Today's Message Index:
----------------------
1. 01:43 AM - Garmin Aera660 powered from aircraft bus (John M Tipton)
2. 02:58 AM - Swedish Bitcoin Pay 0.02 BTC today, get 2 BTC in 24 hours (goldbtc1)
3. 03:47 AM - Battery disconnect with dual battery and trickle charger (whodja)
4. 04:54 AM - 640744-602 Nike Air Max 98 University Red Release this Week (blair2019)
5. 06:00 AM - Re: Battery disconnect with dual battery and trickle charger (Charlie England)
6. 06:16 AM - Re: Adjustable pot prohibited ? (Robert L. Nuckolls, III)
7. 06:27 AM - Re: Adjustable pot prohibited ? (Bill Boyd)
8. 07:03 AM - Re: Adjustable pot prohibited ? (bob noffs)
9. 08:06 AM - Re: Battery disconnect with dual battery and trickle charger (Robert L. Nuckolls, III)
10. 08:24 AM - Re: Battery disconnect with dual battery and trickle charger (Robert L. Nuckolls, III)
11. 08:34 AM - Re: Adjustable pot prohibited ? (GTH)
12. 08:36 AM - Re: Garmin Aera660 powered from aircraft bus (Robert L. Nuckolls, III)
13. 09:31 AM - Re: Battery disconnect with dual battery and trickle charger (Charlie England)
14. 10:35 AM - Re: Re: When / where to use dielectric grease? (Robert L. Nuckolls, III)
15. 12:47 PM - Alternator Lead Wiring Component? (farmrjohn)
16. 02:25 PM - Re: Adjustable pot prohibited ? (jrevens)
17. 02:47 PM - Re: Garmin Aera660 powered from aircraft bus (John M Tipton)
18. 03:48 PM - Re: Re: When / where to use dielectric grease? (Kelly McMullen)
19. 04:44 PM - Re: Re: When / where to use dielectric grease? (Dick Tasker)
Message 1
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| Subject: | Garmin Aera660 powered from aircraft bus |
Hi Guys
We intend to mount a Garmin Aera660 semi potable GPS into our panel using an AirGizmo
mount, so far so good, with the wiring pack comes a 'cigar socket' power
plug, is it OK to cut this off and connect to the aircraft bus, or does the
cigar plug actually have a voltage reduction circuit inside.
Regards: John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487267#487267
Message 2
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| Subject: | Swedish Bitcoin Pay 0.02 BTC today, get 2 BTC in 24 |
hours
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Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487270#487270
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| Subject: | Battery disconnect with dual battery and trickle charger |
Im almost finished with my RV-10 build and Id like use my trickle charger
for both batteries on the ground. Ive been maintaining both batteries
during the build with an Odyssey battery charger and both batteries wired in
parallel.
My electrical system is designed with dual batteries, each having an Independent
system with separate battery contactors and a crossfeed relay.
Im thinking that I can leave the batteries wired in parallel and install a
battery disconnect switch between the + to each battery. This would enable me to
disconnect the parallel circuit after charging for flight. Worst case, I
Forget to disconnect them and they run parallel in flight.
Would an ACR automatic charging relay work better? Or split the + on the charger
to go to each battery.
Your comments are appreciated.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487271#487271
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| Subject: | 640744-602 Nike Air Max 98 University Red Release this |
Week
Since the exposure, it has received much attention. This new Air Max 98 red patent leather, which looks like Supreme x Nike, will finally be officially launched this week! Although the Nike Air Max 98 University Red (https://www.jordans2019shoes.com/product-category/nike-shoes/nike-air-max-98/) is slightly different in color and material, the eye-catching effect of the upper foot is not inferior to the trend! The halo of Supreme's joint name has faded, and it is easier to get started!
