Today's Message Index:
----------------------
1. 12:16 AM - Re: Electrical System Schematic Review (jonlaury)
2. 07:15 AM - 4 into 1 dsub connector (Chris Hukill)
3. 07:41 AM - Re: Low Voltage Warning Light (Mike Fontenot)
4. 08:59 AM - Another One (Harley)
5. 09:13 AM - Re: Another One (JOHN TIPTON)
6. 09:54 AM - Re: Another One (Harley)
7. 01:09 PM - Maybe a rewrite? (Fergus Kyle)
8. 03:36 PM - Re: Re: Electrical System Schematic Review (Robert L. Nuckolls, III)
9. 03:39 PM - Re: Maybe a rewrite? (Robert L. Nuckolls, III)
10. 03:54 PM - Re: 4 into 1 dsub connector (Robert L. Nuckolls, III)
11. 06:26 PM - Re: Electrical System Schematic Review (jonlaury)
12. 10:37 PM - Stan's concerns for starter contactor locations (revisited) (Robert L. Nuckolls, III)
Message 1
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Subject: | Re: Electrical System Schematic Review |
Z-Laury...I like it!
I need to get up to speed on the 9024 OVM and what it is capable of.
I already have an LR-3 that I was planning to use on the 60a alt.
This architecture is so simple that I hate to kluge it up, but I want a GPJ so
I will insert my GP /SB alt B lead contactor schematic and eliminate the SB alt
B lead diode.
Why is the 9024 more fuse friendly and why does it obviate the need for an alt
field CB?
Are you still seeing all engine essential power coming from the battery bus?
Ironic that this evolution started with my wanting to use Z-13/20 and you informed
me that you had pulled that Z-figure from the AEC book.
Cheers,
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=306290#306290
Message 2
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Subject: | 4 into 1 dsub connector |
I'm wiring my RV10 for the Dynon network and am looking for a source for
a high quality (OBAM) 9 pin Dsub connector that would split into 4. The
Dynon solution is multiple 2 into 1 harnesses, but a 4 into 1 splitter
would be a more elegant solution, if such a device exists. The ribbon
mount connectors that Bob had on the list isn't appropriate for aircraft
critical systems, I believe, nor is the ribbon of sufficient gauge, but
a solid multi connector would be. All the normal searches have struck
out for me, but maybe someone knows a source?
Chris Hukill
Message 3
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Subject: | Re: Low Voltage Warning Light |
For a low voltage light you are unable to ignore I installed on of these
Whelen stroble/flasters with my LR3 regular. Sits on the say, even a blind
dog can see it when it goes off.
http://www.galls.com/style.html?assort=general_catalog&style=GR309
On Sun, Jul 25, 2010 at 6:08 AM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> nuckolls.bob@aeroelectric.com>
>
> At 10:11 PM 7/24/2010, you wrote:
>
>>
>> Bob,
>> I am using an LR3 voltage regulator and a B&C 60 A alternator. Is it
>> acceptable to change out the supplied warning light for a red 12 volt led?
>>
>
> Yes, but the circuitry in the LR3 was designed
> to drive incandescent bulbs. You'll need to
> add some resistors to the LED circuit such that
> the LED mimics the bulb. See:
>
> http://aeroelectric.com/Pictures/Schematics/LR3_LV_Led_1.jpg
>
> It would be in my direct line of sight so I do not think the lack of
>> blinking would be an issue. That is if the blinking is a function of the
>> light and not the regulator. Please let me know if there would be
>> problems
>> with using an led and if it would blink/
>>
>
>
> The flasher is built into the LR3.
>
>
> Bob . . .
>
>
--
Mike
===============================
Mike Fontenot
Apex Consulting & Services LLC
Lakewood, Colorado
303 / 731-6645
mikef AT apexconsultingservices DOT com
===============================
Message 4
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Morning, Everyone...
Last item for awhile. I just listed my never used or even powered
up Trutrak Turn and Bank for sale on eBay. The Dynon I now have
includes these features, so I won't need it.
This model is now selling for $495. I have no minimum and no
reserve (well, I guess the minimum is the current bid! <G>), so,
as before with the EMS, someone is going to get a real deal!
For ALL the details and several pictures, just search eBay for
the item number 350376359107. Or just search using the term
"Trutrak"...there are a couple of them listed, but mine is the
low price one!
Harley Dixon
Long EZ N28EZ
Canandaigua, NY
Message 5
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Hi Harley
You don't seem to have included any postage details for outside the US.
Reagrds
John (England)
----- Original Message -----
From: Harley
To: undisclosed-recipients:
Sent: Monday, July 26, 2010 4:58 PM
Subject: AeroElectric-List: Another One
Morning, Everyone...
