Today's Message Index:
----------------------
1. 12:39 AM - Re: AeroElectric-List Digest: 3 Msgs - 11/30/22 (GLEN MATEJCEK)
2. 05:34 AM - Re: Re: AeroElectric-List Digest: 3 Msgs - 11/30/22 (Art Zemon)
3. 05:37 AM - Re: Seeking Battery Box for Group Size BTX20L Battery (Art Zemon)
4. 09:21 PM - Re: Seeking Battery Box for Group Size BTX20L Battery (Robert L. Nuckolls, III)
5. 09:22 PM - Re: Seeking Battery Box for Group Size BTX20L Battery (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: AeroElectric-List Digest: 3 Msgs - 11/30/22 |
Hi Art-
I wouldn't alter the battery box at all. In my case, I used plywood to
shim the battery. Should I want to go back to a 'standard' sized battery
in the future, all I have to do is scrap the shims. Easy, and offers
future flexibility.
FWIW-
> > I decided to try a cheap AGM battery in my airplane and it is working
> > great. So well that I want to swap out the large battery box for one
> > that is smaller and fits more nicely. But my battery (Super Start
> > Power Sport Battery
> > <
> https://www.oreillyauto.com/detail/c/power-sport-agm/more-powersport/atv---motorcycle-accessories/batteries/adae772e612e/super-start-power-sport-battery-group-size-btx20l-agm/ssbn/etx20l?q=batteries&pos=0>)
>
> > is slightly larger than the EarthX batteries so their boxes won't fit.
> >
> > Battery Dimensions: 6 1/8 (h) x 3 1/2 (w) x 7 (l)
> > Group Size BTX20L
> >
> > Any thoughts on places to shop?
>
>
Message 2
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| Subject: | Re: AeroElectric-List Digest: 3 Msgs - 11/30/22 |
Glenn,
That was my initial approach. Now that the new battery has proven itself, I
know that I am not going back to a larger, heavier battery. This AGM has
proven itself through hot and cold weather to hold a charge better and
crank the engine faster.
I had to remove the engine for a rebuild. Since it is out of the way, I am
taking the opportunity to clean up some miscellaneous stuff in the engine
compartment, like swapping out the (now oversized) battery box.
Cheers,
-- Art Z.
On Thu, Dec 1, 2022 at 2:48 AM GLEN MATEJCEK <fly4grins@gmail.com> wrote:
> Hi Art-
> I wouldn't alter the battery box at all. In my case, I used plywood to
> shim the battery. Should I want to go back to a 'standard' sized battery
> in the future, all I have to do is scrap the shims. Easy, and offers
> future flexibility.
> FWIW-
>
>
>> > I decided to try a cheap AGM battery in my airplane and it is working
>> > great. So well that I want to swap out the large battery box for one
>> > that is smaller and fits more nicely. But my battery (Super Start
>> > Power Sport Battery
>> > <
>> https://www.oreillyauto.com/detail/c/power-sport-agm/more-powersport/atv---motorcycle-accessories/batteries/adae772e612e/super-start-power-sport-battery-group-size-btx20l-agm/ssbn/etx20l?q=batteries&pos=0>)
>>
>> > is slightly larger than the EarthX batteries so their boxes won't fit.
>> >
>> > Battery Dimensions: 6 1/8 (h) x 3 1/2 (w) x 7 (l)
>> > Group Size BTX20L
>> >
>> > Any thoughts on places to shop?
>>
>>
--
My blog: CheerfulCurmudgeon.com
*Wrinkles mean you laughed. Grey hair means you cared. Scars mean you
lived.*
Message 3
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| Subject: | Re: Seeking Battery Box for Group Size BTX20L Battery |
Charlie,
That looks very nice. I'm hoping to be lazy but might well have to
fabricate something.
-- Art Z.
On Wed, Nov 30, 2022 at 7:24 PM Charlie England <ceengland7@gmail.com>
wrote:
> On 11/30/2022 5:26 PM, Art Zemon wrote:
>
> Folks,
>
> I decided to try a cheap AGM battery in my airplane and it is working
> great. So well that I want to swap out the large battery box for one that
> is smaller and fits more nicely. But my battery (Super Start Power Sport
> Battery
> <https://www.oreillyauto.com/detail/c/power-sport-agm/more-powersport/atv
---motorcycle-accessories/batteries/adae772e612e/super-start-power-sport-ba
ttery-group-size-btx20l-agm/ssbn/etx20l?q=batteries&pos=0>)
> is slightly larger than the EarthX batteries so their boxes won't fit.
>
> Battery Dimensions: 6 1/8 (h) x 3 1/2 (w) x 7 (l)
> Group Size BTX20L
>
> Any thoughts on places to shop?
>
> -- Art Z.
