Fairchild Club Forum

Posted: **Wed Jul 16, 2003 7:28 pm**

'I have not been able to stop the static produced by the Ranger engine in my
1938 F-24. I put new suppressors on the magnetos, but nothing changed. I
did a continuity check on all the grounding straps and they all had a good
reading. The engine had two straps to the engine mount. There is a ground
strap from the case of each mag. I checked all the plug wire shielding. I
am now wondering if the generator brushes are arcing. Does that make any
sense to anyone. How does a person go about removing the generator ? Do
you have to pull the engine. This plane is short nosed and the generator
sits back under the shelf that the cowling rests on.
I am getting desperate because everyone is complaing that I am
cluttering the airwaves. I have shut off the master switch, no change. The
noise stops when I shut off the mag switch at low rpm. Norby Mc Luckie
Illinois'

Posted: **Wed Jul 16, 2003 7:53 pm**

'When you shut off the Master the generator stops generating. I assume that the noise is rpm dependent. First thing I'd check is the Battery connections. Make sure they are free from corrosion. Is it noisier on one mag or the other? You might have a bad plug wire. Is the grounding wire to each mag shielded on only one end? Are the plug gaps correct? Are you using resistor plugs. Probably have left something out but those are some of the things that might cause your problem.

Cy Galley, TC - Chair, Emergency Aircraft Repair, Oshkosh

Editor, EAA Safety Programs
cgalley@qcbc.org or experimenter@eaa.org

Always looking for articles for the Experimenter

----- Original Message -----
From: Norbert J Mc Luckie
To: fairchildclub@yahoogroups.com
Sent: Wednesday, July 16, 2003 8:28 PM
Subject: [fairchildclub] Radio Static made a Ranger engine

I have not been able to stop the static produced by the Ranger engine in my
1938 F-24. I put new suppressors on the magnetos, but nothing changed. I
did a continuity check on all the grounding straps and they all had a good
reading. The engine had two straps to the engine mount. There is a ground
strap from the case of each mag. I checked all the plug wire shielding. I
am now wondering if the generator brushes are arcing. Does that make any
sense to anyone. How does a person go about removing the generator ? Do
you have to pull the engine. This plane is short nosed and the generator
sits back under the shelf that the cowling rests on.
I am getting desperate because everyone is complaing that I am
cluttering the airwaves. I have shut off the master switch, no change. The
noise stops when I shut off the mag switch at low rpm. Norby Mc Luckie
Illinois

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'

Posted: **Wed Jul 16, 2003 10:11 pm**

'Norbert,

You said "There is a ground strap from the case of each mag". I don't have
any ground strap on my mags. Just for a test, I suggest that you remove
those straps. If there is no change, you could reattach them.

You said "The engine had two straps to the engine mount". I would make sure
that those are healthy straps, and clean and in good condition. mine are
woven flat copper, about 1/2 inch wide, and I have four of them.

Make sure that the P-leads on your mags are grounded at one end of the
P-lead wire, and NOT grounded at the other end of the wire. Make sure that
these P-leads do NOT run near your radio wires.

I would try a hand-held radio with a rubber-ducky antenna. If it works, I
would try the same radio, using the Fairchild's antenna. If it works, then
you can suspect your wiring.

If you can do it easily, I would 'temporarily' run wires from the battery,
directly to the radio. Do NOT fly this way, cause you have temporarily open
the door for Murphy to do a LOT of damage. If your radio works fine this
way, then try leaving the ground connected to the battery, and get the power
from the master switch. If your radio still works fine, then install a
permanent wire from the battery to the radio (or a separate 'radio ground
buss').

I finished my restoration more than eight years ago, and have slept a lot of
times since then (and forgotten a little more, each time I sleep). I think
I had some static when I first started, but have NONE now. Keep at it, it
is a solvable problem.

Regarding your generator being hard to remove: I was told that mine could
NOT be removed without moving the engine. Fortunately, I tried to remove
it, before I moved the engine. I was successful. I removed it twice. Once
to replace it, and once to have an o-ring installed. It truly does look
like it can't come out of there, but mine does.

Good luck.

