Today's Message Index:
----------------------
1. 03:16 AM - Re: A brown-out alternative? (zwakie)
2. 04:48 AM - Re: AeroElectric-List mission and decorum (Neal E. George)
3. 07:09 AM - Re: A brown-out alternative? (user9253)
4. 08:22 AM - Re: Re: A brown-out alternative? (Robert L. Nuckolls, III)
5. 10:04 AM - Re: Alternator/shunt question (supik)
6. 11:38 AM - Re: Re: Alternator/shunt question (Art Zemon)
7. 11:43 AM - Re: Re: Alternator/shunt question (Art Zemon)
8. 12:35 PM - Re: Alternator/shunt question (supik)
9. 01:17 PM - Re: Re: Alternator/shunt question (Art Zemon)
10. 01:53 PM - Re: Transponder Antenna (Tundra10)
11. 01:57 PM - Re: Re: Alternator/shunt question (Ernest Christley)
12. 08:53 PM - GPS Antennae ()
Message 1
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| Subject: | Re: A brown-out alternative? |
As promised: I have now tested my little circuit it in-situ on the plane, and I
can confirm that I no longer have brownouts and cannot observe any ill effects.
I do not have the tools to do detailed measurements on the timing aspects, current
back-flow and such, so I cannot report on that part. I do feel pretty confident
that this design will meet my objectives though, time will tell...
--------
Marcel Zwakenberg
Europa XS TG || 912ULS || PH-SBR
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=486681#486681
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| Subject: | AeroElectric-List mission and decorum |
Well said, Bob.
Much more eloquent that warranted...
Neal George
=========
From: On Behalf Of Robert L. Nuckolls, III
Barry,
You are not being attacked. You have
offered many 'knowledge nuggets' in
both practice and physics that were simply
wrong. I and others have simply argued to
correct such offers. You have accused
me of being on drugs, indulging in
'three stooges logic' and then suggested
you might have to sink my 'rubber duck'
although the significance of that statement
eludes me.
No one is allowed to insult me. It's
an easy choice one makes. Either an assertion
is true and demands further reflection
or it's false and deserves no further
notice. Taking umbrage is a waste of time
and emotional capital.
This is not a public forum . . . it's a
classroom where answers for failure are
sought and the outcomes of repeatable
experiments are shared. Contributors
to those goals are welcome.
Bob . . .
Message 3
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| Subject: | Re: A brown-out alternative? |
Good work Marcel.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=486685#486685
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| Subject: | Re: A brown-out alternative? |
At 05:15 AM 1/3/2019, you wrote:
>
>As promised: I have now tested my little circuit it in-situ on the
>plane, and I can confirm that I no longer have brownouts and cannot
>observe any ill effects.
>
>I do not have the tools to do detailed measurements on the timing
>aspects, current back-flow and such, so I cannot report on that
>part. I do feel pretty confident that this design will meet my
>objectives though, time will tell...
>
>--------
>Marcel Zwakenberg
>Europa XS TG || 912ULS || PH-SBR
>
Thank you for advancing this idea and
sharing your findings!
Bob . . .
Message 5
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| Subject: | Re: Alternator/shunt question |
Bob,
I would like to go with a similar setup: 60A B&C Main Alt + 30A B&C Aux Alt. Single
battery. Both alternators will be ON during normal ops. Shall the Main Alt
fail, I plan to shed loads and if possible continue home VFR Day with stopovers
if needed.
For this setup I need the Aux Alternator to be able to charge at min 14.1V to recharge
the battery -correct?
1. What would be the best regulator setup for both alternators? Two main linear
regulators or one main and one standby?
2. How do I recognize the Aux Alt has failed if the loads did not exceed 60A or
the voltage didn't drop to 14.1V? Can this be checked only by switching of the
Main Alt?
thanks! Happy New Year!
Igor
--------
Igor
RV10 in progress
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=486688#486688
Message 6
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| Subject: | Re: Alternator/shunt question |
Igor,
That is exactly the system that I built for my BD-4C. I used B&C's voltage
regulators. The backup regulator is set at a lower voltage than the primary
so the field on the backup alternator doesn't get energized unless the
primary fails (which makes the voltage drop).