2019 Mens Jordans (https://www.2019mensjordans.com) recently has a lot of action. After a pair of CLOT x Nike Air Zoom Haven, he also exposed a new co-branded E.U. x Nike Air Force 1 High on Ins. It seems that the shoes of the shoes are not guaranteed. Speaking of E.U. Many people will be a bit strange, but you will remember the memories of Guan Xiges many times. That's right! That is Eu's iconic logo, and the opportunity for Eu was created by Guan Xi and former UNDEFEATED designer KB Lee saying I'm emotionally unavailable!, so he decided to create Emotionally Unavailable as a duo. Brand. From the figure we can find that this joint name uses the classic Air Force 1 High as the prototype. At the tongue label, the E.U. embroidered word replaces the Nike word, highlighting its unique co-branding status, while the high-profile version of the signature strap is also presented with the same elements. The biggest bright spot is undoubtedly the zipper structure replaces the traditional lace design, which is more visually impactful while being easy to put on and take off. In terms of color matching, the use of simple red and white color matching highlights the beauty of the hand. Although there is only one exposure map, Xiao Bian, with the clues on Ins, guessed that the red Air Force 1 High he wore during Fashion Week is the joint version. The right-hand zipper design is exactly the same, and the left foot maintains the traditional lace design, which is quite awkward.
Recently, the weather has gradually warmed up, and the weather is ready to wear running shoes. Today, 2019 Sneakers Release (https://www.2019sneakersrelease.com) has a new color scheme. Nike React Element 55 The overall body is a gradient blue with a white midsole and the side of the Swoosh in white for a refreshing feel. It is worth mentioning that this color matching upper is made of mesh fabric. It is not a translucent flap upper. You can choose this pair of running shoes in winter.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487272#487272
Message 5
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| Subject: | Re: Battery disconnect with dual battery and trickle |
charger
On Sat, Jan 26, 2019 at 5:54 AM whodja <whodja@gmail.com> wrote:
>
> I=99m almost finished with my RV-10 build and I=99d like use
my trickle
> charger
> for both batteries on the ground. I=99ve been maintaining both batt
eries
> during the build with an Odyssey battery charger and both batteries wired
> in
> parallel.
> My electrical system is designed with dual batteries, each having an
> Independent system with separate battery contactors and a crossfeed relay
.
> I=99m thinking that I can leave the batteries wired in parallel and
install
> a
> battery disconnect switch between the + to each battery. This would enabl
e
> me to disconnect the parallel circuit after charging for flight. Worst
> case, I
> Forget to disconnect them and they run parallel in flight.
> Would an ACR automatic charging relay work better? Or split the + on the
> charger to go to each battery.
> Your comments are appreciated.
>
>
If you bring the charge wire for each battery to a separate terminal in the
external charger connector, you can tie the two terminals together in the
mating connector that goes to the charger. Unplugging the charge cable
would break the connection between the batteries.
Now, the price for your answer: unrequested advice. :-)
I bought a 'no name' SLA battery through ebay back in mid November for a
Kolb project that won't fly until spring. I just checked its voltage, and
it's still at 12.8V. How long do you plan for the plane to sit between
flights? While some have had decent luck using 'maintainer' chargers on SLA
batteries, many have seen greatly reduced lifespans when using maintainers.
If the battery technology doesn't need it (extremely low self-discharge
rate), why risk it? Odyssey's technical documents will show you the
self-discharge rate for one of their healthy batteries.
Charlie
Message 6
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| Subject: | Re: Adjustable pot prohibited ? |
At 09:40 PM 1/25/2019, you wrote:
>
>Hello all,
>
>In the past few months I designed for some building buddies a small
>electronic device to close a relay when below a certain voltage.
>It includes a small multi turn potentiometer to adjust the 13.5 V or
>else set point. The device is currently under test.
>
>My intention was, once satisfied with the operation, to seal the
>potentiometer with a dab of varnish.
>
>But a friend just tells me that in aviation adjustable pots are
>prohibited, and that once adjusted, we should normally replace the
>potentiometer with fixed resistors or adequate value.
>Does anyone have further information about this rule ?