Bob Waldron
1939 Fairchild 24 K
Stillwater, MN

----- Original Message -----
From: "Norbert J Mc Luckie"
To:
Sent: Wednesday, July 16, 2003 8:28 PM
Subject: [fairchildclub] Radio Static made a Ranger engine

> I have not been able to stop the static produced by the Ranger engine in
my
> 1938 F-24. I put new suppressors on the magnetos, but nothing changed. I
> did a continuity check on all the grounding straps and they all had a good
> reading. The engine had two straps to the engine mount. There is a
ground
> strap from the case of each mag. I checked all the plug wire shielding.
I
> am now wondering if the generator brushes are arcing. Does that make any
> sense to anyone. How does a person go about removing the generator ? Do
> you have to pull the engine. This plane is short nosed and the generator
> sits back under the shelf that the cowling rests on.
> I am getting desperate because everyone is complaing that I am
> cluttering the airwaves. I have shut off the master switch, no change.
The
> noise stops when I shut off the mag switch at low rpm. Norby Mc
Luckie
> Illinois
>
>
>
>
> To unsubscribe from this group, send an email to:
> fairchildclub-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

'

Posted: **Fri Jul 18, 2003 10:25 pm**

'You should be able to pull the Generator fuse on the panel and disable the
generator. If you don't have a fuse, remove the field wire from the
generator. If the generator isn't putting out any juice, it can't generate
noise via the brushes or the regulator.
You could clean the contracts on you regulator. There is one set of the
contacts that are doing a steady dance (open and closed) to provide the
regulation for the output voltage. Each time they open and close, they will
produce a tiny spark, and some noise. Just like lightning would do on an
old AM car radio.

----- Original Message -----
From: "Norbert J Mc Luckie"
To:
Sent: Wednesday, July 16, 2003 6:28 PM
Subject: [fairchildclub] Radio Static made a Ranger engine

> I have not been able to stop the static produced by the Ranger engine in
my
> 1938 F-24. I put new suppressors on the magnetos, but nothing changed. I
> did a continuity check on all the grounding straps and they all had a good
> reading. The engine had two straps to the engine mount. There is a
ground
> strap from the case of each mag. I checked all the plug wire shielding.
I
> am now wondering if the generator brushes are arcing. Does that make any
> sense to anyone. How does a person go about removing the generator ? Do
> you have to pull the engine. This plane is short nosed and the generator
> sits back under the shelf that the cowling rests on.
> I am getting desperate because everyone is complaing that I am
> cluttering the airwaves. I have shut off the master switch, no change.
The
> noise stops when I shut off the mag switch at low rpm. Norby Mc
Luckie
> Illinois
>
>
>
>
> To unsubscribe from this group, send an email to:
> fairchildclub-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

'

Posted: **Fri Jul 18, 2003 10:47 pm**

'Another thought, is the P-leads shielded all the way from the Magneto switch
to Magnetos? For best results, the P-lead should be enclosed in some kind
of a metal housing, and the shielding of the P-lead wire connected to that.
The shield at the Mag switch should encompass the entire back side of the
switch and have continuity all the way back to the mags. Enclosing the
back side of the mag switch with a shield could be easier said than done.

Bob

----- Original Message -----
From: "Norbert J Mc Luckie"
To:
Sent: Wednesday, July 16, 2003 6:28 PM
Subject: [fairchildclub] Radio Static made a Ranger engine

> I have not been able to stop the static produced by the Ranger engine in
my
> 1938 F-24. I put new suppressors on the magnetos, but nothing changed. I
> did a continuity check on all the grounding straps and they all had a good
> reading. The engine had two straps to the engine mount. There is a
ground
> strap from the case of each mag. I checked all the plug wire shielding.
I
> am now wondering if the generator brushes are arcing. Does that make any
> sense to anyone. How does a person go about removing the generator ? Do
> you have to pull the engine. This plane is short nosed and the generator
> sits back under the shelf that the cowling rests on.
> I am getting desperate because everyone is complaing that I am
> cluttering the airwaves. I have shut off the master switch, no change.
The
> noise stops when I shut off the mag switch at low rpm. Norby Mc
Luckie
> Illinois
>
>
>
>
> To unsubscribe from this group, send an email to:
> fairchildclub-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

'

Posted: **Sat Jul 19, 2003 10:22 am**

'Oops, had a brain fart on my statement about pulling the generator fuse.
The other gentleman who said to turn off the master switch was correct, but
that will also kill your radio equipment. Disconnecting the field lead from
the regulator or generator will kill only the generator. If you pull the
lead off the regulator, ensure that it doesn't become grounded while the
motor/generator is running. This could cause the voltage output of the
generator to go higher than 12vdc. If the motor is at or near idle, it
shouldn't be a problem. I vaguely recall, a generator will not put out
12vdc until the engine reaches about 1500rpm or higher.
Bob

----- Original Message -----
From: "Robert Etter"
To:
Sent: Friday, July 18, 2003 9:24 PM
Subject: Re: [fairchildclub] Radio Static made a Ranger engine

