Date   

Re: Alt Field Circuit Breaker Popping

Jim Patillo
 

Btw it also tripped the 5a alt. field breaker on the panel and turned on the amber low volt alarm each time. That’s what started my electrical quest.

Jim
N46JP-0200


Re: Alt Field Circuit Breaker Popping

Jim Patillo
 

Excellent rendition Rick,

This a great learning moment for Chris to bond and understanding his new ride. Very handy stuff.
He has a fast airplane with the 0200 and GU canard.

The problem I had was the 60 amp breaker I installed for the alternator was mounted on the engine side of the firewall and after a few years of heat soaking, the breaker would degrade and trip. After it cooled down I could reset it. Replaced it twice in 19 years.

Jim Patillo
N46JP-Q200
😎


Re: Alt Field Circuit Breaker Popping

Corbin
 

Thank you!  I can’t wait to try these steps!  I had to travel out of town for a couple of days.  So I won’t be able to try until Saturday.

Thanks again!

Corbin

On Jul 31, 2019, at 7:26 AM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

That’s not quite correct. The 50a breaker connects the output of the alternator to the bus always unless it is tripped or pulled. Even with engine not running and regardless of the field/regulator being powered. Without voltage at the alternator field the alternator will not produce any current. The bus voltage at alternator output will not result in the alternator drawing any current from the bus because the internal diodes in the alternator block current from going “into” the alternator output. 

A failed alternator with shorted diode(s) (there are typically 6) will cause the 50 amp breaker to trip as soon as the master switch is on. 
The 50mp amp breaker is there for 2 reasons. One, to protect the alternator from producing too much power. Two, to protect the battery should the alternator diode(s) fail. 

Sonia and Rick Hole
Email: r.hole@...

On Jul 31, 2019, at 1:52 AM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

You are correct.  However, it only activates once the alternator has power and is running.  And since the 5 amp is popping right away then the alternator never gets the chance to excite the stator.  So I’m not sure if it would pop or not as I can’t get that far.


Corbin

On Jul 30, 2019, at 5:54 PM, logistics_engineering@... [Q-LIST] <Q-LIST@...> wrote:

 

Your plane only has one large 50 amp breaker on the panel under the amateur built sign according to Mark. If that’s not tripping it’s probably wiring or the regulator.

Some of us had split the system and installed another 60 a breaker for the alternator on the firewall.

Regards,
Jim
N46JP - Q200


Re: Alt Field Circuit Breaker Popping

Rick Hole
 

That’s not quite correct. The 50a breaker connects the output of the alternator to the bus always unless it is tripped or pulled. Even with engine not running and regardless of the field/regulator being powered. Without voltage at the alternator field the alternator will not produce any current. The bus voltage at alternator output will not result in the alternator drawing any current from the bus because the internal diodes in the alternator block current from going “into” the alternator output. 
A failed alternator with shorted diode(s) (there are typically 6) will cause the 50 amp breaker to trip as soon as the master switch is on. 
The 50mp amp breaker is there for 2 reasons. One, to protect the alternator from producing too much power. Two, to protect the battery should the alternator diode(s) fail. 

Sonia and Rick Hole
Email: r.hole@...

On Jul 31, 2019, at 1:52 AM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

You are correct.  However, it only activates once the alternator has power and is running.  And since the 5 amp is popping right away then the alternator never gets the chance to excite the stator.  So I’m not sure if it would pop or not as I can’t get that far.


Corbin

On Jul 30, 2019, at 5:54 PM, logistics_engineering@... [Q-LIST] <Q-LIST@...> wrote:

 

Your plane only has one large 50 amp breaker on the panel under the amateur built sign according to Mark. If that’s not tripping it’s probably wiring or the regulator.

Some of us had split the system and installed another 60 a breaker for the alternator on the firewall.

Regards,
Jim
N46JP - Q200


Re: Alt Field Circuit Breaker Popping

Rick Hole
 

Ok Corbin you are working so hard on this. You might try this test:
At the regulator disconnect the power wire from the 5a breaker. Power up. Does the breaker still trip? If yes the wire from breaker to regulator is bad. If no, reconnect the wire and at the regulator disconnect the wire going to alternator field. Power up again. Breaker trips? Bad regulator. Does not trip? Reconnect the wire. Disconnect field wire at alternator. Power up again. Trip? Bad wire. No trip? Bad alternator. 


Sonia and Rick Hole
Email: r.hole@...

On Jul 31, 2019, at 1:52 AM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

You are correct.  However, it only activates once the alternator has power and is running.  And since the 5 amp is popping right away then the alternator never gets the chance to excite the stator.  So I’m not sure if it would pop or not as I can’t get that far.


Corbin

On Jul 30, 2019, at 5:54 PM, logistics_engineering@... [Q-LIST] <Q-LIST@...> wrote:

 

Your plane only has one large 50 amp breaker on the panel under the amateur built sign according to Mark. If that’s not tripping it’s probably wiring or the regulator.

Some of us had split the system and installed another 60 a breaker for the alternator on the firewall.

Regards,
Jim
N46JP - Q200


Re: Alt Field Circuit Breaker Popping

Rick Hole
 

Don’t forget, with main switch off, to check resistance from field wire to ground. It should not be 0 ohms. 
It may not show infinite however as other devices on the unpowered bus may have resistance to ground. For example any radio or device which comes on when the main sw is activated. A couple hundred ohms would be common. 
An ok Continuity check of a wire end to end does not preclude the wire also being grounded

Sonia and Rick Hole
Email: r.hole@...

On Jul 30, 2019, at 7:37 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

I’m starting to think I need a new alternator.  Wiring seems fine to me.  Continuity checks are good.

Corbin

On Jul 30, 2019, at 5:21 PM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

I have seen frayed wires cause similar problems

Sonia and Rick Hole
Email: r.hole@...

On Jul 30, 2019, at 1:30 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

Just an update on the alternator field issue.  I replaced the 5 amp breaker but that didn't fix it.  My buddy that has a PP voltage regulator had the 28 volt version and not the 14 volt.