After engine start, I turn on the switches for both alternators.
Your bus voltage is your primary diagnostic:
- Voltage drops below the set point for the primary voltage regulator
means that the primary alternator is not producing power
- Voltage drops below the set point for the backup voltage regulator
means that neither alternator is producing power
This does not identify the cause, only the symptom. It could be a tripped
field circuit breaker. It could be a failed component. Maybe you simply
forgot to turn on the alternator switch.
In addition to the voltage display on my EFIS, I added a current sensor to
the output of each of the two alternators and I display both of those
values. No particular reason; I just think it's cool to see the data.
If you want to see my wiring diagram, which is specific for the B&C
alternators and voltage regulators, take a look at engine.pdf
<https://drive.google.com/file/d/12DhiCdTSuUNvlsmBK027yQ1mDDy5eRUl/view?usp=sharing>.
The whole set of diagrams (maybe useful to you?) is in N2468Z Wiring
Diagrams
<https://drive.google.com/drive/folders/0BzOP2gb9_3RQUHpIMjNfa0NnQW8?usp=sharing>
*g*on Google Drive.
Cheers,
-- Art Z.
On Thu, Jan 3, 2019 at 12:39 PM supik <bionicad@hotmail.com> wrote:
>
> Bob,
>
> I would like to go with a similar setup: 60A B&C Main Alt + 30A B&C Aux
> Alt. Single battery. Both alternators will be ON during normal ops. Shall
> the Main Alt fail, I plan to shed loads and if possible continue home VFR
> Day with stopovers if needed.
>
> For this setup I need the Aux Alternator to be able to charge at min 14.1V
> to recharge the battery -correct?
>
> 1. What would be the best regulator setup for both alternators? Two main
> linear regulators or one main and one standby?
>
> 2. How do I recognize the Aux Alt has failed if the loads did not exceed
> 60A or the voltage didn't drop to 14.1V? Can this be checked only by
> switching of the Main Alt?
--
https://CheerfulCurmudgeon.com/
*"Be kind, for everyone you meet is fighting a hard battle."*
Message 7
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| Subject: | Re: Alternator/shunt question |
Igor,
That is exactly the system that I built for my BD-4C. I used B&C's voltage
regulators. The backup regulator is set at a lower voltage than the primary
so the field on the backup alternator doesn't get energized unless the
primary fails (which makes the voltage drop).
After engine start, I turn on the switches for both alternators.
Your bus voltage is your primary diagnostic:
- Voltage drops below the set point for the primary voltage regulator
means that the primary alternator is not producing power
- Voltage drops below the set point for the backup voltage regulator
means that neither alternator is producing power
This does not identify the cause, only the symptom. It could be a tripped
field circuit breaker. It could be a failed component. Maybe you simply
forgot to turn on the alternator switch.
In addition to the voltage display on my EFIS, I added a current sensor to
the output of each of the two alternators and I display both of those
values. No particular reason; I just think it's cool to see the data.
If you want to see my wiring diagram, which is specific for the B&C
alternators and voltage regulators, take a look at engine.pdf
<https://drive.google.com/file/d/12DhiCdTSuUNvlsmBK027yQ1mDDy5eRUl/view?usp=sharing>.
The whole set of diagrams (maybe useful to you?) is in N2468Z Wiring
Diagrams
<https://drive.google.com/drive/folders/0BzOP2gb9_3RQUHpIMjNfa0NnQW8?usp=sharing>
*g*on Google Drive.
Cheers,
-- Art Z.
On Thu, Jan 3, 2019 at 12:39 PM supik <bionicad@hotmail.com> wrote:
>
> Bob,
>
> I would like to go with a similar setup: 60A B&C Main Alt + 30A B&C Aux
> Alt. Single battery. Both alternators will be ON during normal ops. Shall
> the Main Alt fail, I plan to shed loads and if possible continue home VFR
> Day with stopovers if needed.
>
> For this setup I need the Aux Alternator to be able to charge at min 14.1V
> to recharge the battery -correct?
