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0. 12:42 AM - The Value of a Forum... (Matt Dralle)
1. 05:24 PM - Re: Pre flight Problem (Lloyd & Lorrie Cudnohufsky)
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| Subject: | The Value of a Forum... |
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| Subject: | Pre flight Problem |
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'm 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't 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't 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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