Today's Message Index:
----------------------
1. 07:29 AM - Re: RV10 Electrical Issue (w/ Format Clean Up) (Robert L. Nuckolls, III)
2. 08:07 AM - Re: RV10 Electrical Issue (w/ Format Clean Up) (Charlie England)
3. 08:51 AM - Re: Re: Monarch EE Anti-Plugging Field Accelerating? (Robert L. Nuckolls, III)
4. 09:01 AM - Re: RV10 Electrical Issue (w/ Format Clean Up) (Robert L. Nuckolls, III)
5. 01:52 PM - Ground LC3C controllers (Dan)
6. 02:16 PM - Re: Ground LC3C controllers (Robert L. Nuckolls, III)
7. 02:47 PM - Shielding for strobes (Dan)
8. 05:31 PM - Re: RV10 Electrical Issue (w/ Format Clean Up) (Gary Wold)
9. 05:47 PM - Re: Shielding for strobes (Robert L. Nuckolls, III)
10. 05:53 PM - Re: Two charging devices running in parallel? (rparigoris)
11. 05:56 PM - Re: Monarch EE Anti-Plugging Field Accelerating? (rparigoris)
12. 06:40 PM - Tibet and Nepal Travels (ZoeCC)
Message 1
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| Subject: | Re: RV10 Electrical Issue (w/ Format Clean Up) |
>Garmin specs a 100amp 50mV shunt. Certainly if the shunt and efis
>settings don't match you'll get inaccurate readings. 7 amps sounds
>about right to me. Also, I saw the previous comment about fuses in
>the middle of the sense lines. Excess resistance there will also
>affect the readings. Fuses are a good idea but they should be right
>at the shunt. I used pico fuses to avoid issues with a fuse holder.
>\
There is virtually zero current flowing in the sense
leads off a shunt to the display. Fuses and connectors
in these leads do not adversely affect calibration.
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: RV10 Electrical Issue (w/ Format Clean Up) |
On 1/11/2021 7:15 AM, Robert L. Nuckolls, III wrote:
>> Garmin specs a 100amp 50mV shunt. Certainly if the shunt and efis
>> settings don't match you'll get inaccurate readings. 7 amps sounds
>> about right to me. Also, I saw the previous comment about fuses in
>> the middle of the sense lines. Excess resistance there will also
>> affect the readings. Fuses are a good idea but they should be right
>> at the shunt. I used pico fuses to avoid issues with a fuse holder.
>> \
>
> There is virtually zero current flowing in the sense
> leads off a shunt to the display. Fuses and connectors
> in these leads do not adversely affect calibration.
>
>
> Bob . . .
>
But varying resistance does; at least with a Dynon EMS D-10. My plane
has really cheesy inline fuse holders for the little glass instrument
fuses. I was seeing large but inconsistent discharge indications. When I
reached under the panel and pulled on the inline fuse holders, current
readings would return to normal. After a few days or weeks, random high
current readings would show up again, and the cure would be the same.
I didn't attempt to 'instrument' the sense leads to prove the diagnosis,
but as you know, this troubleshooting technique has been pretty
effective since we started thumping vacuum tubes.
Charlie
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Message 3
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| Subject: | Re: Monarch EE Anti-Plugging Field Accelerating? |
>Here's a pic. from 2013 when it was in need of a good going over:
>https://1drv.ms/u/s!Ah1S270Nwg9VtFmAe2PksSsa9K14
Rode hard and put away wet . . .
Got a soft spot in my heart for nice, old and still
functional tools.
One of my prized possessions is a Craftsman table
saw of 1950 vintage. Belonged to my wife's
grandfather. When we did their estate sale
about 20 years ago, nobody would offer what
we thought the saw was worth. My father-
in-law 'willed' it to me.
I put it on a new base with casters. Upgraded
the motor. Added extensions to the table top. Next
enhancement is to facilitate long rips with
rollers added to the down-stream edge of the
extensions.
There's something really satisfying to exploit
the utility of a tool that's nearly as old as
I am!
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 4
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| Subject: | Re: RV10 Electrical Issue (w/ Format Clean Up) |
>With regards to the Z101 option or the Z14 for that matter I am for
>what ever works best for my current situation. I need to be able to
>communicate it to my A and P.
Okay. It sounds like you're amenable to considering an 'upgrade'
Z101 is a project we started here on the List last year. It's a
kind of "legos" approach to configuring a light aircraft electrical
system. As published, it includes everything-AND-the-kitchen-sink.
To utilize this drawing, you delete un-needed features.
Give me a few days. I'll take the base drawing and 'trim' it
to what most closely incorporates what's in your airplane
now . . . Let's see if we can gather up some loose ends in the
current configuration while minimizing the $time$ and $effort$
to incorporate the changes.
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 5
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| Subject: | Ground LC3C controllers |
The wiring diagram indicates ground the #7 pin from the alternator
controllers to the engine block. The firewall side 24 tab ground block is
close by. Is there a reason the controller ground should go to the engine
block rather than the 24 tab ground? Does it matter? (It's all tied
together in my composite.)
Thanks,
Dan
Message 6
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| Subject: | Re: Ground LC3C controllers |
At 03:47 PM 1/11/2021, you wrote:
>The wiring=C2 diagram indicates ground the #7 pin
>from the alternator controllers to the engine
>block.=C2 The firewall side 24 tab ground block
>is close by.=C2 Is there a reason the controller
>ground should go to the engine block rather than
>the 24 tab ground?=C2 Does it matter?=C2 (It's all
>tied together in my composite.)