I am going to pull the engine off again this afternoon and run a wire from the Field term, on back of Alternator, to the back of the 5 amp breaker.  If it doesn't pop then I guess the problem is between breaker, voltage regulator, and firewall.


Corbin Ge!ser

On July 29, 2019 at 7:41 PM, "Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Thanks!  I plan on doing this tomorrow.  I found a buddy that has a new PP voltage regulator and some 5 amp breakers.


I’ll replace the breaker and if that doesn’t stop it from popping then I’ll swap the voltage regulator.

Corbin

On Jul 29, 2019, at 4:46 PM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

I often take it on the master solenoid or on the panel cig lighter... If those are inconvenient try the battery + post as long as the master switch is on

Sonia and Rick Hole
Email: r.hole@...

On Jul 29, 2019, at 2:34 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 


This sounds easy to test.....where on bus should I test voltage from?  I am not familiar with working with the bus.  Do I just place the probe anywhere on a good contact along bus?

Corbin Ge!ser

On July 29, 2019 at 2:50 PM, "'Rick Hole' r.hole@... [Q-LIST]" <Q-LIST@...> wrote:

 


The easiest test for a functioning alternator is to read the voltage on the 12V bus.  The battery without alternator will be 12.6 volts or less.  A functioning alternator will show more than 12.6 volts.  Normally the voltage regulator will adjust the field current to produce 13.8v with an automotive regulator and possibly as high as 14.4v with an aircraft regulator.

 

The engine must be running for the alternator to produce power, and may not produce full power at less than about 1600 RPMs.

 

Rick Hole

 

From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Monday, July 29, 2019 12:44 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping

 

 

50 amp breaker is handling the current out from the alternator. It is only active when the alternator is spinning otherwise current from the alternator is zero. Battery charge plus electric items is probably 35 amps right after takeoff. If engine is not turning or field voltage is zero, then all current is coming from the battery.

 

Cheers,

Jay

 

Sent from my Verizon Wireless 4G LTE DROID



"Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Update:  I’ve located a 50amp breaker labeled MAIN.  I turned on Master, electronics come on, and then I pulled the 50amp breaker.  Nothing turned off.  I’ve removed the breaker and would like to know how to test to confirm if it’s working or not.  

 

Should all electronics turn off if I pulled the MAIN breaker?

Corbin


On Jul 29, 2019, at 11:59 AM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

An open alternator output, for example 50a breaker tripped or disconnected wire could cause the field breaker to blow only if the regulator suppling full voltage to the field draws enough current to trip the 5a field breaker. This should not be possible but if the 5a breaker is old and tired and, say, tripping at 3a your could see it trip. I have never seen this happen though. 

Don’t overlook wire fault as a cause, insulation worn through and he wire touching something grounded etc. 

Rick Hole

Email: r.hole@...


On Jul 29, 2019, at 10:23 AM, q2pilot@... [Q-LIST] <Q-LIST@...> wrote:

 

Ok, great news.

 

Now disconnect the Field wire from the back of the alternator and leave hanging.

Does the 5A break still blow?  If it does it's a bad regulator.  If it doesn't blow now, then we may have a shorted field in the alternator.

 

: )

Mike

 









Re: OSH warbird webcam captures quickies

 

Never thought of it that way....or to small to see

On Tue, Jul 30, 2019 at 2:27 PM Jerry Marstall jnmarstall@... [Q-LIST] <Q-LIST@...> wrote:
 

The reason you got two passes is because you went by too fast to see on the first one. 


-------- Original message --------
From: "Keith Welsh kflyav8@... [Q-LIST]" <Q-LIST@...>
Date: 7/30/19 2:14 PM (GMT-05:00)
Subject: Re: [Q-LIST] OSH warbird webcam captures quickies

 

Thanks Jim,
I was surprised and honored for the same reasons you just stated.  Don’t know if or how many of you saw it fly in Thursday’s airshow.  After all the brain pounding & butterflies the actual flight was a blast....because our flight leader had done such a good coaching us.  

If anyone noticed we launched top down w/ the fastest planes circling @ 1100’, the second tire circled @ 800’ with the slowest @ 500’, me and the Viggen.  The air boss brought us down from the bottom up.  The crowd passes were @ 200’.  When the Viggen & I landed everyone stepped down till all had done a crowd pass & landed.  The Air Boss had me make a tight pattern to get two passes in.  That was unexpected & told to me right after I broke ground on takeoff.  Much planning, the right combination of people & discipline was necessary to pull this off as cleanly as we did.  We were told in no uncertain terms 4 things to remember....be where your supposed to be, do what your supposed to do, be on time & never loose sight of the plane if front.  The 200’ crowd pass granted by the Air Boss was unusual I’m told for civilian flyers, normally it’s 500’.  

On Tue, Jul 30, 2019 at 10:53 AM JMasal@... [Q-LIST] <Q-LIST@...> wrote:
 

OUTSTANDING kEITH. Especially in view of the weeping, wailing and gnashing of teeth it took you to get there! Also proud that the Osh
judges could recognize the workmanship of an older homebuilt. I was at Osh but didn't see it as my stamina is still crap and I
stuck to the trams. Did see the QAC Quickie from a distance but I thought that one was hanging in a Wash state museum. Was it
moved?

j.


-----Original Message-----
From: Keith Welsh kflyav8@... [Q-LIST] <Q-LIST@...>
To: Q-LIST <Q-LIST@...>
Sent: Mon, Jul 29, 2019 6:53 pm
Subject: Re: [Q-LIST] OSH warbird webcam captures quickies

 
The Quickie received recognition for “Outstanding Workmanship Plans built”
When I registered it upon arriving I almost declined judging.  
I knew thirty years of troubleshooting getting engine temps in line resulting in five overhauls and two engines, three cowl repaints, a few delaminate repairs from being kneed at airshows, two panels and fading of the cockpit material would keep it from being a top tier airplane. 
I started getting curious the more initials that were on the prop card, 15 in all, especially when one judge told me that was a good thing.
 I was surprised when a letter was delivered by the head judge on Friday that the Q would be recognized at Sat evenings awards presentation.  Even though it didn’t get a Lindy the plaque received is pretty especially when considering there were some 4000 homebuilts registered.
The winner in plans built was.......a Long Eze. 


