTEMS.COM> =
<bronnenmeier@GROBSYSTEMS.COM> wrote:

Dear subscribers,

I got a 2x12V=3D24V battery stack on the firewall behind the oil cooler =
-
see picture

I started flying the plane in May2011 with about 350hrs since then.

I bought the batteries probably early 2010 and used them during the
start-up process of the electrical systems in the plane.

Last week I thought the first crank revolution during starting felt kind
of weak - what kind of life can I expect out of them?

Does it just get weaker and don't start the engine anymore or would it
more likely die sudden at night in IMC?

I don't have an electrical back up but vacuum instruments and a
flashlight in the cockpit.

Thanks for your input

Ralf

-----Original Message-----
From: Chris Zavatston [mailto:chris_zavatson@yahoo.com]=20
Sent: Tuesday, October 22, 2013 7:54 AM
To: lml@lancaironline.net
Subject: Re: [LML] Re: Odyssey PC680 Batteries on Firewall -- Cool
Enough?


Why was it smoking?  Overcharging?

Sent from my spiffy iPhone

On Oct 21, 2013, at 5:02 PM, Colyn Case <colyncase@earthlink.net> wrote:

> I haven't been a fan of batteries behind the firewall since my friend
had his battery start smoking IMC in a Cessna 210.  He made it but it
wasn't pretty.
>=20
> On Oct 21, 2013, at 3:58 PM, Steve Colwell wrote:
>=20
> Ditto.. put the battery or batteries behind the seat too if the CG (or

> your
> A/C) will allow.  Our CG with Pump and 3, 20 amp Panasonic Batteries=20=

> behind the seats (Hartzell 3 blade) is near the fwd. limit with=20
> Claudette solo, no bags and minimum fuel.
>=20
> Steve Colwell  Legacy 550 RG
>=20
>=20
> Move your hydraulic pump from its current location.
> Create a small bulkhead and put the pump directly behind your seat.
> The reasons are too numerous to list!
> Don't even think twice about making this change.
> Equally important, locate your pump breaker within easy reach on your
panel.
>=20
> Angier Ames
> N4ZQ
> 69hrs
>=20
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>=20
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