Last item for awhile. I just listed my never used or even powered up
Trutrak Turn and Bank for sale on eBay. The Dynon I now have includes
these features, so I won't need it.
This model is now selling for $495. I have no minimum and no reserve
(well, I guess the minimum is the current bid! <G>), so, as before with
the EMS, someone is going to get a real deal!
For ALL the details and several pictures, just search eBay for the
item number 350376359107. Or just search using the term
"Trutrak"...there are a couple of them listed, but mine is the low price
one!
Harley Dixon
Long EZ N28EZ
Canandaigua, NY
Message 6
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You're right, John...
I've just revised it, so they should be there shortly.
I drew this listing up from scratch instead of using a template,
and looks like I forgot to add the worldwide calculations to
it...even though the listing description does mention worldwide
shipping, it doesn't allow for actual numbers!
Thanks for bringing that up and I apologize..
Harley
-----------------------------------------------------------------
On 7/26/2010 12:09 PM, JOHN TIPTON wrote:
> Hi Harley
> You don't seem to have included any postage details for outside
> the US.
> Reagrds
> John (England)
>
> ----- Original Message -----
> *From:* Harley <mailto:harley@AgelessWings.com>
> *To:* undisclosed-recipients: <mailto:undisclosed-recipients:>
> *Sent:* Monday, July 26, 2010 4:58 PM
> *Subject:* AeroElectric-List: Another One
>
> Morning, Everyone...
>
> Last item for awhile. I just listed my never used or even
> powered up Trutrak Turn and Bank for sale on eBay. The
> Dynon I now have includes these features, so I won't need it.
>
> This model is now selling for $495. I have no minimum and
> no reserve (well, I guess the minimum is the current bid!
> <G>), so, as before with the EMS, someone is going to get a
> real deal!
>
> For ALL the details and several pictures, just search eBay
> for the item number 350376359107. Or just search using the
> term "Trutrak"...there are a couple of them listed, but
> mine is the low price one!
>
> Harley Dixon
> Long EZ N28EZ
> Canandaigua, NY
>
> *
>
> href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matronics.com/Navigator?AeroElectric-List
> href="http://forums.matronics.com">http://forums.matronics.com
> href="http://www.matronics.com/contribution">http://www.matronics.com/c
> *
>
> *
>
>
> *
>
>
> Checked by AVG - www.avg.com
>
Message 7
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Subject: | Maybe a rewrite? |
Bob,
You were writing Stan Sutterfield about contactors and this was a
quote:
" Battery contactors are continuous duty devices and have significant
temperature rise above ambient."
Cheers, Ferg
Message 8
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Subject: | Re: Electrical System Schematic Review |
At 02:15 AM 7/26/2010, you wrote:
>
>Z-Laury...I like it!
>I need to get up to speed on the 9024 OVM and what it is capable of.
See:
http://www.aeroelectric.com/Catalog/AEC/9024/
>I already have an LR-3 that I was planning to use on the 60a alt.
Hmmmm . . . okay, the LR3 has crowbar ov protection so you'll
need to configure for the panel breaker . . .
>This architecture is so simple that I hate to kluge it up, but I
>want a GPJ so I will insert my GP /SB alt B lead contactor
>schematic and eliminate the SB alt B lead diode.
Would you plan to close two switches to bring
the aux alternator on line? You need one switch
to control the aux alternator field supply. If
You double-up on the ground power contactor
functionality, then selecting the aux alternator
requires an feature that closes that contactor
too. Let me ponder this a bit.
>Why is the 9024 more fuse friendly and why does it obviate the need
>for an alt field CB?
Because it doesn't "crowbar" it "breaks". If you simply
switch off the alternator, then there's no risk to nuisance
tripping a field supply fuse so crew accessible reset
is unnecessary. This is a throwback to ov protection
of yesteryear (the very first product I qualified for
use on a TC aircraft was an OV relay in 1975 or thereabouts).
The crowbar configuration came about as a parts reduction
scheme that was readily adaptable to aircraft that already
used circuit breakers. It got sticky when those slightly
demented OBAM aircraft guys renewed the romance with
fuses.
While the 9024 is designed to drive (ugh!) relays, it's
broad applicability as a contactor power controller, ABMM,
LVWarn and OVProtection, device renewed some interest in
relays . . . this was further enhanced by the availability
of automotive grade relays that are inexpensive while
being also robust.
In a sense, incorporation of microprocessors into
a single, multi-application accessory has re-opened
the books on 'older' technologies that were (and
still are) on the hit list for new designs in some
venues. But my grandpa would remind me that for all
the pneumatic nail and brad drivers I now possess,
sometimes the best way to drive some nails is with
a hammer!
> Are you still seeing all engine essential power coming from the battery bus?
Yes.
>Ironic that this evolution started with my wanting to use Z-13/20
>and you informed me that you had pulled that Z-figure from the AEC book.
