Today's Message Index:
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0. 12:17 AM - Please Make A Contribution Today... (Matt Dralle)
1. 02:43 PM - charging system (steve feigley)
2. 02:51 PM - Re: charging system (Pete Christensen)
3. 03:04 PM - Re: charging system (Pete Christensen)
4. 03:18 PM - Re: charging system (Peter Jeffers)
5. 04:01 PM - Re: charging system (Gilles Thesee)
6. 04:20 PM - Re: charging system (Craig Payne)
7. 04:21 PM - Re: charging system (Guy Buchanan)
8. 06:24 PM - Re: charging system (rampil)
Message 0
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| Subject: | Please Make A Contribution Today... |
Dear Listers,
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Thank you in advance!
Matt Dralle
Matronics Email List and Forum Administrator
Message 1
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hey guys'
this is for the electronics types listening . I'm thinking of trying a lithium
ion type battery for my 912s for the considerable weight savings. the battery
calls for a charge rate of no more than 18 amps the 912 specs its elec. output
at 20 amps. does this nessesarally mean that it charges at that rate? also have
any of you tried one of theese batt, if so which brand from where?
Message 2
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| Subject: | Re: charging system |
Are you going to make up the battery yourself or use one made for aircraft? Y
ou can blow a couple hundred bucks in a heartbeat if you over charge one.
Pete
Sent from my iPad
On Nov 27, 2011, at 4:40 PM, steve feigley <fygdog@yahoo.com> wrote:
> hey guys'
> this is for the electronics types listening . I'm thinking of trying a lit
hium ion type battery for my 912s for the considerable weight savings. the b
attery calls for a charge rate of no more than 18 amps the 912 specs its ele
c. output at 20 amps. does this nessesarally mean that it charges at that ra
te? also have any of you tried one of theese batt, if so which brand from wh
ere?
>
>
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Message 3
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| Subject: | Re: charging system |
U-Fly-It advertises one they say is more or less a drop in replacement for y
our regular battery and will charge off your existing alternator/ regulator.
Pete
On Nov 27, 2011, at 4:50 PM, Pete Christensen <pchristensen10@austin.rr.com>
wrote:
> Are you going to make up the battery yourself or use one made for aircraft
? You can blow a couple hundred bucks in a heartbeat if you over charge one.
>
> Pete
>
>
> Sent from my iPad
>
> On Nov 27, 2011, at 4:40 PM, steve feigley <fygdog@yahoo.com> wrote:
>
>> hey guys'
>> this is for the electronics types listening . I'm thinking of trying a li
thium ion type battery for my 912s for the considerable weight savings. the b
attery calls for a charge rate of no more than 18 amps the 912 specs its ele
c. output at 20 amps. does this nessesarally mean that it charges at that ra
te? also have any of you tried one of theese batt, if so which brand from wh
ere?
>>
>>
>>
>
>
>
Message 4
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Weight saving is a good thing but be cautious of what reduced weight could
do to your weight and balance. I know of at least one person who was going
to fit one of these batteries and then discovered that he needed ballast to
correct the c of g.
Pete
_____
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Pete
Christensen
Sent: 27 November 2011 22:51
Subject: Re: RotaxEngines-List: charging system
Are you going to make up the battery yourself or use one made for aircraft?
You can blow a couple hundred bucks in a heartbeat if you over charge one.
Pete
Sent from my iPad
On Nov 27, 2011, at 4:40 PM, steve feigley <fygdog@yahoo.com> wrote:
hey guys'
this is for the electronics types listening . I'm thinking of trying a
lithium ion type battery for my 912s for the considerable weight savings.
the battery calls for a charge rate of no more than 18 amps the 912 specs
its elec. output at 20 amps. does this nessesarally mean that it charges at
that rate? also have any of you tried one of theese batt, if so which brand
from where?
Message 5
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| Subject: | Re: charging system |
steve feigley a crit :
> hey guys'
> this is for the electronics types listening . I'm thinking of trying a
> lithium ion type battery for my 912s for the considerable weight
> savings. the battery calls for a charge rate of no more than 18 amps
> the 912 specs its elec. output at 20 amps. does this nessesarally mean
> that it charges at that rate? also have any of you tried one of theese
> batt, if so which brand from where?
>
> *
> *
Hi Steve,
What is the weight saving expected from the change ? The 912S starts and
runs very well with a 2,7 kg SBS8 Hawker lead-acid (VRLA), so is the
gain really worth the $ and trouble ?
Some info here http://contrails.free.fr/elec_bat_rg.php (mostly in
French, I'm afraid ;-), with lots of documentation at the bottom of the
page.
Best regards,
--
Gilles
http://contrails.free.fr
Message 6
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Note that the batteries offered by U-Fly-It are lithium iron phosphate
(LiFePO4), not the more common lithium cobalt oxide batteries (LiCoO2).
Other types of lithium ion batteries need to be carefully charged to
prevent thermal run-away, rupture and possibly a fire. This is one
reason why there are not drop-in lithium ion replacements for
conventional battery sizes like AA, C, D, etc.
http://www.uflyit.com/new_page_57.htm
http://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery
http://en.wikipedia.org/wiki/Lithium-ion_batteries#Safety_requirements
-- Craig
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Pete
Christensen
Sent: Sunday, November 27, 2011 3:03 PM
Subject: Re: RotaxEngines-List: charging system
U-Fly-It advertises one they say is more or less a drop in replacement
for your regular battery and will charge off your existing alternator/
regulator.
Pete
On Nov 27, 2011, at 4:50 PM, Pete Christensen
<pchristensen10@austin.rr.com> wrote:
Are you going to make up the battery yourself or use one made for
aircraft? You can blow a couple hundred bucks in a heartbeat if you over
charge one.
Pete
Sent from my iPad
On Nov 27, 2011, at 4:40 PM, steve feigley <fygdog@yahoo.com> wrote:
hey guy s'
this is for the electronics types listening . I'm thinking of trying a
lithium ion type battery for my 912s for the considerable weight
savings. the battery calls for a charge rate of no more than 18 amps the
912 specs its elec. output at 20 amps. does this nessesarally mean that
it charges at that rate? also have any of you tried one of theese batt,
if so which brand from where?
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Message 7
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| Subject: | Re: charging system |
On 11/27/2011 2:40 PM, steve feigley wrote:
> this is for the electronics types listening . I'm thinking of trying a
> lithium ion type battery for my 912s for the considerable weight
> savings. the battery calls for a charge rate of no more than 18 amps
> the 912 specs its elec. output at 20 amps. does this nessesarally mean
> that it charges at that rate? also have any of you tried one of theese
> batt, if so which brand from where?
I like the idea that if you have a particular type of charging failure
your battery catches fire. I understand it's a rather hot fire too.
Always exciting.
Guy Buchanan
Ramona, CA
Kitfox IV-1200 / 912-S / Warp 3cs / 500 hrs. and grounded
Now a glider pilot, too.
Message 8
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| Subject: | Re: charging system |
I also agree that the incentive to use an "exotic" battery for
a Rotax starter must be minimal.
The Rotax requires only a small lead-based battery, not much weight
saved compared with what's required for spinning up a TIO550!
The reference articles provided note that LiPo batteries don't overheat
(the old Halt & Catch Fire command) like LiCo, but do they just die
quietly when overcharged like LiCo?
If you're not expert enough to completely understand the engineering
considerations in switching, I'd leave to someone else to be first.
Ira
(EE in a former life)
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=359512#359512
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