Today's Message Index:
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1. 08:36 AM - Cleaning house (Robert L. Nuckolls, III)
2. 09:05 AM - Re: FAT Wire Pt Implementation Question (Robert L. Nuckolls, III)
3. 09:32 AM - Re: Master Relay Typical Resistance (long Story) (Radioflyer)
4. 10:35 AM - Re: Primary Power Diagram RV-14 (Mudfly)
5. 11:18 AM - Re: Re: Primary Power Diagram RV-14 (Charlie England)
6. 01:07 PM - Re: Cleaning house (Rivets are SOLD) (Robert L. Nuckolls, III)
Message 1
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Ran across an assortment of rivets I've had
around for longer than I can remember . . . one
of you guys bought my #3 rivet gun a few years
ago so I could not use these rivets even if I wanted.
The box weighs in at just over 5 pounds. Best USPS
shipping to US addresses is $20. If any of you
would like to acquire this assortment of rivets,
drop me a direct mail request and I'll PayPal
invoice you for the postage.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 2
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| Subject: | Re: FAT Wire Pt Implementation Question |
>
>Is using this smaller #10 stud for my main power feed FAT wire point
>a poor choice? I ask because most #4 wire connects to 0.31" studs in
>my experience, though I am a novice at this. Can the smaller #10
>stud handle continuous larger currents at 12V like the 0.31" stud can?
EXCEPT for the instance where the stud is also a carry-thru conductor,
the size of the stud and/or it's material is of very minor importance
in the calculus of power path integrity.
Recall that the holy-grail of connection integrity is GAS TIGHTNESS . . .
i.e. made the mating of power path components as close as practical
to one piece of metal.
Recall our studies of crimped terminal physics and the art of
soldering terminals to fat wires. No voids in the interface
between terminal and wire strands. Similarly, bringing the
terminal flags together . . . or into good contact with the
appliance stud is a function of PRESSURE (force/area) where
the ideal interface actually deforms the surface of the
mating components (this is one reason that copper is universally
preferred for terminal material).
The size of the stud is not particularly important as long
as it meets the goals of holding things together.
>Should I change to device with a 0.31" stud for my hot wire point,
>to prevent either overheating hazards or unnecessary resistance/loss
>in the wire path? What do people commonly use for FAT wire points? I
>don't see many single junction posts available in aviation catalogs,
>lots on Amazon but questionable quality.
Short answer: No. Any interconnection technology that
depends on threaded devices for CONDUCTION pathway
integrity is to be carefully evaluated for suitability
to task . . . when in doubt . . . don't. But when your
flat surfaces are inseparably forced into gas-tight
togetherness, thread size is not part of the electrical
equation. Note the thread size on this 200A fuse holder.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 3
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| Subject: | Re: Master Relay Typical Resistance (long Story) |
Bob N. and others...Thanks for your comments. I did replace the high milliOhm battery
contactor with a new Cole-Hersee unit. I also replaced for good measure
the battery master switch since the original contactor was not fitted with a
suppression diode.
Overall, it made no difference to my 15+ overvoltage and occasional alternator
dropouts. Further tracing of Voltages indicated that the Voltage Regulator was
getting same V as present directly at the battery and yet not "regulating" so
I replaced the Voltage regulator. Problem solved (for now)!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=510204#510204
Message 4
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| Subject: | Re: Primary Power Diagram RV-14 |
Thanks gentlemen.
After further review I will be moving my Hot Bat Bus fuse holder firewall fwd.
It finally dawned on me that there could be a issue with the fuse holder itself
that could cause smoke/fumes, but not enough to blow 30A current limiter.
There would be no way to stop it. I get it now. Also, I will probably remove
the move landing and nav lights and put them on the main power bus. I was trying
to keep my main power bus CB panel at 25 CBs so I would have a 5x5 setup.
Seemed easier and cleaner when installing copper bus strips. I will cross
that bridge later.
Thanks again!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=510205#510205
Message 5
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| Subject: | Re: Primary Power Diagram RV-14 |
On 2/16/2023 12:34 PM, Mudfly wrote:
>
> Thanks gentlemen.
> After further review I will be moving my Hot Bat Bus fuse holder firewall fwd.
It finally dawned on me that there could be a issue with the fuse holder itself
that could cause smoke/fumes, but not enough to blow 30A current limiter.
There would be no way to stop it. I get it now. Also, I will probably remove
the move landing and nav lights and put them on the main power bus. I was
trying to keep my main power bus CB panel at 25 CBs so I would have a 5x5 setup.
Seemed easier and cleaner when installing copper bus strips. I will cross
that bridge later.
> Thanks again!
I've got you a deal on a bridge, right here.
;-)
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Message 6
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| Subject: | Re: Cleaning house (Rivets are SOLD) |
The rivets are SOLD
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
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