Never heard of it.
An off-the-shelf piece of avionics for
TC aircraft is subjected to a constellation
of environmental and performance qualification
tests.
Adjustable pots are becoming rare . . . they
live in an analog world rapidly being over
taken by digital . . . but there are hundreds
of pot styles that 'stay put' under
expected stresses. Hence, offer no concerns
for un-expected re-adjustment.
Bob . . .
Message 7
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| Subject: | Re: Adjustable pot prohibited ? |
Maybe it's a general prohibition on smuggling via aircraft?
My headsets use pots that are user accessible in flight. Scary.
On Sat, Jan 26, 2019 at 9:20 AM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 09:40 PM 1/25/2019, you wrote:
>
>
> Hello all,
>
> In the past few months I designed for some building buddies a small
> electronic device to close a relay when below a certain voltage.
> It includes a small multi turn potentiometer to adjust the 13.5 V or else
> set point. The device is currently under test.
>
> My intention was, once satisfied with the operation, to seal the
> potentiometer with a dab of varnish.
>
> But a friend just tells me that in aviation adjustable pots are
> prohibited, and that once adjusted, we should normally replace the
> potentiometer with fixed resistors or adequate value.
> Does anyone have further information about this rule ?
>
>
> Never heard of it.
>
> An off-the-shelf piece of avionics for
> TC aircraft is subjected to a constellation
> of environmental and performance qualification
> tests.
>
> Adjustable pots are becoming rare . . . they
> live in an analog world rapidly being over
> taken by digital . . . but there are hundreds
> of pot styles that 'stay put' under
> expected stresses. Hence, offer no concerns
> for un-expected re-adjustment.
>
>
> Bob . . .
>
Message 8
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| Subject: | Re: Adjustable pot prohibited ? |
one hit or two? sorry, couldn't resist.
On Sat, Jan 26, 2019 at 8:31 AM Bill Boyd <sportav8r@gmail.com> wrote:
> Maybe it's a general prohibition on smuggling via aircraft?
>
> My headsets use pots that are user accessible in flight. Scary.
>
> On Sat, Jan 26, 2019 at 9:20 AM Robert L. Nuckolls, III <
> nuckolls.bob@aeroelectric.com> wrote:
>
>> At 09:40 PM 1/25/2019, you wrote:
>>
>>
>> Hello all,
>>
>> In the past few months I designed for some building buddies a small
>> electronic device to close a relay when below a certain voltage.
>> It includes a small multi turn potentiometer to adjust the 13.5 V or else
>> set point. The device is currently under test.
>>
>> My intention was, once satisfied with the operation, to seal the
>> potentiometer with a dab of varnish.
>>
>> But a friend just tells me that in aviation adjustable pots are
>> prohibited, and that once adjusted, we should normally replace the
>> potentiometer with fixed resistors or adequate value.
>> Does anyone have further information about this rule ?
>>
>>
>> Never heard of it.
>>
>> An off-the-shelf piece of avionics for
>> TC aircraft is subjected to a constellation
>> of environmental and performance qualification
>> tests.
>>
>> Adjustable pots are becoming rare . . . they
>> live in an analog world rapidly being over
>> taken by digital . . . but there are hundreds
>> of pot styles that 'stay put' under
>> expected stresses. Hence, offer no concerns
>> for un-expected re-adjustment.
>>
>>
>> Bob . . .
>>
>
Message 9
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| Subject: | Re: Battery disconnect with dual battery and trickle |
charger
At 05:47 AM 1/26/2019, you wrote:
>
>I=99m almost finished with my RV-10 build and
>I=99d like use my trickle charger
>for both batteries on the ground. I=99ve been maintaining both
batteries
>during the build with an Odyssey battery charger and both batteries wired
in
>parallel.
>My electrical system is designed with dual
>batteries, each having an Independent system
>with separate battery contactors and a crossfeed relay.