> You should be able to pull the Generator fuse on the panel and disable the
> generator. If you don't have a fuse, remove the field wire from the
> generator. If the generator isn't putting out any juice, it can't
generate
> noise via the brushes or the regulator.
> You could clean the contracts on you regulator. There is one set of the
> contacts that are doing a steady dance (open and closed) to provide the
> regulation for the output voltage. Each time they open and close, they
will
> produce a tiny spark, and some noise. Just like lightning would do on an
> old AM car radio.
> ----- Original Message -----
> From: "Norbert J Mc Luckie"
> To:
> Sent: Wednesday, July 16, 2003 6:28 PM
> Subject: [fairchildclub] Radio Static made a Ranger engine
>
>
> > I have not been able to stop the static produced by the Ranger engine in
> my
> > 1938 F-24. I put new suppressors on the magnetos, but nothing changed.
I
> > did a continuity check on all the grounding straps and they all had a
good
> > reading. The engine had two straps to the engine mount. There is a
> ground
> > strap from the case of each mag. I checked all the plug wire shielding.
> I
> > am now wondering if the generator brushes are arcing. Does that make
any
> > sense to anyone. How does a person go about removing the generator ?
Do
> > you have to pull the engine. This plane is short nosed and the
generator
> > sits back under the shelf that the cowling rests on.
> > I am getting desperate because everyone is complaing that I am
> > cluttering the airwaves. I have shut off the master switch, no change.
> The
> > noise stops when I shut off the mag switch at low rpm. Norby Mc
> Luckie
> > Illinois
> >
> >
> >
> >
> > To unsubscribe from this group, send an email to:
> > fairchildclub-unsubscribe@yahoogroups.com
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >
>
>
>
> To unsubscribe from this group, send an email to:
> fairchildclub-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

'

Posted: **Sat Jul 19, 2003 11:27 am**

'Use your handheld and you can check all speeds without any hazard when the master is off.

Cy Galley, TC - Chair, Emergency Aircraft Repair, Oshkosh

Editor, EAA Safety Programs
cgalley@qcbc.org or experimenter@eaa.org

Always looking for articles for the Experimenter

----- Original Message -----
From: Robert Etter
To: fairchildclub@yahoogroups.com
Sent: Saturday, July 19, 2003 11:21 AM
Subject: Re: [fairchildclub] Radio Static made a Ranger engine

Oops, had a brain fart on my statement about pulling the generator fuse.
The other gentleman who said to turn off the master switch was correct, but
that will also kill your radio equipment. Disconnecting the field lead from
the regulator or generator will kill only the generator. If you pull the
lead off the regulator, ensure that it doesn't become grounded while the
motor/generator is running. This could cause the voltage output of the
generator to go higher than 12vdc. If the motor is at or near idle, it
shouldn't be a problem. I vaguely recall, a generator will not put out
12vdc until the engine reaches about 1500rpm or higher.
Bob

----- Original Message -----
From: "Robert Etter"
To:
Sent: Friday, July 18, 2003 9:24 PM
Subject: Re: [fairchildclub] Radio Static made a Ranger engine

> You should be able to pull the Generator fuse on the panel and disable the
> generator. If you don't have a fuse, remove the field wire from the
> generator. If the generator isn't putting out any juice, it can't
generate
> noise via the brushes or the regulator.
> You could clean the contracts on you regulator. There is one set of the
> contacts that are doing a steady dance (open and closed) to provide the
> regulation for the output voltage. Each time they open and close, they
will
> produce a tiny spark, and some noise. Just like lightning would do on an
> old AM car radio.
> ----- Original Message -----
> From: "Norbert J Mc Luckie"
> To:
> Sent: Wednesday, July 16, 2003 6:28 PM
> Subject: [fairchildclub] Radio Static made a Ranger engine
>
>
> > I have not been able to stop the static produced by the Ranger engine in
> my
> > 1938 F-24. I put new suppressors on the magnetos, but nothing changed.
I
> > did a continuity check on all the grounding straps and they all had a
good
> > reading. The engine had two straps to the engine mount. There is a
> ground
> > strap from the case of each mag. I checked all the plug wire shielding.
> I
> > am now wondering if the generator brushes are arcing. Does that make
any
> > sense to anyone. How does a person go about removing the generator ?
Do
> > you have to pull the engine. This plane is short nosed and the
generator
> > sits back under the shelf that the cowling rests on.
> > I am getting desperate because everyone is complaing that I am
> > cluttering the airwaves. I have shut off the master switch, no change.
> The
> > noise stops when I shut off the mag switch at low rpm. Norby Mc
> Luckie
> > Illinois
> >
> >
> >
> >
> > To unsubscribe from this group, send an email to:
> > fairchildclub-unsubscribe@yahoogroups.com
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >
>
>
>
> To unsubscribe from this group, send an email to:
> fairchildclub-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

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[Non-text portions of this message have been removed]

'

Fairchild Club Forum

Re: Radio Static made a Ranger engine

Radio Static made a Ranger engine

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Re: Radio Static made a Ranger engine

Re: Radio Static made a Ranger engine

Re: Radio Static made a Ranger engine

Re: Radio Static made a Ranger engine