Yeah . . . see what can happen when one breaks
a fixation on a bad idea and starts with a clean
slate?
Bob . . .
Message 9
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Subject: | Re: Maybe a rewrite? |
At 03:06 PM 7/26/2010, you wrote:
>Bob,
>
> You were writing Stan Sutterfield about contactors and this
> was a quote:
>
>" Battery contactors are continuous duty devices and have significant
>
> temperature rise above ambient."
Hmmm. . . . thanks for the heads-up. I'm not sure how
I do it but occasionally a thought being typed gets truncated
after the keystrokes are in and I don't catch it. Maybe
too much coffee?
I'll be back in my M.L. office tonight, I'll go get that
post and fix it.
Bob . . .
Message 10
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Subject: | Re: 4 into 1 dsub connector |
At 09:12 AM 7/26/2010, you wrote:
>I'm wiring my RV10 for the Dynon network and am looking for a source
>for a high quality (OBAM) 9 pin Dsub connector that would split into
>4. The Dynon solution is multiple 2 into 1 harnesses, but a 4 into
>1 splitter would be a more elegant solution, if such a device
>exists. The ribbon mount connectors that Bob had on the list isn't
>appropriate for aircraft critical systems, I believe, nor is the
>ribbon of sufficient gauge, but a solid multi connector would be.
>All the normal searches have struck out for me, but maybe someone
>knows a source?
Those are generally fabricated by individuals
who have the application. Suggest you consider
ExpressPCB layouts to mount an array of the
necessary connectors on a single board. See:
http://expresspcb.com/
If you're not inclined to become a board layout
person, I or perhaps someone else on the List
could do the layout for you. A minimum order
from ExpressPCB would get you 6 or more of
the necessary boards for $59.
Emacs!
Be advised that this will only work to gang
like-sexed connectors. When you put rows of
connectors on "combed" traces, pin 1 will
be connected to pin 1 of all other connectors
only if they're the same gender.
The ribbon cable adapter was intended for
test purposes only. I've used a lot of mass-terminated
ribbon cable in test setups but not for
qualified production.
Bob . . .
Message 11
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Subject: | Re: Electrical System Schematic Review |
> Would you plan to close two switches to bring
> the aux alternator on line? You need one switch
> to control the aux alternator field supply. If
> You double-up on the ground power contactor
> functionality, then selecting the aux alternator
> requires an feature that closes that contactor
> too. Let me ponder this a bit.
In the 9th post of this thread, beginning "Bob and Joe..." I attached Z-12 w/SB
Alt contactor. I would wire the two contactors through a DPST as drawn with a
9024 instead of the OVM module
> Are you still seeing all engine essential power coming from the battery bus?
>
> Yes.
I was tapping power from the Ebus and Batt bus to diode bridges to drive my single
EFI ECU, and on another circuit the EFI Injectors. It seems that nothing changes
with engine essentials all on the battery bus. The redundancy of power
sources is just happening upstream of the batt bus and I still use two DPST switches
feeding the diode bridges, w/ ECU and Injector legs on each switch to eliminate
a single point of failure, i.e. the switch.
I'm feeling very comfortable with this scheme.
J
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=306395#306395
Message 12
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Subject: | Stan's concerns for starter contactor locations (revisited) |
Quote:
Bob,
For a starter contactor mounted on the engine firewall, can I
anticipate any problems if the hot air from the oil cooler (180-200
deg F) is directed onto the contactor?
Thanks,
Stan Sutterfield
Stan,
Ferg looked at my previous posting on your query and
thought that I might do a better job . . . got my
tongue tangled around my eyeteeth and couldn't see
what I was typing . . . or some such excuse. Let's
try again
------------------------
No, the starter contactor is not generally used during flight
and it's internal temperatures will be no hotter than the
ambient.
Actual in-flight temperatures may not be as hot as you think.
Just for grins, it would be cool to measure and document the
highest observed temperatures on selected components like the
starter contactor, gascolator, magneto housings, any
electro-whizzies, etc. under the cowl during a fly-off. You
need to record OAT and local ambient under the cowl so that
any single measurement can be correct for other weather
conditions.
I think the results will surprise you.
On the other hand, battery contators are continuous duty devices and
exhibit significant temperature rise above ambient. Since service life
is influenced by temperature, it's always good to minimize exposure
to high ambients. But at the same time, the el-cheapo contactors we've
been using for decades seem to perform well under the cowl.
Once our 9024 series contactor power manager is in stock,
one could use it to greatly reduce the temperature rise
(and energy demands) for keeping the el-cheepo contactor
closed. This functionality emulates the much more expensive
"low power" contactors. Further, when and if contactor replacement
is necessary, you just replace a contactor . . . not the
contactor + smart control electronics.
Bob . . .
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