>
> 1. What would be the best regulator setup for both alternators? Two main
> linear regulators or one main and one standby?
>
> 2. How do I recognize the Aux Alt has failed if the loads did not exceed
> 60A or the voltage didn't drop to 14.1V? Can this be checked only by
> switching of the Main Alt?
--
https://CheerfulCurmudgeon.com/
*"Be kind, for everyone you meet is fighting a hard battle."*
Message 8
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| Subject: | Re: Alternator/shunt question |
Thanks a lot Art!
I'll check your diagrams..
--------
Igor
RV10 in progress
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=486693#486693
Message 9
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| Subject: | Re: Alternator/shunt question |
Jim,
You're welcome. I drew those diagrams in LibreOffice and the source files
are available, too, if you want them.
Finally, please be aware that there are differences between those diagrams
and the airplane. I have the "field mods" on paper but have not updated the
diagrams, yet.
Cheers,
-- Art Z.
On Thu, Jan 3, 2019 at 3:10 PM <jim@poogiebearranch.com> wrote:
> Thanks for publishing your entire set of schematics. Very nice job. Your
> system is very similar to what I intend to build, and it's good to have an
> "example" for the documentation I want to produce for mine.
>
> Jim Parker
>
>
> -------- Original Message --------
> Subject: Re: AeroElectric-List: Re: Alternator/shunt question
> From: Art Zemon <art@zemon.name>
> Date: Thu, January 03, 2019 1:02 pm
> To: aeroelectric-list@matronics.com
>
> Igor,
>
> That is exactly the system that I built for my BD-4C. I used B&C's voltage
> regulators. The backup regulator is set at a lower voltage than the primary
> so the field on the backup alternator doesn't get energized unless the
> primary fails (which makes the voltage drop).
>
> After engine start, I turn on the switches for both alternators.
>
> Your bus voltage is your primary diagnostic:
>
> - Voltage drops below the set point for the primary voltage regulator
> means that the primary alternator is not producing power
> - Voltage drops below the set point for the backup voltage regulator
> means that neither alternator is producing power
>
> This does not identify the cause, only the symptom. It could be a tripped
> field circuit breaker. It could be a failed component. Maybe you simply
> forgot to turn on the alternator switch.
>
> In addition to the voltage display on my EFIS, I added a current sensor to
> the output of each of the two alternators and I display both of those
> values. No particular reason; I just think it's cool to see the data.
>
> If you want to see my wiring diagram, which is specific for the B&C
> alternators and voltage regulators, take a look at engine.pdf
> <https://drive.google.com/file/d/12DhiCdTSuUNvlsmBK027yQ1mDDy5eRUl/view?usp=sharing>.
> The whole set of diagrams (maybe useful to you?) is in N2468Z Wiring
> Diagrams
> <https://drive.google.com/drive/folders/0BzOP2gb9_3RQUHpIMjNfa0NnQW8?usp=sharing>
> *g*on Google Drive.
>
> Cheers,
> -- Art Z.
>
> On Thu, Jan 3, 2019 at 12:39 PM supik <bionicad@hotmail.com> wrote:
>
>>
>> Bob,
>>
>> I would like to go with a similar setup: 60A B&C Main Alt + 30A B&C Aux
>> Alt. Single battery. Both alternators will be ON during normal ops. Shall
>> the Main Alt fail, I plan to shed loads and if possible continue home VFR
>> Day with stopovers if needed.
>>
>> For this setup I need the Aux Alternator to be able to charge at min
>> 14.1V to recharge the battery -correct?
>>
>> 1. What would be the best regulator setup for both alternators? Two main
>> linear regulators or one main and one standby?
>>
>> 2. How do I recognize the Aux Alt has failed if the loads did not exceed
>> 60A or the voltage didn't drop to 14.1V? Can this be checked only by
>> switching of the Main Alt?
>
>
> --
> https://CheerfulCurmudgeon.com/
>
> *"Be kind, for everyone you meet is fighting a hard battle."*
>
>
--
https://CheerfulCurmudgeon.com/
*"Be kind, for everyone you meet is fighting a hard battle."*
Message 10
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| Subject: | Re: Transponder Antenna |
One thing I find odd about the blade transponder antenna, is that the entire body
is a chunk of aluminum. There is a horizontal band with a plastic? covering.
