Today's Message Index:
----------------------
1. 05:44 AM - Re: My apologies if you feel this is inappropriate.. (ROGER & JEAN CURTIS)
2. 06:57 AM - Bad Contactor Diode? (stearman456)
3. 10:09 AM - Re: My apologies if you feel this is inappropriate.. (Jim Berry)
4. 10:35 AM - Re: Bad Contactor Diode? (Robert L. Nuckolls, III)
5. 10:54 AM - Re: Re: My apologies if you feel this is inappropriate.. (Jared Yates)
6. 12:29 PM - Re: Re: My apologies if you feel this is inappropriate.. (Robert L. Nuckolls, III)
7. 01:57 PM - Re: OS Wig-Wag Project (Fisher Paul A.)
8. 02:14 PM - Re: Re: My apologies if you feel this is inappropriate.. (Henador Titzoff)
9. 02:54 PM - Re: Re: My apologies if you feel this is inappropriate.. (rayj)
10. 04:01 PM - Re: My apologies if you feel this is inappropriate.. (Bill Settle)
11. 05:12 PM - Re: My apologies if you feel this is inappropriate.. (Charlie England)
12. 07:37 PM - Re: Bad Contactor Diode? (Daniel Jones)
13. 10:11 PM - Re: Bad Contactor Diode? (Robert L. Nuckolls, III)
Message 1
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| Subject: | My apologies if you feel this is inappropriate.. |
But some things to me are just mind boggling.
http://www.wthr.com/video?clipId=7054149&topVideoCatNo=103348&autoSta
rt=true
Bill B
Inappropriate, perhaps, but in another 4
years, if we keep on our present track of government corruption,
electron
herding will be the least of our problems. But this is not the place to
discuss politics.
Roger
Do not archive
Message 2
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| Subject: | Bad Contactor Diode? |
Recently a friend of mine purchased an RV-6A, and shortly after buying it he turned
the master switch on one morning, there was a "poof", and the wire supplying
the ground to the battery contactor burnt up.
The airplane needed some major electrical work (even prior to this). It was wired
basically according to Z-11 (I recognized the architecture straight away)
but CRUDE! Cripes... Anyway, we changed out the contactor as it was pretty rough
looking and I had a new one on the shelf from Spruce. But it didn't have
a spark catching diode so we used the old diode that the previous owner had made
up. This time when he powered it up (hanging onto the ground wire) he felt
the wire getting hot immediately and killed the power before anything flamed.
Changed the contactor completely and put a new one from B&C (with the supplied
diode) in and the problem went away. So my question is, if the diode goes
on the contactor, do you normally end up with a shorted out contactor? And if
you do, is there a fix or a safety, like putting a fuseable link in the contactor
ground wire?
Thanks for all the help.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372625#372625
Message 3
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| Subject: | Re: My apologies if you feel this is inappropriate.. |
Did you really need to ask whether this is inappropriate here?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372637#372637
Message 4
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| Subject: | Re: Bad Contactor Diode? |
At 08:56 AM 5/8/2012, you wrote:
Recently a friend of mine purchased an RV-6A, and shortly after
buying it he turned the master switch on one morning, there was a
"poof", and the wire supplying the ground to the battery contactor burnt up.
This is an exceedingly rare event. So rare that
legacy design goals in TC aircraft do not incorporate
any form of protection for this particular wire . . .
The airplane needed some major electrical work (even prior to
this). It was wired basically according to Z-11 (I recognized the
architecture straight away) but CRUDE! Cripes... Anyway, we changed
out the contactor as it was pretty rough looking and I had a new one
on the shelf from Spruce. But it didn't have a spark catching diode
so we used the old diode that the previous owner had made up. This
time when he powered it up (hanging onto the ground wire) he felt the
wire getting hot immediately and killed the power before anything
flamed. Changed the contactor completely and put a new one from B&C
(with the supplied diode) in and the problem went away.
