 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
art(at)zemon.name
Guest
|
 Posted: Tue Mar 27, 2018 5:13 pm Post subject: Voltage Regulator Damage? |
 |
|
Folks,
I am writing my POH, patterning it after the POH for a Vans RV-12. That manual has a warning, "Do not turn off the Master switch with the engine running except in an EMERGENCY situation. Running the engine with the Master Switch off may damage the voltage regulator."
I have a Lycoming motor with B&C voltage regulators, LR3C-14 and SB1B-14.
I have never seen a warning like in the RV-12. Is this something Rotax-specific? Should I have a similar warning in my POH?
Thanks,
-- Art Z.
--
https://CheerfulCurmudgeon.com/"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
 |
BARRY CHECK 6
Joined: 15 Mar 2011
Posts: 738
|
| Posted: Tue Mar 27, 2018 6:08 pm Post subject: Voltage Regulator Damage? |
|
|
Art:
Rotax is RATAX... Forget about IT!
Now, since you are flying a Lycoming the MASTER should be a SPLIT MASTER/ALTERNATOR.
Automatically with a Split Master when you shut off the Master you also shut off the Alternator.
If the Alternator (ALT) is OFF you removed voltage from the Field of the Alternator.
NO DAMAGE will be done to the Alternator or the ACU.
Barry
On Tue, Mar 27, 2018 at 9:13 PM, Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:
| Quote: | Folks,
I am writing my POH, patterning it after the POH for a Vans RV-12. That manual has a warning, "Do not turn off the Master switch with the engine running except in an EMERGENCY situation. Running the engine with the Master Switch off may damage the voltage regulator."
I have a Lycoming motor with B&C voltage regulators, LR3C-14 and SB1B-14.
I have never seen a warning like in the RV-12. Is this something Rotax-specific? Should I have a similar warning in my POH?
Thanks,
-- Art Z.
--
https://CheerfulCurmudgeon.com/"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
art(at)zemon.name
Guest
|
| Posted: Tue Mar 27, 2018 7:39 pm Post subject: Voltage Regulator Damage? |
|
|
Barry,
I appreciate your thoughts but I have three separate switches: Master, Alternator, and Backup Alternator.
For all the detail, here is my wiring diagram: https://drive.google.com/file/d/12DhiCdTSuUNvlsmBK027yQ1mDDy5eRUl/view?usp=sharing
Cheers,
-- Art Z.
On Tue, Mar 27, 2018 at 9:07 PM, FLYaDIVE <flyadive(at)gmail.com (flyadive(at)gmail.com)> wrote:
| Quote: | Art:
Rotax is RATAX... Forget about IT!
Now, since you are flying a Lycoming the MASTER should be a SPLIT MASTER/ALTERNATOR.
Automatically with a Split Master when you shut off the Master you also shut off the Alternator.
If the Alternator (ALT) is OFF you removed voltage from the Field of the Alternator.
NO DAMAGE will be done to the Alternator or the ACU.
Barry
On Tue, Mar 27, 2018 at 9:13 PM, Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:
| Quote: | Folks,
I am writing my POH, patterning it after the POH for a Vans RV-12. That manual has a warning, "Do not turn off the Master switch with the engine running except in an EMERGENCY situation. Running the engine with the Master Switch off may damage the voltage regulator."
I have a Lycoming motor with B&C voltage regulators, LR3C-14 and SB1B-14.
I have never seen a warning like in the RV-12. Is this something Rotax-specific? Should I have a similar warning in my POH?
Thanks,
-- Art Z.
--
https://CheerfulCurmudgeon.com/"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel
|
|
--
https://CheerfulCurmudgeon.com/"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
user9253
Joined: 28 Mar 2008
Posts: 1924
Location: Riley TWP Michigan
|
| Posted: Tue Mar 27, 2018 8:38 pm Post subject: Re: Voltage Regulator Damage? |
|
|
I have an RV-12. A couple of years ago, my PC680 battery failed during flight with an internal broken weld, later found by Bob N. The battery was effectively disconnected from the aircraft electrical system just as if the master switch was shut off. No damage occurred to the voltage regulator or any other component. The symptom during flight was unstable voltage, swinging from too high to too low. You can read about it here:
http://www.matronics.com/forums/viewtopic.php?t=16762906&postdays=0&postorder=asc&start=20&sid=5c9d8b0067c9a54cf7a0a3c0ea1ac72f
I see no reason why an open master contactor during flight would cause damage to the voltage regulator. After all, the regulator turns itself on and off many time per second during normal operation
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
_________________
Joe Gores |
|
| Back to top |
|
|
BARRY CHECK 6
Joined: 15 Mar 2011
Posts: 738
|
| Posted: Wed Mar 28, 2018 4:41 am Post subject: Voltage Regulator Damage? |
|
|
Hello Art:
I tried two methods of printing the schematic but neither worked.
The schematic is larger than the 8.5x11 printer paper.
My eyes are not as good as they use to be and reading off the screen does not give me the ability to hi-lite and make notes.
From many years of other people's the first thing I would change it the ITEM 1 Buss. The constant ON buss will bite you in the ARS (ass). At some point you WILL leave the Dome light ON and drain your battery. The constant ON for the electronic ignition, well, that you do need.
Getting back to the MASTER/ALT SWITCH:
YES! It is wired in correctly .
BUT! The schematic does NOT show it mechanically correct. The dotted line shows the switch as both the Master and Alt being Mechanically connected ALL THE TIME. Meaning: When the Master is On the Alt is On. and you NOT having the ability to turn the Alt OFF with the Master On. I'd bet dollars to donuts you DO have separate control over the Master and Alt.
SO! When you Want to or Have to separate the Alternator from the system you sure can. And... Don't worry about that garbage from ROTAX. Isn't it great having a properly designed system!
Barry
On Tue, Mar 27, 2018 at 11:37 PM, Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:
| Quote: | Barry,
I appreciate your thoughts but I have three separate switches: Master, Alternator, and Backup Alternator.
For all the detail, here is my wiring diagram: https://drive.google.com/file/d/12DhiCdTSuUNvlsmBK027yQ1mDDy5eRUl/view?usp=sharing
Cheers,
-- Art Z.
On Tue, Mar 27, 2018 at 9:07 PM, FLYaDIVE <flyadive(at)gmail.com (flyadive(at)gmail.com)> wrote:
| Quote: | Art:
Rotax is RATAX... Forget about IT!
Now, since you are flying a Lycoming the MASTER should be a SPLIT MASTER/ALTERNATOR.
Automatically with a Split Master when you shut off the Master you also shut off the Alternator.
If the Alternator (ALT) is OFF you removed voltage from the Field of the Alternator.
NO DAMAGE will be done to the Alternator or the ACU.
Barry
On Tue, Mar 27, 2018 at 9:13 PM, Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:
| Quote: | Folks,
I am writing my POH, patterning it after the POH for a Vans RV-12. That manual has a warning, "Do not turn off the Master switch with the engine running except in an EMERGENCY situation. Running the engine with the Master Switch off may damage the voltage regulator."
I have a Lycoming motor with B&C voltage regulators, LR3C-14 and SB1B-14.
I have never seen a warning like in the RV-12. Is this something Rotax-specific? Should I have a similar warning in my POH?
Thanks,
-- Art Z.
--
https://CheerfulCurmudgeon.com/"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel
|
|
--
https://CheerfulCurmudgeon.com/"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
