Today's Message Index:
----------------------
1. 10:58 AM - Wire size question for Z13/8. (Matthew Schumacher)
2. 11:07 AM - Stop nuts one terminal studs? (messydeer)
3. 12:07 PM - Re: Wire size question for Z13/8. (Bob Meyers)
4. 01:08 PM - Re: Wire size question for Z13/8. (Bob Meyers)
5. 02:26 PM - Re: Stop nuts one terminal studs? (Richard Girard)
6. 05:35 PM - Re: More FUD (Fear Uncertainty and Doubt)? (cjay)
7. 08:27 PM - Re: Re: More FUD (Fear Uncertainty and Doubt)? (Robert L. Nuckolls, III)
Message 1
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| Subject: | Wire size question for Z13/8. |
Bob,
I'm looking at Z13/8 getting ready to order wire. I'm looking at the
wire sizes and noticed that the drawing calls for 20awg for the starter
contactor switch and 22awg for the battery contactor switch. Why is
this? Is it because the starter contactor draws more current? Or
perhaps the run is longer?
Thanks,
schu
Message 2
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| Subject: | Stop nuts one terminal studs? |
Hi!
I have a 3/16 to 1/4" studs on my battery, battery contactor, starter contactor
and ground posts. Some came with simple jam-type nuts with a split ring washer.
What type of nuts and washers should I use FWF? I've got MS21042-3 and -4 that
would work for some. Others are metric and wold need a separate lock washer
of sorts.
Thanks!
--------
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=349196#349196
Message 3
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| Subject: | Re: Wire size question for Z13/8. |
Different Bob, but yes, the starter contractor draws much more than the battery
contractor. Typical draw of a starter contractor is around five amps vs. less
than an amp for a battery contractor.
Bob Meyers
Flying my Sonex N982SX - Building log at http://n982sx.com
Sent from my iPad
On Aug 11, 2011, at 12:44 PM, Matthew Schumacher <schu@schu.net> wrote:
>
> Bob,
>
> I'm looking at Z13/8 getting ready to order wire. I'm looking at the
> wire sizes and noticed that the drawing calls for 20awg for the starter
> contactor switch and 22awg for the battery contactor switch. Why is
> this? Is it because the starter contactor draws more current? Or
> perhaps the run is longer?
>
> Thanks,
> schu
>
>
>
>
>
>
Message 4
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| Subject: | Re: Wire size question for Z13/8. |
Seems like my iPad decided I didn't know how to spell and decided to change 'contactor'
into 'contractor'. I hate it when that happens.
Bob Meyers
Flying my Sonex N982SX - Building log at http://n982sx.com
Sent from my iPad
On Aug 11, 2011, at 1:59 PM, Bob Meyers <bobmeyers@meyersfamily.org> wrote:
>
> Different Bob, but yes, the starter contractor draws much more than the battery
contractor. Typical draw of a starter contractor is around five amps vs. less
than an amp for a battery contractor.
>
> Bob Meyers
>
> Flying my Sonex N982SX - Building log at http://n982sx.com
>
> Sent from my iPad
>
> On Aug 11, 2011, at 12:44 PM, Matthew Schumacher <schu@schu.net> wrote:
>
>>
>> Bob,
>>
>> I'm looking at Z13/8 getting ready to order wire. I'm looking at the
>> wire sizes and noticed that the drawing calls for 20awg for the starter
>> contactor switch and 22awg for the battery contactor switch. Why is
>> this? Is it because the starter contactor draws more current? Or
>> perhaps the run is longer?
>>
>> Thanks,
>> schu
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
Message 5
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| Subject: | Re: Stop nuts one terminal studs? |
Dan, If your metric contactor studs are 6mm X 1.0, the 21042-4 will go right
on. I use them on Rotax vibration dampers to mount the radiator on my plane
and they work just fine.
FWIW,
Rick Girard
On Thu, Aug 11, 2011 at 12:56 PM, messydeer <messydeer@yahoo.com> wrote:
>
> Hi!
>
> I have a 3/16 to 1/4" studs on my battery, battery contactor, starter
> contactor and ground posts. Some came with simple jam-type nuts with a split
> ring washer. What type of nuts and washers should I use FWF? I've got
> MS21042-3 and -4 that would work for some. Others are metric and wold need a
> separate lock washer of sorts.
>
> Thanks!
>
> --------
> Dan
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=349196#349196
>
>
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
Message 6
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| Subject: | Re: More FUD (Fear Uncertainty and Doubt)? |
"If you have a fuse/breaker/switch system,
you know where every part comes from and what
spares will cost you for repairs. If the VP
system gets a cold, your airplane is down
while the factory repairs it. It uses software
you didn't write, parts you didn't buy and
couldn't replace even if you had them . . .
'cause you don't understand it. "
The VP system tells you exactly and precisely what device/avionics/electronic is
surging, overloading, shorting, etc. Much more information than a fuse or breaker
provides. Great system for monitoring, tweaking, and measuring. Never
heard of a VP system going back to the factory, but I suppose it happens. What
do you do when a radio/EFIS/autopilot goes bad if you don't send it back to
the factory? Or maybe modern electronics violates your principle of why we choose
to build our own plane? You must be flying with analogue/vacuum gauges.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=349223#349223
Message 7
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| Subject: | Re: More FUD (Fear Uncertainty and Doubt)? |
At 07:27 PM 8/11/2011, you wrote:
"If you have a fuse/breaker/switch system,
you know where every part comes from and what
spares will cost you for repairs. If the VP
system gets a cold, your airplane is down
while the factory repairs it. It uses software
you didn't write, parts you didn't buy and
couldn't replace even if you had them . . .
'cause you don't understand it. "
The VP system tells you exactly and precisely what
device/avionics/electronic is surging, overloading, shorting,
etc. Much more information than a fuse or breaker provides.
In 45 years of working in general aviation and in 25 years
as a pilot, I've never felt the need for knowing such things
in flight . . .
Great system for monitoring, tweaking, and measuring. Never heard of
a VP system going back to the factory, but I suppose it happens.
If you are curious about such things, you can easily
monitor/measure any number of parameters of interest
with commercial off-the-shelf data acquisition systems
that are not integral to the power distribution system.
But believe me, after pouring over a hundred hours
of data where "nothing is happening" I think
you'll find other more interesting things to do
with your time.
You're worrying about things that are first rare
and secondly do not represent a hazard to flight.
What do you do when a radio/EFIS/autopilot goes bad if you don't send
it back to the factory? Or maybe modern electronics violates your
principle of why we choose to build our own plane? You must be
flying with analogue/vacuum gauges.
The airplane does not fall out of the sky when a
radio quits, nor should it fall out of the sky
if some article of power distribution equipment
quits.
That's what failure mode effects analysis and
Plan-B is all about. You reposition a couple of
switches and continue flight to a comfortable arrival
. . . and it doesn't take one byte of software
to do it. We were doing it decades before glass
screens and micro-controllers came along.
It's easy to get enamored of doing a thing simply
because it can be done. Just tonight I had to
struggle through the magic panel on a new radio
in my truck. All I ever wanted was on-off, band,
tune and volume. But this thing stores a qazillion
frequencies, five channels of two bands, plays
flash drives, plays CDs and has an aux audio input
with half octave equalizers and features I can't even
name much less tell you what they do for me. Hat
dancing over the array of 20 buttons will, no doubt,
do some whippy things.
It took me more than a minute to get my grandson's
favorite radio station located and on speakers.
I think your electrical system is a similar situation
with exceedingly simple design goals that do not get
'better cause you can do more'.
Bob . . .
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