Helpful observations. These contactors don't generally
short. Their most common failure mode is errosion of contacts
followed in frequency by open coil. About 15 months ago we
did a tear-down inspection on a new-contactor failure. The
thread of this discussion can be found at:
http://tinyurl.com/6mu7gba
with pictures at:
http://tinyurl.com/7petyz8
In this case, the contactor suffered from assembly error
where the coil wires were not properly soldered.
So my question is, if the diode goes on the contactor, do you
normally end up with a shorted out contactor?
Do you still have the old parts? Measure the resistance
of the contactor coils. Odds are high that they're okay
and will measure something on the order of 15 ohms. Also
check the diode with an ohmmeter. I'm betting that you
see equally LOW (short) resistance both ways through the
diode.
And if you do, is there a fix or a safety, like putting a fuseable
link in the contactor ground wire?
You can do this. A 5A in-line fuse right at the contactor
would prevent a repeat . . . but I'd be interested in
knowing what the part number and source was for the diode.
It may be little comfort to say that this is a rare event . . .
when an airplane right in front of you has suffered the
failure. I can only offer that it's not even a low-order
concern in TC or OBAM aircraft. At the same time, adding
the protection is similarly low risk.
Thanks for all the help.
If an when you identify the shorted part, I'd like to
know which part and perhaps have it for inspection.
Thanks!
Bob . . .
Message 5
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| Subject: | Re: My apologies if you feel this is inappropriate.. |
I don't see where he did ask- he said in the subject line that he knew
it was inappropriate, but he posted it anyway. That says a lot to me
about his level of respect for we list members (or the lack thereof),
and for the list itself. Sometimes you can just hand someone a paint
brush and they'll gladly paint for you with their true colors.
On Tue, May 8, 2012 at 1:05 PM, Jim Berry <jimberry@qwest.net> wrote:
>
> Did you really need to ask whether this is inappropriate here?
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=372637#372637
>
>
Message 6
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| Subject: | Re: My apologies if you feel this is inappropriate.. |
At 12:50 PM 5/8/2012, you wrote:
>
>I don't see where he did ask- he said in the subject line that he knew
>it was inappropriate, but he posted it anyway. That says a lot to me
>about his level of respect for we list members (or the lack thereof),
>and for the list itself. Sometimes you can just hand someone a paint
>brush and they'll gladly paint for you with their true colors.
Let's not project words or thoughts into this list member's
head. It isn't like he was promoting a work-from-home scam
or amazing cancer cure.
I think the point has been made.
Bob . . .
Message 7
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| Subject: | OS Wig-Wag Project |
Bob,
I'd like one of the boards. I'm not sure if I'll be herding bytes, or they will
be herding me, but I'd like to try! Please let me know what I owe you for it.
Greg - as long as I've got your code, I'll try to flash my own chip... but I'll
contact you if I can't get it to work!! ;-)
Thank you!!
Paul A. Fisher
8428 114th Avenue West
Taylor Ridge, Illinois 61284
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III
Sent: Friday, May 04, 2012 12:18 PM
Subject: Re: AeroElectric-List: OS Wig-Wag Project
The boards are here and I've stuffed some of the
parts. Thought I'd ordered the IRF6201 hex-fets
but that slipped under the rug. Those are on order
and should be here Monday. May have the development
articles ready to mail then.
How many folks are herding bytes for this board
configuration and need hardware? I need mailing
addresses.
Bob . . .
Message 8
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| Subject: | Re: My apologies if you feel this is inappropriate.. |
The strange thing about these off subject emails is that we can choose to l
eave them alone, yet there is always someone who will not; thus, we get a r
ash of responses that further eat up our precious time. I wouldn't be surpr
ised if we get 20 more responses by the time this is all over with, all pre
tty much saying the same thing.=0A=0AMr. Bradburro, if all you meant to do
was alert us to the state of our declining country, mission accomplished.
