Today's Message Index:
----------------------
1. 05:59 AM - Re: Re: AIRCAM Schematic or ideas (Chris)
2. 08:18 AM - Re: SD-8 S704-1 relay with or without Diode when using OVM-14? (plevyakh)
3. 08:25 AM - Re: Good news . . . and bad news (Bill)
4. 08:17 PM - Compatable Shunt (fedico94@mchsi.com)
Message 1
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Subject: | Re: AIRCAM Schematic or ideas |
Right, but I was picking up on your comment that the "alternators are not
designed to run parallel on a single bus".
I have been wondering if there is a load sharing problem that would be
encountered or any other electrical gremlins I am not smart enough to know
about.
Thanks
Chris
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of nuckollsr
Sent: Saturday, September 29, 2012 11:02 PM
Subject: AeroElectric-List: Re: AIRCAM Schematic or ideas
--> <bob.nuckolls@aeroelectric.com>
Probably nothing serious. But it might mask failure of one alternator when
the second one shoulders the loads. A failure that become latent and
unnoticed until next preflight. Better that you know it before you land as
opposed to just before you wanted to take off.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=384290#384290
Message 2
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Subject: | Re: SD-8 S704-1 relay with or without Diode when using |
OVM-14?
Bob,
Thank-you very much for the replies. I was able to calibrate my OVMs and get them
both (SD-8 Alternator, and Ground Power) installed yesterday.
I greatly appreciate all you do for our OBAM community. Without AEC I'd be lost.
My electrical system installation is coming right along.
Sincerely,
Howard
--------
Howard Plevyak
GlaStar / North Bend, Ohio
hplevyak@mac.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=384316#384316
Message 3
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Subject: | Re: Good news . . . and bad news |
Let me know when this gets sorted out - I'm still trying to come to terms
with the "buttered-cat array".
On Sat, Sep 29, 2012 at 12:15 PM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> nuckolls.bob@aeroelectric.com**>
>
>
> At 10:21 AM 9/29/2012, you wrote:
>
>> Hi Bob,
>>
>>> Price is hard to beat! One would need an instrumentation
>>> amplifier to read current shunts . . . but the AD628 makes
>>> that really simple. Just need a 36-hour day . . .
>>>
>> I have two partial solutions to your dilemma of a 36-hour day. ;-)
>> Unfortunately nobody I have talked to likes my ideas:
>>
>
> I'll bet you could get a patent on it . . . the
> patent office is exceedingly accepting of ideas
> irrespective of efficacy or merchantability.
>
> But having a patent preserves the idea
> in perpetuity!
>
>
> Bob . . .
>
>
Message 4
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Subject: | Compatable Shunt |
My RV9-A uses the Z-12 drawing. I installed a G3X unit (two Garmin GDU's 37x).
The ammeter does not read but the voltmeter does. Reviewing the schematic provided
by Garmin for connecting the two instumentation wires to the Shunt and
comparing this to the Z-12 schematic I see both are essentially the same. The
shunt sent to me by the Avionics shop for use with the Garmin is 100 amp/50mv
and the one B & C supplied and installed in the plane is 60 amp at 50mv. My
confusion and question concerns the schematic from Garmin that says the shunt
is rated at 0.0005 Ohm. The B & C supplied system with its shunt is 50mv/60
amp gives me 0.00083 Ohm.
First are my calculations correct and second does this have any bearing on the
inability to display the ammeter reading ? If the above is not contributing to
the problem should I look elsewhere in the system for the problem ? (Prior
to turning on the field of the 60 amp alternator I get the main volts waring light
flashing and goes off after the field is activated. Remainder of G3X works
fine)
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