On Mon, Jul 29, 2019 at 4:23 PM JMasal@... [Q-LIST] <Q-LIST@...> wrote:
 
Did I black out suddenly??? I'm reading a lot of Keith congrats but exactly WHAT award did he win?

j



Jay


Re: Alt Field Circuit Breaker Popping

Corbin
 

You are correct.  However, it only activates once the alternator has power and is running.  And since the 5 amp is popping right away then the alternator never gets the chance to excite the stator.  So I’m not sure if it would pop or not as I can’t get that far.

Corbin

On Jul 30, 2019, at 5:54 PM, logistics_engineering@... [Q-LIST] <Q-LIST@...> wrote:

 

Your plane only has one large 50 amp breaker on the panel under the amateur built sign according to Mark. If that’s not tripping it’s probably wiring or the regulator.

Some of us had split the system and installed another 60 a breaker for the alternator on the firewall.

Regards,
Jim
N46JP - Q200


Re: Alt Field Circuit Breaker Popping

Corbin
 

Great point!  Thanks for keeping me positive.   I love the fact I’m now comfortable taking off the engine and putting back on.  I’ve learned so much this last week.  

Corbin

On Jul 30, 2019, at 6:28 PM, 'Jay Scheevel SGT' jay@... [Q-LIST] <Q-LIST@...> wrote:

 

Don’t get too frustrated, Corbin. This is giving you a chance to really get to “know” your plane. Better in the long run.

 

Cheers,

Jay

 

From: Q-LIST@... <Q-LIST@...>
Sent: Tuesday, July 30, 2019 1:31 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping

 

 

Just an update on the alternator field issue.  I replaced the 5 amp breaker but that didn't fix it.  My buddy that has a PP voltage regulator had the 28 volt version and not the 14 volt.

 

I am going to pull the engine off again this afternoon and run a wire from the Field term, on back of Alternator, to the back of the 5 amp breaker.  If it doesn't pop then I guess the problem is between breaker, voltage regulator, and firewall.

 

 

Corbin Ge!ser


On July 29, 2019 at 7:41 PM, "Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Thanks!  I plan on doing this tomorrow.  I found a buddy that has a new PP voltage regulator and some 5 amp breakers.

 

I’ll replace the breaker and if that doesn’t stop it from popping then I’ll swap the voltage regulator.

Corbin


On Jul 29, 2019, at 4:46 PM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

I often take it on the master solenoid or on the panel cig lighter... If those are inconvenient try the battery + post as long as the master switch is on

Sonia and Rick Hole

Email: r.hole@...


On Jul 29, 2019, at 2:34 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

 

This sounds easy to test.....where on bus should I test voltage from?  I am not familiar with working with the bus.  Do I just place the probe anywhere on a good contact along bus?

 

Corbin Ge!ser


On July 29, 2019 at 2:50 PM, "'Rick Hole' r.hole@... [Q-LIST]" <Q-LIST@...> wrote:

 

 

The easiest test for a functioning alternator is to read the voltage on the 12V bus.  The battery without alternator will be 12.6 volts or less.  A functioning alternator will show more than 12.6 volts.  Normally the voltage regulator will adjust the field current to produce 13.8v with an automotive regulator and possibly as high as 14.4v with an aircraft regulator.

 

The engine must be running for the alternator to produce power, and may not produce full power at less than about 1600 RPMs.

 

Rick Hole

 

From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Monday, July 29, 2019 12:44 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping

 

 

50 amp breaker is handling the current out from the alternator. It is only active when the alternator is spinning otherwise current from the alternator is zero. Battery charge plus electric items is probably 35 amps right after takeoff. If engine is not turning or field voltage is zero, then all current is coming from the battery.

 

Cheers,

Jay

 

Sent from my Verizon Wireless 4G LTE DROID



"Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Update:  I’ve located a 50amp breaker labeled MAIN.  I turned on Master, electronics come on, and then I pulled the 50amp breaker.  Nothing turned off.  I’ve removed the breaker and would like to know how to test to confirm if it’s working or not.  

 

Should all electronics turn off if I pulled the MAIN breaker?

Corbin


On Jul 29, 2019, at 11:59 AM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

An open alternator output, for example 50a breaker tripped or disconnected wire could cause the field breaker to blow only if the regulator suppling full voltage to the field draws enough current to trip the 5a field breaker. This should not be possible but if the 5a breaker is old and tired and, say, tripping at 3a your could see it trip. I have never seen this happen though. 

Don’t overlook wire fault as a cause, insulation worn through and he wire touching something grounded etc. 

Rick Hole

Email: r.hole@...


On Jul 29, 2019, at 10:23 AM, q2pilot@... [Q-LIST] <Q-LIST@...> wrote:

 

Ok, great news.

 

Now disconnect the Field wire from the back of the alternator and leave hanging.

Does the 5A break still blow?  If it does it's a bad regulator.  If it doesn't blow now, then we may have a shorted field in the alternator.

 

: )

Mike

 

 

 

 

 

 

 

 


Re: Alt Field Circuit Breaker Popping

Corbin
 

I’m starting to think I need a new alternator.  Wiring seems fine to me.  Continuity checks are good.

Corbin

On Jul 30, 2019, at 5:21 PM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

I have seen frayed wires cause similar problems

Sonia and Rick Hole
Email: r.hole@...

On Jul 30, 2019, at 1:30 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

Just an update on the alternator field issue.  I replaced the 5 amp breaker but that didn't fix it.  My buddy that has a PP voltage regulator had the 28 volt version and not the 14 volt.

I am going to pull the engine off again this afternoon and run a wire from the Field term, on back of Alternator, to the back of the 5 amp breaker.  If it doesn't pop then I guess the problem is between breaker, voltage regulator, and firewall.