>I=99m thinking that I can leave the batteries wired in parallel and
install a
>battery disconnect switch between the + to each
>battery. This would enable me to disconnect the
>parallel circuit after charging for flight. Worst case, I
>Forget to disconnect them and they run parallel in flight.
>Would an ACR automatic charging relay work
>better? Or split the + on the charger to go to each battery.
>Your comments are appreciated.
It's not real clear as to your proposed
architecture. Can you sketch it out, scan
or photograph and attach it?
Do you have dual alternators? Can you
enlighten us as to the failure modes
mitigated by this architecture?
Bob . . .
Message 10
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| Subject: | Re: Battery disconnect with dual battery and trickle |
charger
>
>I bought a 'no name' SLA battery through ebay back in mid November
>for a Kolb project that won't fly until spring. I just checked its
>voltage, and it's still at 12.8V. How long do you plan for the plane
>to sit between flights? While some have had decent luck using
>'maintainer' chargers on SLA batteries, many have seen greatly
>reduced lifespans when using maintainers. If the battery technology
>doesn't need it (extremely low self-discharge rate), why risk it?
>Odyssey's technical documents will show you the self-discharge rate
>for one of their healthy batteries.
If you have a demonstrated incident of
death-by-maintainer, then the maintainer
was (1) badly designed or (2) defective.
An 'ideal' recharge/maintenance plot
looks like this:
https://tinyurl.com/k6xr9mk
Here's a measured performance on
a Schumacher XC75 charger on a
100AH truck battery
https://tinyurl.com/k6xr9mk
Here's a plot on a Schumacher WM1562A
on a 20AH SLVA
https://tinyurl.com/mtqyhxb
Here's a Battery Tender Jr. on a 7AH
SVLA
https://tinyurl.com/b4td78b
While some do not closely follow the
'ideal' plots, they do achieve a top-off
followed by a drop-and-hold to the
maintenance level. I've been
using various charger/maintainer
products for decades on both vehicles
and lab batteries with expected
results: Some of my lab batteries are
over ten years old and still deliver
a substantial fraction of their
name-plate capacity. I.e. still
over 80%.
I've yet to test any Harbor Freight
maintainer that produces the necessary
performance . . . doesn't mean that
there are none . . . just that the
two I tested went into the round-file
and that was over 10 years ago.
While it's true that well constructed
SVLA batteries may not benefit greatly
from the use of a maintainer, it's
not a BAD thing to do either and
in some cases a necessary thing to do.
Bob . . .
Message 11
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| Subject: | Re: Adjustable pot prohibited ? |
/Le 26/01/2019 15:16, Robert L. Nuckolls, III a crit:
/
> /
> Never heard of it.
>
> [...]/
> / there are hundreds
> of pot styles that 'stay put' under
> expected stresses. Hence, offer no concerns
> for un-expected re-adjustment.
> /
Thank you sir !
So I'll stick to my trimmer and varnish.
--
Best regards,
Gilles
http://contrails.free.fr
http://lapierre.skunkworks.free.fr
Message 12
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| Subject: | Re: Garmin Aera660 powered from aircraft bus |
At 03:42 AM 1/26/2019, you wrote:
>
>Hi Guys
>
>We intend to mount a Garmin Aera660 semi potable GPS into our panel
>using an AirGizmo mount, so far so good, with the wiring pack comes
>a 'cigar socket' power plug, is it OK to cut this off and connect to
>the aircraft bus, or does the cigar plug actually have a voltage
>reduction circuit inside.
>
>Regards: John
Appendix D of the users manual describes
this item:
Emacs!
A 'bare' wire interface between the Aera660 and
ship's systems. Also, the manual speaks to an
internal, 3A fuse in the cigar-lighter plug.
This is a common connector to many automotive
add-ons. The fuse installation takes up a substantial
volume of the connector shell . . . it seems
very unlikely that it contains additional
electronics . . . a disassembly would confirm.
Bob . . .