-If you meant to get attention and start mass hysteria, mission accomplis
hed.=0A-=0AHenador Titzoff=0A=0A=0A=0A________________________________=0A
From: Jared Yates <email@jaredyates.com>=0ATo: aeroelectric-list@matronics
.com =0ASent: Tuesday, May 8, 2012 1:50 PM=0ASubject: Re: AeroElectric-List
: Re: My apologies if you feel this is inappropriate..=0A =0A--> AeroElectr
ic-List message posted by: Jared Yates <email@jaredyates.com>=0A=0AI don't
see where he did ask- he said in the subject line that he knew=0Ait was ina
ppropriate, but he posted it anyway.- That says a lot to me=0Aabout his l
evel of respect for we list members (or the lack thereof),=0Aand for the li
st itself.- Sometimes you can just hand someone a paint=0Abrush and they'
ll gladly paint for you with their true colors.=0A=0AOn Tue, May 8, 2012 at
1:05 PM, Jim Berry <jimberry@qwest.net> wrote:=0A> --> AeroElectric-List m
essage posted by: "Jim Berry" <jimberry@qwest.net>=0A>=0A> Did you really n
eed to ask whether this is inappropriate here?=0A>=0A>=0A>=0A>=0A> Read thi
s topic online here:=0A>=0A> http://forums.matronics.com/viewtopic.php?p=
==============
Message 9
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| Subject: | Re: My apologies if you feel this is inappropriate.. |
Perhaps this 20 will save us from 200, if we do what we can to
discourage this activity. Insert camel's nose parable here.
do not archive
Raymond Julian
Kettle River, MN
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 05/08/2012 04:12 PM, Henador Titzoff wrote:
> The strange thing about these off subject emails is that we can choose
> to leave them alone, yet there is always someone who will not; thus, we
> get a rash of responses that further eat up our precious time. I
> wouldn't be surprised if we get 20 more responses by the time this is
> all over with, all pretty much saying the same thing.
>
> Mr. Bradburro, if all you meant to do was alert us to the state of our
> declining country, mission accomplished. If you meant to get attention
> and start mass hysteria, mission accomplished.
> Henador Titzoff
>
> ------------------------------------------------------------------------
> *From:* Jared Yates <email@jaredyates.com>
> *To:* aeroelectric-list@matronics.com
> *Sent:* Tuesday, May 8, 2012 1:50 PM
> *Subject:* Re: AeroElectric-List: Re: My apologies if you feel this is
> inappropriate..
>
> <email@jaredyates.com <mailto:email@jaredyates.com>>
>
> I don't see where he did ask- he said in the subject line that he knew
> it was inappropriate, but he posted it anyway. That says a lot to me
> about his level of respect for we list members (or the lack thereof),
> and for the list itself. Sometimes you can just hand someone a paint
> brush and they'll gladly paint for you with their true colors.
>
> On Tue, May 8, 2012 at 1:05 PM, Jim Berry <jimberry@qwest.net
> <mailto:jimberry@qwest.net>> wrote:
> <jimberry@qwest.net <mailto:jimberry@qwest.net>>
> >
> > Did you really need to ask whether this is inappropriate here?
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=372637#372637
> >
> >
> >
> >
> >
> >
> >
> >
> >http://www.matronics.com/Navigator?AeroElectrice great content also
> available via -Mat==============
>
>
> *
>
>
> *
Message 10
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| Subject: | Re: My apologies if you feel this is inappropriate.. |
I'm not offended at all. Thanks for sharing.
do not archive
________________________________
From: Bill Bradburry <bbradburry@bellsouth.net>
Sent: Mon, May 7, 2012 11:44:14 PM
Subject: AeroElectric-List: My apologies if you feel this is inappropriate..
But some things to me are just mind boggling.
http://www.wthr.com/video?clipId=7054149&topVideoCatNo=103348&autoStart=true
Bill B
Message 11
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| Subject: | Re: My apologies if you feel this is inappropriate.. |
On 05/08/2012 07:42 AM, ROGER & JEAN CURTIS wrote:
> But some things to me are just mind boggling.