Corbin Ge!ser

On July 29, 2019 at 7:41 PM, "Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Thanks!  I plan on doing this tomorrow.  I found a buddy that has a new PP voltage regulator and some 5 amp breakers.


I’ll replace the breaker and if that doesn’t stop it from popping then I’ll swap the voltage regulator.

Corbin

On Jul 29, 2019, at 4:46 PM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

I often take it on the master solenoid or on the panel cig lighter... If those are inconvenient try the battery + post as long as the master switch is on

Sonia and Rick Hole
Email: r.hole@...

On Jul 29, 2019, at 2:34 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 


This sounds easy to test.....where on bus should I test voltage from?  I am not familiar with working with the bus.  Do I just place the probe anywhere on a good contact along bus?

Corbin Ge!ser

On July 29, 2019 at 2:50 PM, "'Rick Hole' r.hole@... [Q-LIST]" <Q-LIST@...> wrote:

 


The easiest test for a functioning alternator is to read the voltage on the 12V bus.  The battery without alternator will be 12.6 volts or less.  A functioning alternator will show more than 12.6 volts.  Normally the voltage regulator will adjust the field current to produce 13.8v with an automotive regulator and possibly as high as 14.4v with an aircraft regulator.

 

The engine must be running for the alternator to produce power, and may not produce full power at less than about 1600 RPMs.

 

Rick Hole

 

From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Monday, July 29, 2019 12:44 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping

 

 

50 amp breaker is handling the current out from the alternator. It is only active when the alternator is spinning otherwise current from the alternator is zero. Battery charge plus electric items is probably 35 amps right after takeoff. If engine is not turning or field voltage is zero, then all current is coming from the battery.

 

Cheers,

Jay

 

Sent from my Verizon Wireless 4G LTE DROID



"Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Update:  I’ve located a 50amp breaker labeled MAIN.  I turned on Master, electronics come on, and then I pulled the 50amp breaker.  Nothing turned off.  I’ve removed the breaker and would like to know how to test to confirm if it’s working or not.  

 

Should all electronics turn off if I pulled the MAIN breaker?

Corbin


On Jul 29, 2019, at 11:59 AM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

An open alternator output, for example 50a breaker tripped or disconnected wire could cause the field breaker to blow only if the regulator suppling full voltage to the field draws enough current to trip the 5a field breaker. This should not be possible but if the 5a breaker is old and tired and, say, tripping at 3a your could see it trip. I have never seen this happen though. 

Don’t overlook wire fault as a cause, insulation worn through and he wire touching something grounded etc. 

Rick Hole

Email: r.hole@...


On Jul 29, 2019, at 10:23 AM, q2pilot@... [Q-LIST] <Q-LIST@...> wrote:

 

Ok, great news.

 

Now disconnect the Field wire from the back of the alternator and leave hanging.

Does the 5A break still blow?  If it does it's a bad regulator.  If it doesn't blow now, then we may have a shorted field in the alternator.

 

: )

Mike

 









Re: Alt Field Circuit Breaker Popping

Jay Scheevel
 

Don’t get too frustrated, Corbin. This is giving you a chance to really get to “know” your plane. Better in the long run.

 

Cheers,

Jay

 

From: Q-LIST@... <Q-LIST@...>
Sent: Tuesday, July 30, 2019 1:31 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping

 

 

Just an update on the alternator field issue.  I replaced the 5 amp breaker but that didn't fix it.  My buddy that has a PP voltage regulator had the 28 volt version and not the 14 volt.

 

I am going to pull the engine off again this afternoon and run a wire from the Field term, on back of Alternator, to the back of the 5 amp breaker.  If it doesn't pop then I guess the problem is between breaker, voltage regulator, and firewall.

 

 

Corbin Ge!ser


On July 29, 2019 at 7:41 PM, "Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Thanks!  I plan on doing this tomorrow.  I found a buddy that has a new PP voltage regulator and some 5 amp breakers.

 

I’ll replace the breaker and if that doesn’t stop it from popping then I’ll swap the voltage regulator.

Corbin


On Jul 29, 2019, at 4:46 PM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

I often take it on the master solenoid or on the panel cig lighter... If those are inconvenient try the battery + post as long as the master switch is on

Sonia and Rick Hole

Email: r.hole@...


On Jul 29, 2019, at 2:34 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

 

This sounds easy to test.....where on bus should I test voltage from?  I am not familiar with working with the bus.  Do I just place the probe anywhere on a good contact along bus?

 

Corbin Ge!ser


On July 29, 2019 at 2:50 PM, "'Rick Hole' r.hole@... [Q-LIST]" <Q-LIST@...> wrote:

 

 

The easiest test for a functioning alternator is to read the voltage on the 12V bus.  The battery without alternator will be 12.6 volts or less.  A functioning alternator will show more than 12.6 volts.  Normally the voltage regulator will adjust the field current to produce 13.8v with an automotive regulator and possibly as high as 14.4v with an aircraft regulator.

 

The engine must be running for the alternator to produce power, and may not produce full power at less than about 1600 RPMs.

 

Rick Hole

 

From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Monday, July 29, 2019 12:44 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping

 

 

50 amp breaker is handling the current out from the alternator. It is only active when the alternator is spinning otherwise current from the alternator is zero. Battery charge plus electric items is probably 35 amps right after takeoff. If engine is not turning or field voltage is zero, then all current is coming from the battery.

 

Cheers,

Jay

 

Sent from my Verizon Wireless 4G LTE DROID



"Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Update:  I’ve located a 50amp breaker labeled MAIN.  I turned on Master, electronics come on, and then I pulled the 50amp breaker.  Nothing turned off.  I’ve removed the breaker and would like to know how to test to confirm if it’s working or not.  

 

Should all electronics turn off if I pulled the MAIN breaker?

Corbin


On Jul 29, 2019, at 11:59 AM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

An open alternator output, for example 50a breaker tripped or disconnected wire could cause the field breaker to blow only if the regulator suppling full voltage to the field draws enough current to trip the 5a field breaker. This should not be possible but if the 5a breaker is old and tired and, say, tripping at 3a your could see it trip. I have never seen this happen though. 