Message 13
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| Subject: | Re: Battery disconnect with dual battery and trickle |
charger
On 1/26/2019 10:23 AM, Robert L. Nuckolls, III wrote:
>>
>> I bought a 'no name' SLA battery through ebay back in mid November
>> for a Kolb project that won't fly until spring. I just checked its
>> voltage, and it's still at 12.8V. How long do you plan for the plane
>> to sit between flights? While some have had decent luck using
>> 'maintainer' chargers on SLA batteries, many have seen greatly
>> reduced lifespans when using maintainers. If the battery technology
>> doesn't need it (extremely low self-discharge rate), why risk it?
>> Odyssey's technical documents will show you the self-discharge rate
>> for one of their healthy batteries.
>
> If you have a demonstrated incident of
> death-by-maintainer, then the maintainer
> was (1) badly designed or (2) defective.
>
> An 'ideal' recharge/maintenance plot
> looks like this:
>
> https://tinyurl.com/k6xr9mk <https://tinyurl.com/k6xr9mk>
>
> Here's a measured performance on
> a Schumacher XC75 charger on a
> 100AH truck battery
>
> https://tinyurl.com/k6xr9mk <https://tinyurl.com/k6xr9mk>
>
> Here's a plot on a Schumacher WM1562A
> on a 20AH SLVA
>
> https://tinyurl.com/mtqyhxb <https://tinyurl.com/mtqyhxb>
>
> Here's a Battery Tender Jr. on a 7AH
> SVLA
>
> https://tinyurl.com/b4td78b <https://tinyurl.com/b4td78b>
>
> While some do not closely follow the
> 'ideal' plots, they do achieve a top-off
> followed by a drop-and-hold to the
> maintenance level. I've been
> using various charger/maintainer
> products for decades on both vehicles
> and lab batteries with expected
> results: Some of my lab batteries are
> over ten years old and still deliver
> a substantial fraction of their
> name-plate capacity. I.e. still
> over 80%.
>
> I've yet to test any Harbor Freight
> maintainer that produces the necessary
> performance . . . doesn't mean that
> there are none . . . just that the
> two I tested went into the round-file
> and that was over 10 years ago.
>
> While it's true that well constructed
> SVLA batteries may not benefit greatly
> from the use of a maintainer, it's
> not a BAD thing to do either and
> in some cases a necessary thing to do.
>
>
> Bob . . .
>
Bob,
No disagreement that if everything is 'right', it'll be ok. But. The
fact remains that quite a few a/c-application SLA users that have
practiced maintainer continuous use, report relatively short lived
batteries. on the other hand, I don't recall ever hearing a report of
short battery life from someone who *doesn't* have a maintainer in
continuous service, even in planes that aren't regularly flown. My a/c
fits the latter category; it often goes longer than a month without
flying, and I've never had an issue with short battery life.
Given that SLAs can go many months with minimal self-discharge (begs the
question of need), and the risk of unintentional use of an incorrect or
defective charger, why go to the trouble? Now if it's going to sit for
a year...
Charlie
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
Message 14
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| Subject: | Re: When / where to use dielectric grease? |
At 12:45 AM 1/26/2019, you wrote:
>
>I can only comment from my experience on boats and docks. I have
>seen less corrosion problems on connections treated with dielectric
>grease. The difference can be seen in a matter of a couple of
>seasons, especially on ones that are removed and replaced
>frequently, such as removable anchor lights and cigar lighter type
>connectors. Admitted these are not high buck sealed connections
>designed for the harsh maritime environment, but using grease
>changes them from problematic designs to being reliable connectors.
. . . which re-enforces my point . . .
Dielectric greases are invaluable in cases
of environmental extremes. Salt air
would certainly be considered an extreme.
My first observations of how bad it
can be was on a trip to South Padre with
my young family about 50 years ago.
Got to know some commercial fisher
persons and spent some time on the
docks and boats . . .
There is a tank on the beach of
Culebra Island, PR that has been sitting
there since WWII. Dug around through
the interior a few years back.