>
>Thanks,
>Dan
To the FIREWALL GROUND BLOCK . . . NOT ENGINE
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 7
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| Subject: | Shielding for strobes |
A tech that wired my strobes (a composite) used three regular shielded
wires rather than the gray wheelen strobe wire that has a shield around all
three wires. Is there a problem with that?
Message 8
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| Subject: | Re: RV10 Electrical Issue (w/ Format Clean Up) |
Was written...
Hey guys I am way in over my head on this forum but a nice man from BandC
suggested I try. Attached is the electrical diagram of my recently
purchased RV10. It was completed in 2009 and the avionics was switched to a
Garmin 900x a year later. My issue is it safe and operationally sound. It
is an X design, if that is fa
I missed your original post, but I feel the same way about being a newbie.
Cannot understand why aircraft electronics are hard for me. I can wire
125v circuits with my eyes closed. Apprehensive about wiring my EAB
aircraft.
On Sun, Jan 10, 2021 at 8:15 AM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 06:54 AM 1/9/2021, you wrote:
>
> Hey guys I am way in over my head on this forum but a nice man from BandC
> suggested I try. Attached is the electrical diagram of my recently
> purchased RV10. It was completed in 2009 and the avionics was switched to
a
> Garmin 900x a year later. My issue is it safe and operationally sound. I
t
> is an X design, if that is familiar.
>
>
> That's a REALLY busy electrical system . . .
>
>
> Apparently the builder added a bus tie in order to bypass a diode bridge
> rectifier type because the draw to recharge the Aux Battery, 2 wheel chai
r
> batteries 7Ah 12v wired in series reduced the essential bus voltage to
> 12.6v. This bus tie when on,boosts both busses back to 13.6v. Is this how
> it was meant to be run?
>
>
> The thought processes behind this architecture cannot
> be know to us unless it's documented somewhere. The
> system depicted has features that are
>
>
> Additionally with both alternators on, the displayed alternator amperage
> seems to be all over the scale; sometimes 45-50 amps when the airplane ha
s
> most accessories off. Feeding both alternators into a single =C3=A2=82
=AC=C5=93bus bar=C3=A2=82=AC
> seems to cause issues and is that safe?
>
>
> Why run both at the same time?
>
>
> Therefore it's been recommended that I swap out the Stby Alt for a 60A PP
> alternator and just use it as the primary power source. My preference
> would be going to a Z plan where each alternator powers its own bus but
> I've been advised against that. The good news is my A&P figured out the
> shunt had not been changed per Garmin install instructions, a 100A 50
> milivolts currently on order.
>
>
> Aside from the things you've described here has
> this system been flying 'successfully' since 2009?
> Unless the seller offered the equivalent of a pilots
> operating handbook for the system, you're kinda
> stuck with second guessing the builder's original
> design goals.
>
> The builder spent a lot of time providing a good
> drawing of the wiring which is good. But the arrangement
> makes it difficult to sort out exactly how this
> system is supposed to function. Wiring for
> bridge rectifier is curious . . . it shows all
> four terminals tied together which negates its
> function as a diode array.
>
> Changing this system to conform to a Z-figure
> would be a BIG task. What are your plans/expectations
> for getting the airplane flyable?
>
>
> 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 9
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| Subject: | Re: Shielding for strobes |
At 04:43 PM 1/11/2021, you wrote:
>A tech that wired my strobes (a composite) used three regular
>shielded wires rather than the gray wheelen strobe wire thathas a
>shield around all three wires.=C2 Is there a problem with that?
Don't believe so . . .
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 10
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| Subject: | Re: Two charging devices running in parallel? |
Hi Bob I spoke with TJ today, he doesn't know of anyone that has done what I propose
thus far. After he did a bit of noodling, he thought it will probably work
OK. His suggestion was to start with a .2volt spread and could open to .3 or
.4 if needed.
I don't know of anyone who is using a LR3D (or C) and a AVC1 at the same time like
I propose. AVC1 has not been around too long.
I will add this to the list of Interesting Experiments!
Appreciate your opinion as always. Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=500144#500144
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| Subject: | Re: Monarch EE Anti-Plugging Field Accelerating? |
Hi Bob Slick saw! Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=500146#500146
Message 12
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| Subject: | Tibet and Nepal Travels |
Lhasa, the capital and political, economic, and cultural center of the Tibet Autonomous
Region. It is located in the middle of the Qinghai-Tibet Plateau and
southeast of the Tibet Autonomous Region. With an altitude of 3650 meters above
sea level, Lhasa is one of the highest cities in the world and also known as
the "Sunlight City". Lhasa is the first impression of a Tibet tour for most travelers.
Tibet Lhasa Map (https://www.greattibettour.com/lhasa-travel-tips/map.html)
Lhasa stands on the north bank of the Lhasa River which is a tributary of the Yarlung
Zangbo River. The city spans 277 kilometers from east to west and 202 kilometers
from north to south, with a total area of 29,518 square kilometers.
Tibet is composed of one city and six prefectures. Lhasa is encompassed by Nagqu
in the north, Lhoka in the south, Shigatse in the west, and Nyingchi in the
east. Beyond that, there are Ngari and Chamdo which are not connected to Lhasa.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=500147#500147
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