Today's Message Index:
----------------------
1. 09:35 AM - Re: Pre flight Problem (Pete Christensen)
2. 06:38 PM - Re: Pre flight Problem (Lloyd & Lorrie Cudnohufsky)
Message 1
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| Subject: | Re: Pre flight Problem |
Lloyd,
I went through what you are going through 3 years ago. After a couple weeks o
f trying to troubleshoot the problem,I broke down and bought a new reg/recti
fier.
I mounted it in an aluminum heatsink, jumped in my plane and went flying. N
o more problems.
Pete
Leander, TX
Kitfox III Sn 1000
912
Sent from my iPad
On Nov 19, 2011, at 7:22 PM, "Lloyd & Lorrie Cudnohufsky" <7suds@Chartermi.n
et> wrote:
> Noel, Pete,
>
> Thanks for the replies, I have been retracing wiring and checking ground c
ontinuity since the weather here has kept me from getting the plane out of t
he hanger and starting it. Some of the wiring I did and some was from the or
iginal build and during my reviewing / testing I noticed that the red lead f
rom the Kuntzelman hotbox that goes to the (R,+B,C) terminals on the Regulat
or also had a tap that went to a breaker on the instrument panel that feeds a
ll the other breakers, not sure if I did this or if it was like that from th
e original build, either way I endorsed it because it is still there. Not su
re if this would cause the regulator to fry, even if not I=99m not sur
e I like the arrangement since all the DC power to the panel would not be fi
ltered through the hotbox. Weather is supposed to get a little more tolerabl
e here next week, I think I will take you advise and see if there is a place
that can test the regulator / rectifier for me before I continue with start
ing the engine and testing for the AC.
>
>
>
> Thank you very much for the replies,
>
> Lloyd
>
>
>
> From: owner-kitfox-list-server@matronics.com [mailto:owner-kitfox-list-ser
ver@matronics.com] On Behalf Of Pete Christensen
> Sent: Friday, November 18, 2011 4:56 PM
> To: kitfox-list@matronics.com
> Subject: Re: Kitfox-List: Pre flight Problem
>
>
>
> Sorry Noel! Make that a Large Chance that the rectifier/regulator has gone
on strike.
>
> Pete
> Leander, TX
> Kitfox III, 912
>
> On 11/18/2011 11:56 AM, Noel Loveys wrote:
>
> You can test the output of your alternator with an AC voltmeter. Output s
hould be well over 16V at cruise RPM. Generally there are two things that c
an go wrong with an alternator.
>
> One is the brushes wear out. If this happens you will observe a short per
iod of time where the system charges, doesn=99t charge, charges etc. I
n other words charges intermittently.
>
>
>
> Another thing that can generally go wrong with the alternator is the field
coil can burn open. No field produced by the field coil no output from the
alternator. Related to this is bushings on the alternator can wear enough t
o allow the field coil to short against the interior of the housing.... Sam
e effect as above. Note the Rotax 582 engines don=99t have a field co
il. They have a dirt big magnet instead so they use a system of shunting ex
cess power to ground. This means if your stator coils ring out true the pro
blem is probably in your regulator/rectifier.
>
>
>
> This is where I have noticed most of the problems come from. The rectifie
r regulator generally requires a good ground through the back of its case.
First thing to do is remove the rectifier/regulator, clean its back and the s
pace it will occupy on the firewall and reinstall it. The next thing to do i
s to locate the braid that goes from the engine to the frame of the plane. M
ake sure the connections on both ends of this braid are shiny clean too.
>
>
>
> There is a small chance that your rectifier/regulator has gone on strike.
You can get it checked out at any automotive shop that specializes in start
er motors, etc.
>
>
>
> Hope this helps
>
>
>
> Noel
>
>
>
>
>
>
rtermi.net>
>
> Guys,
> Getting ready for my maiden voyage and am having a problem with charging. M
y
> amp meter shows a negative draw and the volt meter shows 12 volts, as I tu
rn
> things on the amp draw goes more negative. All indications are that the
> system is not charging, I am running a Kuntzleman Hotbox. Pretty sure all i
s
> wired correct. Any suggestions where to start? Can I check the AC output o
f
> the charging coils? Any chance that the voltage regulator would be the
> culprit?
> Also on a side note, is anyone monitoring their cooling water temp other
> than as CHT? If so where do you have the probe and what are you seeing for
> water temp?
>
> Thanks,
> Lloyd C
> 5 Outback 912ul IVO IFA
> Northern Mi.