>
> Hi Art,
> I'd start in my scrap aluminum bin. ;-) Here's what I did for a firewall
> mount on my RV7 project. There's a 3/4x3/4x1/8 angle running under the
> bottom of the tray. The other pic shows my previous RV4's battery
> installation. Since its firewall has a 'step', I simply set the battery o
n
> the conveniently provided shelf and used a long stainless hose clamp to
> hold it down. Note that the -4 spent quite a bit of time in, shall we say
,
> unusual attitudes. Because these batteries only vent when horribly abused
,
> if yours is inside the fuselage all that should be required is at most
> something around the base to keep it from shifting sideways (can be short
> sections of light weight angle) and a strap over the top to hold it down.
>
> BTW, I'm sure that's a great battery, but I've been running the cheapest
> no-name AGMs I can find on Amazon or ebay for over 20 years. Prices have
> varied quite a bit depending on the price of lead, but I think the most
> I've paid is around $60. More typical is ~$40 for a 20-22AH battery. Some
> extra effort in reading spec sheets is required, but most in the 20AH ran
ge
> will start a Lyc without any issues. I've only had one early failure; I
> discovered a pinhole in one that was mounted in the -4 when it quit worki
ng
> after about 6 months. I'm certain it was already damaged when I installed
> it (likely shipping damage) and it took it 6 months to die. I typically g
et
> 4-5 years out of them unless I abuse them somehow, like forgetting the
> master after flying. I've recommended this technique to others as well, a
nd
> no one's complained yet.
>
> Hope that's useful info,
>
> Charlie
>
>
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm
_campaign=sig-email&utm_content=emailclient>
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>
--
My blog: CheerfulCurmudgeon.com
*=8B**=8BWrinkles mean you laughed. Grey hair means you cared.
Scars mean you
lived.*
Message 4
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| Subject: | Re: Seeking Battery Box for Group Size BTX20L Battery |
At 05:26 PM 11/30/2022, you wrote:
>Folks,
>
>I decided to try a cheap AGM battery in my airplane and it is
>working great. So well that I want to swap out the large battery box
>for one that is smaller and fits more nicely. But my battery
>(<https://www.oreillyauto.com/detail/c/power-sport-agm/more-powersport/atv---motorcycle-accessories/batteries/adae772e612e/super-start-power-sport-battery-group-size-btx20l-agm/ssbn/etx20l?q=batteries&pos=0>Super
>Start Power Sport Battery) is slightly larger than the EarthX
>batteries so their boxes won't fit.
Why are you putting a box around an SVLA battery?
The need for an enclosure is a legacy requirement
for dealing with fumes and leaks from flooded
batteries of yesteryear. Many were fitted with
drains that would take bubbled-up acidic
water overboard.
The SVLA battery contains so little liquid that
it's not possible for it to make an acidic
mess in the airplane.
All you need to do is capture the thing
mechanically.
http://aeroelectric.com/Pictures/Batteries/Battery_Install_OBrien_1.jpg
http://aeroelectric.com/Pictures/Batteries/Battery_Install_OBrien_2.jpg
http://aeroelectric.com/Pictures/Batteries/Battery_Install_OBrien_3.jpg
Some years back we did some studies on tensile strength
of straps with Velcro closures. Some 1" wide straps
with 6" of hook-n-loop engagement had a tensile
strength of over 300 pounds. Two of those strips
holding an SVLA battery in a shallow tray would
offer retention in well over a 20G event. Best
yet, you can secure the battery without tools!
Closing the battery up in a box only adds weight
and cost of ownership, it reduces the battery's
ability to reject heat.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 5
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| Subject: | Re: Seeking Battery Box for Group Size BTX20L Battery |
>Hi Art,
>I'd start in my scrap aluminum bin. ;-) Here's what I did for a
>firewall mount on my RV7 project. There's a 3/4x3/4x1/8 angle
>running under the bottom of the tray. The other pic shows my
>previous RV4's battery installation. Since its firewall has a
>'step', I simply set the battery on the conveniently provided shelf
>and used a long stainless hose clamp to hold it down. Note that the
>-4 spent quite a bit of time in, shall we say, unusual attitudes.
>Because these batteries only vent when horribly abused, if yours is
>inside the fuselage all that should be required is at most something
>around the base to keep it from shifting sideways (can be short
>sections of light weight angle) and a strap over the top to hold it down.
>
>BTW, I'm sure that's a great battery, but I've been running the
>cheapest no-name AGMs I can find on Amazon or ebay for over 20
>years. Prices have varied quite a bit depending on the price of
>lead, but I think the most I've paid is around $60. More typical is
>~$40 for a 20-22AH battery. Some extra effort in reading spec sheets
>is required, but most in the 20AH range will start a Lyc without any
>issues. I've only had one early failure; I discovered a pinhole in
>one that was mounted in the -4 when it quit working after about 6
>months. I'm certain it was already damaged when I installed it
>(likely shipping damage) and it took it 6 months to die. I typically
>get 4-5 years out of them unless I abuse them somehow, like
>forgetting the master after flying. I've recommended this technique
>to others as well, and no one's complained yet.
>
>Hope that's useful info,
Way cool Charlie . . .
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
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