So it seems the radiating element is pretty shielded inside.
It is a Dorne & Margolin DM NI 70-2 if anyone is familiar with it.
Photo attached.
Jeff Page
Dream Aircraft Tundra #10
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=486694#486694
Attachments:
http://forums.matronics.com//files/antenna_903.jpg
Message 11
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| Subject: | Re: Alternator/shunt question |
How did you manage that with LibreOffice, Art?=C2- I've never been able
to get anything other than the most rudimentary drawings out of it.=C2- I
'd appreciate you sharing your source files.=C2- I would definitely use i
t to improve my POH.
On Thursday, January 3, 2019, 4:18:00 PM EST, Art Zemon <art@zemon.name
> wrote:
Jim,
You're welcome. I drew those diagrams in LibreOffice and the source files a
re available, too, if you want them.
Finally, please be aware that there are differences between those diagrams
and the airplane. I have the "field mods" on paper but have not updated the
diagrams, yet.
Cheers,=C2- =C2- -- Art Z.
On Thu, Jan 3, 2019 at 3:10 PM <jim@poogiebearranch.com> wrote:
Thanks for publishing your entire set of schematics.=C2- Very nice job.
=C2- Your system is very similar to what I intend to build, and it's good
to have an "example" for the documentation I want to produce for mine.=C2
-=C2-
Jim Parker
-------- Original Message --------
Subject: Re: AeroElectric-List: Re: Alternator/shunt question
From: Art Zemon <art@zemon.name>
Igor,
That is exactly the system that I built for my BD-4C. I used B&C's voltage
regulators. The backup regulator is set at a lower voltage than the primary
so the field on the backup alternator doesn't get energized unless the pri
mary fails (which makes the voltage drop).
After engine start, I turn on the switches for both alternators.
Your bus voltage is your primary diagnostic:
- Voltage drops below the set point for the primary voltage regulator me
ans that the primary alternator is not producing power
- Voltage drops below the set point for the backup voltage regulator mea
ns that neither alternator is producing power
This does not identify the cause, only the symptom. It could be a tripped f
ield circuit breaker. It could be a failed component. Maybe you simply forg
ot to turn on the alternator switch.
In addition to the voltage display on my EFIS, I added a current sensor to
the output of each of the two alternators and I display both of those value
s. No particular reason; I just think it's cool to see the data.
If you want to see my wiring diagram, which is specific for the B&C alterna
tors and voltage regulators, take a look at engine.pdf. The whole set of di
agrams (maybe useful to you?) is in N2468Z Wiring Diagrams=C2-gon Google
Drive.
Cheers,=C2- =C2- -- Art Z.
On Thu, Jan 3, 2019 at 12:39 PM supik <bionicad@hotmail.com> wrote:
Bob,
I would like to go with a similar setup: 60A B&C Main Alt + 30A B&C Aux Al
t. Single battery. Both alternators will be ON during normal ops. Shall the
Main Alt fail, I plan to shed loads and if possible continue home VFR Day
with stopovers if needed.
For this setup I need the Aux Alternator to be able to charge at min 14.1V
to recharge the battery -correct?
1. What would be the best regulator setup for both alternators? Two main l
inear regulators or one main and one standby?
2. How do I recognize the Aux Alt has failed if the loads did not exceed 6
0A or the voltage didn't drop to 14.1V? Can this be checked only by switchi
ng of the Main Alt?
--
https://CheerfulCurmudgeon.com/
"Be kind, for everyone you meet is fighting a hard battle."
--
https://CheerfulCurmudgeon.com/
"Be kind, for everyone you meet is fighting a hard battle."
Message 12
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Do GPS antennae have an electronic front and rear?When physically attaching an
antenna to an airplane there is a designed direction for strength and best aerodynamic
airflow.But, if I mount a GPS antenna inside the airplane on a glare
shield, does the orientation matter?
Stan Sutterfield
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