Don’t overlook wire fault as a cause, insulation worn through and he wire touching something grounded etc. 

Rick Hole

Email: r.hole@...


On Jul 29, 2019, at 10:23 AM, q2pilot@... [Q-LIST] <Q-LIST@...> wrote:

 

Ok, great news.

 

Now disconnect the Field wire from the back of the alternator and leave hanging.

Does the 5A break still blow?  If it does it's a bad regulator.  If it doesn't blow now, then we may have a shorted field in the alternator.

 

: )

Mike

 

 

 

 

 

 

 

 


Re: Alt Field Circuit Breaker Popping

Jim Patillo
 

Your plane only has one large 50 amp breaker on the panel under the amateur built sign according to Mark. If that’s not tripping it’s probably wiring or the regulator.

Some of us had split the system and installed another 60 a breaker for the alternator on the firewall.

Regards,
Jim
N46JP - Q200


Re: Alt Field Circuit Breaker Popping

Rick Hole
 

I have seen frayed wires cause similar problems

Sonia and Rick Hole
Email: r.hole@...

On Jul 30, 2019, at 1:30 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

Just an update on the alternator field issue.  I replaced the 5 amp breaker but that didn't fix it.  My buddy that has a PP voltage regulator had the 28 volt version and not the 14 volt.

I am going to pull the engine off again this afternoon and run a wire from the Field term, on back of Alternator, to the back of the 5 amp breaker.  If it doesn't pop then I guess the problem is between breaker, voltage regulator, and firewall.


Corbin Ge!ser

On July 29, 2019 at 7:41 PM, "Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Thanks!  I plan on doing this tomorrow.  I found a buddy that has a new PP voltage regulator and some 5 amp breakers.


I’ll replace the breaker and if that doesn’t stop it from popping then I’ll swap the voltage regulator.

Corbin

On Jul 29, 2019, at 4:46 PM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

I often take it on the master solenoid or on the panel cig lighter... If those are inconvenient try the battery + post as long as the master switch is on

Sonia and Rick Hole
Email: r.hole@...

On Jul 29, 2019, at 2:34 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 


This sounds easy to test.....where on bus should I test voltage from?  I am not familiar with working with the bus.  Do I just place the probe anywhere on a good contact along bus?

Corbin Ge!ser

On July 29, 2019 at 2:50 PM, "'Rick Hole' r.hole@... [Q-LIST]" <Q-LIST@...> wrote:

 


The easiest test for a functioning alternator is to read the voltage on the 12V bus.  The battery without alternator will be 12.6 volts or less.  A functioning alternator will show more than 12.6 volts.  Normally the voltage regulator will adjust the field current to produce 13.8v with an automotive regulator and possibly as high as 14.4v with an aircraft regulator.

 

The engine must be running for the alternator to produce power, and may not produce full power at less than about 1600 RPMs.

 

Rick Hole

 

From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Monday, July 29, 2019 12:44 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping

 

 

50 amp breaker is handling the current out from the alternator. It is only active when the alternator is spinning otherwise current from the alternator is zero. Battery charge plus electric items is probably 35 amps right after takeoff. If engine is not turning or field voltage is zero, then all current is coming from the battery.

 

Cheers,

Jay

 

Sent from my Verizon Wireless 4G LTE DROID



"Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Update:  I’ve located a 50amp breaker labeled MAIN.  I turned on Master, electronics come on, and then I pulled the 50amp breaker.  Nothing turned off.  I’ve removed the breaker and would like to know how to test to confirm if it’s working or not.  

 

Should all electronics turn off if I pulled the MAIN breaker?

Corbin


On Jul 29, 2019, at 11:59 AM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

An open alternator output, for example 50a breaker tripped or disconnected wire could cause the field breaker to blow only if the regulator suppling full voltage to the field draws enough current to trip the 5a field breaker. This should not be possible but if the 5a breaker is old and tired and, say, tripping at 3a your could see it trip. I have never seen this happen though. 

Don’t overlook wire fault as a cause, insulation worn through and he wire touching something grounded etc. 

Rick Hole

Email: r.hole@...


On Jul 29, 2019, at 10:23 AM, q2pilot@... [Q-LIST] <Q-LIST@...> wrote:

 

Ok, great news.

 

Now disconnect the Field wire from the back of the alternator and leave hanging.

Does the 5A break still blow?  If it does it's a bad regulator.  If it doesn't blow now, then we may have a shorted field in the alternator.

 

: )

Mike

 









Re: Alt Field Circuit Breaker Popping

Corbin
 

Just an update on the alternator field issue.  I replaced the 5 amp breaker but that didn't fix it.  My buddy that has a PP voltage regulator had the 28 volt version and not the 14 volt.

I am going to pull the engine off again this afternoon and run a wire from the Field term, on back of Alternator, to the back of the 5 amp breaker.  If it doesn't pop then I guess the problem is between breaker, voltage regulator, and firewall.


Corbin Ge!ser

On July 29, 2019 at 7:41 PM, "Corbin Geiser c_geiser@... [Q-LIST]" wrote:

 

Thanks!  I plan on doing this tomorrow.  I found a buddy that has a new PP voltage regulator and some 5 amp breakers.


I’ll replace the breaker and if that doesn’t stop it from popping then I’ll swap the voltage regulator.

Corbin

On Jul 29, 2019, at 4:46 PM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

I often take it on the master solenoid or on the panel cig lighter... If those are inconvenient try the battery + post as long as the master switch is on

Sonia and Rick Hole
Email: r.hole@...

On Jul 29, 2019, at 2:34 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 


This sounds easy to test.....where on bus should I test voltage from?  I am not familiar with working with the bus.  Do I just place the probe anywhere on a good contact along bus?

Corbin Ge!ser

On July 29, 2019 at 2:50 PM, "'Rick Hole' r.hole@... [Q-LIST]" <Q-LIST@...> wrote:

 


The easiest test for a functioning alternator is to read the voltage on the 12V bus.  The battery without alternator will be 12.6 volts or less.  A functioning alternator will show more than 12.6 volts.  Normally the voltage regulator will adjust the field current to produce 13.8v with an automotive regulator and possibly as high as 14.4v with an aircraft regulator.

