Today's Message Index:
----------------------
1. 12:30 AM - Re: Lithium battery (Keith.Miller@esa.int)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Lithium battery |
Scott
For the Io240 continental the issue is not the alternator but the coupling
which is an engine part supplied by continental and not part of the
alternator , but it would be a good idea to talk to Plane power to see what
they suggest is the best way of limiting the demand on their alternator - as
i suspect your Tr1 is like mine it only needs a few amps output.
My coupling was getting old before it broke (400+ hrs ), so maybe that was
a contributing factor as well. When I spoke with Aircraft quality
accessories ( they do a refurbish/ replacement service on the couplings for
about 600$ ) , they said it was a regular replacement part ( 2 to 3 per
week ) ,and they did quite good business out of this part. ,they also told
me that they get more orders in the hot summer months , when owners are
switching on the Airco and loading the alternator to a max before they get
into the air, and that it is unlikely to survive for long periods when
there is a max current draw from the 60amp TCM alternator.
Correction to my previous email on the subject . My baseline battery is
actually a Concorde RG 25XC.
Keith
From: Scott Stearns <sstearns2@yahoo.com>
To: "kis-list@matronics.com" <kis-list@matronics.com>,
Date: 05/20/2015 06:31 PM
Subject: Re: KIS-List: Lithium battery
Sent by: owner-kis-list-server@matronics.com
Thanks Keith. Very interesting. I have a plane power alternator. Have to
talk to them...
Scott
From: "Keith.Miller@esa.int" <Keith.Miller@esa.int>
Sent: Wednesday, May 20, 2015 12:49 AM
Subject: Re: KIS-List: Lithium battery
Scott
I had a less favourable experience with the Lithium iron phosphate
batteries in my TR1 with an Io240 , It was also a massive weight saving,
it turned the engine over much faster than the conventional lead battery
(Concorde RG28) , they can not explode or catch fire and they retain power
when left for long periods on doing nothing at no harm to
them .............BUT it destroyed my alternator coupling. These batteries
have an incredible ability to give up power ( hence the high cranking
ouptut ) , but they also an incredible ability to demand power back from
the alternator to recharge once they have given up the power.
With a standard charging continental charging system, the battery was
demanding as much power as the alternator would provide immediately after
start up , which was loading the alternator coupling in about the worst
possible conditions ( engine running slowly ) . After replacing the
coupling , I adopted a different start up technique which had the alternator
switched off , until after take off ( ie engine up to full running speed
before switching it on ).
I spoke to an lithium battery expert working on installations for space
craft and she told me that they are incredible batteries , but you must
have a charging system that has been designed for them , and that lead acid
charging systems are not !! ( no matter what the supplier says) - hence the
reason you need a special charger to charge them at home. She gave me some
advice about putting in more resistance from the alternator to the battery
which would prevent 60 amps being drawn from the alternator.
This type of battery would have worked on some older continentals with a
direct metal spigot drive or a Lyco, (since all that would happen is the
alternator belt would slip). but the Io240 has a non replaceable glued
rubber drive which is designed to break if the loads are too high ( and
they cost about 600$ and a lot of downtime to replace ) .
just my 2cts worth on the subject .
Keith
.
From: Scott Stearns <sstearns2@yahoo.com>
Subject: KIS-List: Lithium battery
Sent by: owner-kis-list-server@matronics.com
I just put an EarthX Lithium battery in my TR-1. I replaced an odyssey 680
battery with an earthX ETX-36, 4 pounds . The lithium is 12 pounds lighter
which really helped my CG. It cranks the engine like crazy. Engine is an
IO-360 with 10:1 compression. It really cranks it, way better than the
lead/acid.
$400 for the ETX-36 with charger. Not cheap, but it really helped with my
CG.
This is the much safer Lithium Iron Phosphate chemistry not the Lithium
Cobalt chemistry that Boeing had all the problems with. The EarthX batteries
have built in logic to balance the cells and protect from over or under
voltage.
Scott
This message and any attachments are intended for the use of the addressee or
addressees only.
The unauthorised disclosure, use, dissemination or copying (either in whole
or in part) of its
content is not permitted.
If you received this message in error, please notify the sender and delete it
from your system.
Emails can be altered and their integrity cannot be guaranteed by the sender.
Please consider the environment before printing this email.
htsp; -Matt Dralle, List Adm=======
This message and any attachments are intended for the use of the addressee or addressees
only.
The unauthorised disclosure, use, dissemination or copying (either in whole or
in part) of its
content is not permitted.
If you received this message in error, please notify the sender and delete it from
your system.
Emails can be altered and their integrity cannot be guaranteed by the sender.
Please consider the environment before printing this email.
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|