>
>
>
>
>
>
>
>
>
> www.aeroelectric.com<www.buildersbooks.comwww.homebuilthelp.comhttp://www.
matronics.com/c= -Matt Dralle, List -
The Kitfox-List Email Forum utilities such as List Photoshare, and much muc
h --> http://www.matron=================
==< - content also available via the Web --> http://forums.
matronics.com - List Contribution Web generous nbsp;
--> http://www.matronics.com/c
>
>
>
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>
Message 2
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| Subject: | Pre flight Problem |
Pete,
That thought has always been in the back of my head and I have been
researching where I can get a replacement regulator rectifier in case it
comes to that, I have seen postings by some 912 owners who have not had
great luck with the Ducati regulator rectifiers and have suggested the
use of a John Deere AM101406, any thoughts on alternatives to the
Ducati? Used a Keywest on my Model 4 that was running a Rotax 503, ever
hear of anyone using one on a 912?
Lloyd
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Pete
Christensen
Sent: Sunday, November 20, 2011 11:33 AM
Subject: Re: Kitfox-List: Pre flight Problem
Lloyd,
I went through what you are going through 3 years ago. After a couple
weeks of trying to troubleshoot the problem,I broke down and bought a
new reg/rectifier.
I mounted it in an aluminum heatsink, jumped in my plane and went
flying. No more problems.
Pete
Leander, TX
Kitfox III Sn 1000
912
Sent from my iPad
On Nov 19, 2011, at 7:22 PM, "Lloyd & Lorrie Cudnohufsky"
<7suds@Chartermi.net> wrote:
Noel, Pete,
Thanks for the replies, I have been retracing wiring and checking ground
continuity since the weather here has kept me from getting the plane out
of the hanger and starting it. Some of the wiring I did and some was
from the original build and during my reviewing / testing I noticed that
the red lead from the Kuntzelman hotbox that goes to the (R,+B,C)
terminals on the Regulator also had a tap that went to a breaker on the
instrument panel that feeds all the other breakers, not sure if I did
this or if it was like that from the original build, either way I
endorsed it because it is still there. Not sure if this would cause the
regulator to fry, even if not I=99m not sure I like the
arrangement since all the DC power to the panel would not be filtered
through the hotbox. Weather is supposed to get a little more tolerable
here next week, I think I will take you advise and see if there is a
place that can test the regulator / rectifier for me before I continue
with starting the engine and testing for the AC.
Thank you very much for the replies,
Lloyd
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Pete
Christensen
Sent: Friday, November 18, 2011 4:56 PM
Subject: Re: Kitfox-List: Pre flight Problem
Sorry Noel! Make that a Large Chance that the rectifier/regulator has
gone on strike.
Pete
Leander, TX
Kitfox III, 912
On 11/18/2011 11:56 AM, Noel Loveys wrote:
You can test the output of your alternator with an AC voltmeter. Output
should be well over 16V at cruise RPM. Generally there are two things
that can go wrong with an alternator.
One is the brushes wear out. If this happens you will observe a short
period of time where the system charges, doesn=99t charge, charges
etc. In other words charges intermittently.
Another thing that can generally go wrong with the alternator is the
field coil can burn open. No field produced by the field coil no output
from the alternator. Related to this is bushings on the alternator can
wear enough to allow the field coil to short against the interior of the
housing.... Same effect as above. Note the Rotax 582 engines
don=99t have a field coil. They have a dirt big magnet instead so
they use a system of shunting excess power to ground. This means if
your stator coils ring out true the problem is probably in your
regulator/rectifier.
This is where I have noticed most of the problems come from. The
rectifier regulator generally requires a good ground through the back of
its case. First thing to do is remove the rectifier/regulator, clean
its back and the space it will occupy on the firewall and reinstall it.
The next thing to do is to locate the braid that goes from the engine to
the frame of the plane. Make sure the connections on both ends of this
braid are shiny clean too.
There is a small chance that your rectifier/regulator has gone on
strike. You can get it checked out at any automotive shop that
specializes in starter motors, etc.
Hope this helps
Noel
<7suds@chartermi.net>
Guys,
Getting ready for my maiden voyage and am having a problem with
charging. My
amp meter shows a negative draw and the volt meter shows 12 volts, as I
turn
things on the amp draw goes more negative. All indications are that the
system is not charging, I am running a Kuntzleman Hotbox. Pretty sure
all is
wired correct. Any suggestions where to start? Can I check the AC output
of
the charging coils? Any chance that the voltage regulator would be the
culprit?
Also on a side note, is anyone monitoring their cooling water temp other
than as CHT? If so where do you have the probe and what are you seeing
for
water temp?
Thanks,
Lloyd C
5 Outback 912ul IVO IFA
Northern Mi.
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