 

The engine must be running for the alternator to produce power, and may not produce full power at less than about 1600 RPMs.

 

Rick Hole

 

From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Monday, July 29, 2019 12:44 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping

 

 

50 amp breaker is handling the current out from the alternator. It is only active when the alternator is spinning otherwise current from the alternator is zero. Battery charge plus electric items is probably 35 amps right after takeoff. If engine is not turning or field voltage is zero, then all current is coming from the battery.

 

Cheers,

Jay

 

Sent from my Verizon Wireless 4G LTE DROID



"Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Update:  I’ve located a 50amp breaker labeled MAIN.  I turned on Master, electronics come on, and then I pulled the 50amp breaker.  Nothing turned off.  I’ve removed the breaker and would like to know how to test to confirm if it’s working or not.  

 

Should all electronics turn off if I pulled the MAIN breaker?

Corbin


On Jul 29, 2019, at 11:59 AM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

An open alternator output, for example 50a breaker tripped or disconnected wire could cause the field breaker to blow only if the regulator suppling full voltage to the field draws enough current to trip the 5a field breaker. This should not be possible but if the 5a breaker is old and tired and, say, tripping at 3a your could see it trip. I have never seen this happen though. 

Don’t overlook wire fault as a cause, insulation worn through and he wire touching something grounded etc. 

Rick Hole

Email: r.hole@...


On Jul 29, 2019, at 10:23 AM, q2pilot@... [Q-LIST] <Q-LIST@...> wrote:

 

Ok, great news.

 

Now disconnect the Field wire from the back of the alternator and leave hanging.

Does the 5A break still blow?  If it does it's a bad regulator.  If it doesn't blow now, then we may have a shorted field in the alternator.

 

: )

Mike

 









Re: OSH warbird webcam captures quickies

Jerry Marstall <jnmarstall@...>
 

The reason you got two passes is because you went by too fast to see on the first one. 

-------- Original message --------
From: "Keith Welsh kflyav8@... [Q-LIST]" <Q-LIST@...>
Date: 7/30/19 2:14 PM (GMT-05:00)
To: Q-LIST@...
Subject: Re: [Q-LIST] OSH warbird webcam captures quickies

 

Thanks Jim,
I was surprised and honored for the same reasons you just stated.  Don’t know if or how many of you saw it fly in Thursday’s airshow.  After all the brain pounding & butterflies the actual flight was a blast....because our flight leader had done such a good coaching us.  

If anyone noticed we launched top down w/ the fastest planes circling @ 1100’, the second tire circled @ 800’ with the slowest @ 500’, me and the Viggen.  The air boss brought us down from the bottom up.  The crowd passes were @ 200’.  When the Viggen & I landed everyone stepped down till all had done a crowd pass & landed.  The Air Boss had me make a tight pattern to get two passes in.  That was unexpected & told to me right after I broke ground on takeoff.  Much planning, the right combination of people & discipline was necessary to pull this off as cleanly as we did.  We were told in no uncertain terms 4 things to remember....be where your supposed to be, do what your supposed to do, be on time & never loose sight of the plane if front.  The 200’ crowd pass granted by the Air Boss was unusual I’m told for civilian flyers, normally it’s 500’.  

On Tue, Jul 30, 2019 at 10:53 AM JMasal@... [Q-LIST] <Q-LIST@...> wrote:
 

OUTSTANDING kEITH. Especially in view of the weeping, wailing and gnashing of teeth it took you to get there! Also proud that the Osh
judges could recognize the workmanship of an older homebuilt. I was at Osh but didn't see it as my stamina is still crap and I
stuck to the trams. Did see the QAC Quickie from a distance but I thought that one was hanging in a Wash state museum. Was it
moved?

j.


-----Original Message-----
From: Keith Welsh kflyav8@... [Q-LIST] <Q-LIST@...>
To: Q-LIST <Q-LIST@...>
Sent: Mon, Jul 29, 2019 6:53 pm
Subject: Re: [Q-LIST] OSH warbird webcam captures quickies

 
The Quickie received recognition for “Outstanding Workmanship Plans built”
When I registered it upon arriving I almost declined judging.  
I knew thirty years of troubleshooting getting engine temps in line resulting in five overhauls and two engines, three cowl repaints, a few delaminate repairs from being kneed at airshows, two panels and fading of the cockpit material would keep it from being a top tier airplane. 
I started getting curious the more initials that were on the prop card, 15 in all, especially when one judge told me that was a good thing.
 I was surprised when a letter was delivered by the head judge on Friday that the Q would be recognized at Sat evenings awards presentation.  Even though it didn’t get a Lindy the plaque received is pretty especially when considering there were some 4000 homebuilts registered.
The winner in plans built was.......a Long Eze. 


On Mon, Jul 29, 2019 at 4:23 PM JMasal@... [Q-LIST] <Q-LIST@...> wrote:
 
Did I black out suddenly??? I'm reading a lot of Keith congrats but exactly WHAT award did he win?

j



Jay


Re: OSH warbird webcam captures quickies

 

Thanks Jim,
I was surprised and honored for the same reasons you just stated.  Don’t know if or how many of you saw it fly in Thursday’s airshow.  After all the brain pounding & butterflies the actual flight was a blast....because our flight leader had done such a good coaching us.  

If anyone noticed we launched top down w/ the fastest planes circling @ 1100’, the second tire circled @ 800’ with the slowest @ 500’, me and the Viggen.  The air boss brought us down from the bottom up.  The crowd passes were @ 200’.  When the Viggen & I landed everyone stepped down till all had done a crowd pass & landed.  The Air Boss had me make a tight pattern to get two passes in.  That was unexpected & told to me right after I broke ground on takeoff.  Much planning, the right combination of people & discipline was necessary to pull this off as cleanly as we did.  We were told in no uncertain terms 4 things to remember....be where your supposed to be, do what your supposed to do, be on time & never loose sight of the plane if front.  The 200’ crowd pass granted by the Air Boss was unusual I’m told for civilian flyers, normally it’s 500’.  