>
>
> http://www.wthr.com/video?clipId=7054149&topVideoCatNo=103348&autoStart=true
>
> Bill B
>
> Inappropriate, perhaps, but in another 4
> years, if we keep on our present track of government corruption, electron
> herding will be the least of our problems. But this is not the place to
> discuss politics.
>
> Roger
>
>
> Do not archive
Then why did you take your political shot & then expect others to not
respond?
I might not disagree with your sentiment, but I'd also ask, where were
your complaints while we were being painted into this corner?
Charlie
Message 12
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| Subject: | Re: Bad Contactor Diode? |
Hi Bob,
I know I have the diode and the first replacement contactor, and I'm pretty sure
the original contactor is still in the bottom of the garbage can in the shop.
I'll box it all up and get it headed your way this week. I'd appreciate reading
the autopsy report once you've had a look at it.
Dan Jones
warbirds@shaw.ca
----- Original Message -----
From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
Sent: Tuesday, May 8, 2012 11:31:45 AM
Subject: Re: AeroElectric-List: Bad Contactor Diode?
At 08:56 AM 5/8/2012, you wrote:
Recently a friend of mine purchased an RV-6A, and shortly after buying it he turned
the master switch on one morning, there was a "poof", and the wire supplying
the ground to the battery contactor burnt up.
This is an exceedingly rare event. So rare that legacy design goals in TC aircraft
do not incorporate any form of protection for this particular wire . . .
The airplane needed some major electrical work (even prior to this). It was wired
basically according to Z-11 (I recognized the architecture straight away) but
CRUDE! Cripes... Anyway, we changed out the contactor as it was pretty rough
looking and I had a new one on the shelf from Spruce. But it didn't have a spark
catching diode so we used the old diode that the previous owner had made
up. This time when he powered it up (hanging onto the ground wire) he felt the
wire getting hot immediately and killed the power before anything flamed. Changed
the contactor completely and put a new one from B&C (with the supplied diode)
in and the problem went away.
Helpful observations. These contactors don't generally short. Their most common
failure mode is errosion of contacts followed in frequency by open coil. About
15 months ago we did a tear-down inspection on a new-contactor failure. The
thread of this discussion can be found at:
http://tinyurl.com/6mu7gba
with pictures at:
http://tinyurl.com/7petyz8
In this case, the contactor suffered from assembly error where the coil wires were
not properly soldered.
So my question is, if the diode goes on the contactor, do you normally end up with
a shorted out contactor?
Do you still have the old parts? Measure the resistance of the contactor coils.
Odds are high that they're okay and will measure something on the order of 15
ohms. Also check the diode with an ohmmeter. I'm betting that you see equally
LOW (short) resistance both ways through the diode.
And if you do, is there a fix or a safety, like putting a fuseable link in the
contactor ground wire?
You can do this. A 5A in-line fuse right at the contactor would prevent a repeat
. . . but I'd be interested in knowing what the part number and source was for
the diode. It may be little comfort to say that this is a rare event . . .
when an airplane right in front of you has suffered the failure. I can only offer
that it's not even a low-order concern in TC or OBAM aircraft. At the same
time, adding the protection is similarly low risk.
Thanks for all the help.
If an when you identify the shorted part, I'd like to know which part and perhaps
have it for inspection. Thanks!
Bob . . .
Message 13
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| Subject: | Re: Bad Contactor Diode? |
At 09:23 PM 5/8/2012, you wrote:
>
>Hi Bob,
>
>I know I have the diode and the first replacement contactor, and I'm
>pretty sure the original contactor is still in the bottom of the
>garbage can in the shop. I'll box it all up and get it headed your
>way this week. I'd appreciate reading the autopsy report once
>you've had a look at it.
Very good.
Bob . . .
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