Emacs!
The salt water has literally dissolved
major cross sections of steel. On the
other hand, one could have stored this
machine next to a tenant of the Davis
Monthan 'bone yard' . .
Emacs!
. . . and the machine might well be
operational with nothing more than some
fuel and a grease job.
A 4oz tube of DC4 has lasted me for
decades in KS . . . but in St. Pete
Beach? Maybe not so much.
Bob . . .
Message 15
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| Subject: | Alternator Lead Wiring Component? |
I'm trying to sort the wiring layout on my newly acquired plane. It has a TCM
60 alternator and Zeftronics 15100 regulator which has (I) (A) (S) (F) terminals.
The (S) terminal is not being used. The alternator has a single Field terminal
and a Bus terminal. There are two wires coming off the Bus terminal, one
to the bus, and the other that goes through what looks like either a condensor
or capacitor then to the (A) terminal on the regulator. The regulator is
powered via the cockpit switch, noise suppressor, then the (I) terminal. My question
is what is the condensor/capacitor component, and what does it do?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487287#487287
Attachments:
http://forums.matronics.com//files/alternator_607.jpg
Message 16
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| Subject: | Re: Adjustable pot prohibited ? |
FWIW, I had an older certified Alcor combination EGT/CHT gauge that used adjustable
pots. It eventually started to have intermittent problems on the CHT side.
The culprit was the little adjustable pot, and I replaced it with a precision
resistor. This was on my first homebuilt that I flew for 28 years.
--------
John Evens
Thorp T-18 N71JE (sold)
Kitfox SS7 N27JE (built & flying)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487288#487288
Message 17
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| Subject: | Re: Garmin Aera660 powered from aircraft bus |
Hi Bob
I've managed to get hold of a Garmin GPS lead, and the plug that goes into the
unit has four pins, two are dormant, the other two are 12v + & -, the cigar plug
once dismantled has indeed a glass fuse link, so all good for 12v fused to
the aircraft bus.
Which does raise one other question, the fuse looks like 1/4amp, how do I fuse
this (and other items like 'steam gauge lighting') which have only light gauge
wires, the smallest fuse available for the bus is 1amp
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487289#487289
Message 18
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| Subject: | Re: When / where to use dielectric grease? |
That must be an old picture of DM AFB. I believe one of the arms
treaties required the tails chopped off.
On 1/26/2019 10:34 AM, Robert L. Nuckolls, III wrote:
> At 12:45 AM 1/26/2019, you wrote:
>>
> There is a tank on the beach of
> Culebra Island, PR that has been sitting
> there since WWII. Dug around through
> the interior a few years back.
>
> Emacs!
>
> The salt water has literally dissolved
> major cross sections of steel. On the
> other hand, one could have stored this
> machine next to a tenant of the Davis
> Monthan 'bone yard' . .
>
>
> Emacs!
>
> . . . and the machine might well be
> operational with nothing more than some
> fuel and a grease job.
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| Subject: | Re: When / where to use dielectric grease? |
There are some there that are still intact. the treaty only required a certain
number to be destroyed.
Dick Tasker
Kelly McMullen wrote:
>
> That must be an old picture of DM AFB. I believe one of the arms treaties required
the tails chopped off.
>
> On 1/26/2019 10:34 AM, Robert L. Nuckolls, III wrote:
>> At 12:45 AM 1/26/2019, you wrote:
>>>
>> There is a tank on the beach of
>> Culebra Island, PR that has been sitting
>> there since WWII. Dug around through
>> the interior a few years back.
>>
>> Emacs!
>>
>> The salt water has literally dissolved
>> major cross sections of steel. On the
>> other hand, one could have stored this
>> machine next to a tenant of the Davis
>> Monthan 'bone yard' . .
>>
>>
>> Emacs!
>>
>> . . . and the machine might well be
>> operational with nothing more than some
>> fuel and a grease job.
>
>
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