On Tue, Jul 30, 2019 at 10:53 AM JMasal@... [Q-LIST] <Q-LIST@...> wrote:
 

OUTSTANDING kEITH. Especially in view of the weeping, wailing and gnashing of teeth it took you to get there! Also proud that the Osh
judges could recognize the workmanship of an older homebuilt. I was at Osh but didn't see it as my stamina is still crap and I
stuck to the trams. Did see the QAC Quickie from a distance but I thought that one was hanging in a Wash state museum. Was it
moved?

j.


-----Original Message-----
From: Keith Welsh kflyav8@... [Q-LIST] <Q-LIST@...>
To: Q-LIST <Q-LIST@...>
Sent: Mon, Jul 29, 2019 6:53 pm
Subject: Re: [Q-LIST] OSH warbird webcam captures quickies

 
The Quickie received recognition for “Outstanding Workmanship Plans built”
When I registered it upon arriving I almost declined judging.  
I knew thirty years of troubleshooting getting engine temps in line resulting in five overhauls and two engines, three cowl repaints, a few delaminate repairs from being kneed at airshows, two panels and fading of the cockpit material would keep it from being a top tier airplane. 
I started getting curious the more initials that were on the prop card, 15 in all, especially when one judge told me that was a good thing.
 I was surprised when a letter was delivered by the head judge on Friday that the Q would be recognized at Sat evenings awards presentation.  Even though it didn’t get a Lindy the plaque received is pretty especially when considering there were some 4000 homebuilts registered.
The winner in plans built was.......a Long Eze. 


On Mon, Jul 29, 2019 at 4:23 PM JMasal@... [Q-LIST] <Q-LIST@...> wrote:
 
Did I black out suddenly??? I'm reading a lot of Keith congrats but exactly WHAT award did he win?

j



Jay


Re: OSH warbird webcam captures quickies

JMasal@...
 

OUTSTANDING kEITH. Especially in view of the weeping, wailing and gnashing of teeth it took you to get there! Also proud that the Osh
judges could recognize the workmanship of an older homebuilt. I was at Osh but didn't see it as my stamina is still crap and I
stuck to the trams. Did see the QAC Quickie from a distance but I thought that one was hanging in a Wash state museum. Was it
moved?

j.


-----Original Message-----
From: Keith Welsh kflyav8@... [Q-LIST]
To: Q-LIST
Sent: Mon, Jul 29, 2019 6:53 pm
Subject: Re: [Q-LIST] OSH warbird webcam captures quickies

 
The Quickie received recognition for “Outstanding Workmanship Plans built”
When I registered it upon arriving I almost declined judging.  
I knew thirty years of troubleshooting getting engine temps in line resulting in five overhauls and two engines, three cowl repaints, a few delaminate repairs from being kneed at airshows, two panels and fading of the cockpit material would keep it from being a top tier airplane. 
I started getting curious the more initials that were on the prop card, 15 in all, especially when one judge told me that was a good thing.
 I was surprised when a letter was delivered by the head judge on Friday that the Q would be recognized at Sat evenings awards presentation.  Even though it didn’t get a Lindy the plaque received is pretty especially when considering there were some 4000 homebuilts registered.
The winner in plans built was.......a Long Eze. 


On Mon, Jul 29, 2019 at 4:23 PM JMasal@... [Q-LIST] <Q-LIST@...> wrote:
 
Did I black out suddenly??? I'm reading a lot of Keith congrats but exactly WHAT award did he win?

j



Jay


Re: Would like to buy Q1

Frankenbird Vern
 

Finally got access again. That is a LOT of work. All seems just "make it happen" until about half way through.. a bit like a few Experimental aircraft projects!  50%ers :-)   I can relate to the stone, we have some also in our location. Our place is about 4 miles West of town. High and dry compared to being at the lake. 
 I hope FOD this year is not weathered out. So far it has been a record year for rains. Right now looking much better.   


From: Q-LIST@... <Q-LIST@...> on behalf of Phil Lankford britmcman@... [Q-LIST] <Q-LIST@...>
Sent: Friday, July 26, 2019 7:55 PM
To: Q-LIST@... <Q-LIST@...>
Subject: Re: [Q-LIST] Re: Would like to buy Q1
 
 

Vern:  look up Lankford Waterwheel and you can probably see my brothers front yard in Mannford. https://youtu.be/Motr3LOSmac





On Jul 26, 2019, at 9:57 AM, Vern Lehman smeshno1@... [Q-LIST] <Q-LIST@...> wrote:

 

I wish we had an airport but no dice. Keystone Lake would suffice but floats on a Q bird doesn't seem very practical 😊 On Larisas' Capella XS2.. that is in the plan.


 Yes.. it is a small world.     




From: Q-LIST@... <Q-LIST@...> on behalf of Phil Lankford britmcman@... [Q-LIST] <Q-LIST@...>
Sent: Friday, July 26, 2019 4:20 PM
To: Q-LIST@... <Q-LIST@...>
Subject: Re: [Q-LIST] Re: Would like to buy Q1
 
 

Hello Vern:


I have a brother in Mannford, OK. Small world. 

Phil Lankford


On Jul 26, 2019, at 8:14 AM, Vern Lehman smeshno1@... [Q-LIST] <Q-LIST@...> wrote:

 

 Not to mention the Customs on arrival to Russia!  My second home is in Krasnodar... to obtain container from Novorossiysk

for example..shipped from the East Coast of North America would be a small fortune as the required "gifts" in cash to various

"officials" that also are known to drive all black Mercedes 500 series car. My Russian wife and I have thought of these financial

ventures in a related business. What made us decide otherwise were those very same folks in the black Mercedes.


 What perhaps is possible but not actually done that I  know of (to export to the Federation).. is to fly the aircraft to Providenya Bay,

Magadan, Ekatarinberg, and on to destination.  You see the idea.


 Once in the Federation who can say the requirement to change registration? I would think to be in flying club such as at Karl Marx 

airfield North of Krasnodar would be a likely method that Moscow would approve.  They already own and operate a Douglas DC-3

 now re-registered in the Federation with correct Russian numbers.   


 To do this would take quite an effort and each step only approved by Moscow. Ok.. nothing unusual about this...it is life in Russia.


  The process is requirement for American pilot to either be fluent in Russian, or, have fluent Russian Navigator in the right seat. 

Lets not forget that altitudes are measured differently in Russian Federation airspaces. Altimeter will not be as required n Russian

airspace.


 Other option is you purchase your Q-2  in North America, obtain Visa to travel to Canada and "Tourist" visa to America (must land in Canada

on exit from United States)..if USA Certificated Pilot were to fly to Nome with you this is less troubles still.


From Alaska you would continue on as Pilot in Command to your home airfield.  This is reasonable.  American Pilot can fly

over Canada..you will not need Visa to Canada in that case since you are only transient passenger.      


 Be aware that this flight would of course be only possible from the States in Summer..and to leave USA at Nome Alaska over

the Diomedes.   Good thing is it is only 30 Kilometers distant between Russia and USA... bad thing is weather is quite unpredictable

in the Bering Sea. Both Russia Far East and Alaska are not the best of places to have emergency landing.  

 

  As far as the Customs in Providenya Bay, I presume the engine displacement would determine. We have 2.7 Liter engine, so also the year

of manufacture of the aircraft and the liter size would probably be the basis for Customs entry. Same as rare car muscle car as I have see

at times when visiting in Moscow.  This was the business idea my wife and I thought of to import muscle car to the Federation.


 I would guess that the required "gift" would be more reasonable in the Far East.  One can only know this on arrival.  Because you are

VFR within Russian airspace only Moscow can approve each leg of the flight. They alone will permit departure with specialized flight

plan number.  


Vern Lehman
 Mannford Oklahoma

From: Q-LIST@... <Q-LIST@...> on behalf of letun@... [Q-LIST] <Q-LIST@...>
Sent: Friday, July 26, 2019 4:07 AM
To: Q-LIST@... <Q-LIST@...>
Subject: [Q-LIST] Re: Would like to buy Q1
 
 

Unfortunately, it will be expensive to deliver from this coast, as it will be necessary to transport it across the whole country in a van to the other coast and then send it in a container to Europe. I know that the price of transportation by land will be even more expensive than transportation through the ocean!


Re: OSH warbird webcam captures quickies

Kevin Boddicker
 

Probably!
I'll wake you up in Enid!!
Wire brush to follow!!!!!

On Jul 29, 2019, at 3:47 PM, JMasal@... [Q-LIST] <Q-LIST@...> wrote:

 

Did I black out suddenly??? I'm reading a lot of Keith congrats but exactly WHAT award did he win?

j



Jay




Re: Alt Field Circuit Breaker Popping

Corbin
 

Thanks!  I plan on doing this tomorrow.  I found a buddy that has a new PP voltage regulator and some 5 amp breakers.

I’ll replace the breaker and if that doesn’t stop it from popping then I’ll swap the voltage regulator.

Corbin

On Jul 29, 2019, at 4:46 PM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

I often take it on the master solenoid or on the panel cig lighter.. If those are inconvenient try the battery + post as long as the master switch is on

Sonia and Rick Hole
Email: r.hole@...

On Jul 29, 2019, at 2:34 PM, Corbin Geiser c_geiser@... [Q-LIST] <Q-LIST@...> wrote:

 

This sounds easy to test.....where on bus should I test voltage from?  I am not familiar with working with the bus.  Do I just place the probe anywhere on a good contact along bus?

Corbin Ge!ser

On July 29, 2019 at 2:50 PM, "'Rick Hole' r.hole@... [Q-LIST]" <Q-LIST@...> wrote:

 


The easiest test for a functioning alternator is to read the voltage on the 12V bus.  The battery without alternator will be 12.6 volts or less.  A functioning alternator will show more than 12.6 volts.  Normally the voltage regulator will adjust the field current to produce 13.8v with an automotive regulator and possibly as high as 14.4v with an aircraft regulator.

 

The engine must be running for the alternator to produce power, and may not produce full power at less than about 1600 RPMs.

 

Rick Hole

 

From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Monday, July 29, 2019 12:44 PM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping

 

 

50 amp breaker is handling the current out from the alternator. It is only active when the alternator is spinning otherwise current from the alternator is zero. Battery charge plus electric items is probably 35 amps right after takeoff. If engine is not turning or field voltage is zero, then all current is coming from the battery.

 

Cheers,

Jay

 

Sent from my Verizon Wireless 4G LTE DROID



"Corbin Geiser c_geiser@... [Q-LIST]" <Q-LIST@...> wrote:

 

Update:  I’ve located a 50amp breaker labeled MAIN.  I turned on Master, electronics come on, and then I pulled the 50amp breaker.  Nothing turned off.  I’ve removed the breaker and would like to know how to test to confirm if it’s working or not.  

 

Should all electronics turn off if I pulled the MAIN breaker?

Corbin


On Jul 29, 2019, at 11:59 AM, Rick Hole r.hole@... [Q-LIST] <Q-LIST@...> wrote:

 

An open alternator output, for example 50a breaker tripped or disconnected wire could cause the field breaker to blow only if the regulator suppling full voltage to the field draws enough current to trip the 5a field breaker. This should not be possible but if the 5a breaker is old and tired and, say, tripping at 3a your could see it trip. I have never seen this happen though. 

Don’t overlook wire fault as a cause, insulation worn through and he wire touching something grounded etc. 

Rick Hole

Email: r.hole@...


On Jul 29, 2019, at 10:23 AM, q2pilot@... [Q-LIST] <Q-LIST@...> wrote:

 

Ok, great news.

 

Now disconnect the Field wire from the back of the alternator and leave hanging.

Does the 5A break still blow?  If it does it's a bad regulator.  If it doesn't blow now, then we may have a shorted field in the alternator.

 

: )

Mike

 




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