Today's Message Index:
----------------------
0. 12:21 AM - Please Make A Contribution To Support Your Lists (Matt Dralle)
1. 05:43 AM - Solder as a structural material (Robert L. Nuckolls, III)
2. 12:10 PM - Choosing Z-Diagram base ()
3. 03:22 PM - Re: Choosing Z-Diagram base (Bradley Webb)
4. 06:29 PM - Squeal PTT (Allan Aaron)
5. 07:09 PM - (Robert L. Nuckolls, III)
6. 07:14 PM - Re: Choosing Z-Diagram base (Robert L. Nuckolls, III)
7. 07:22 PM - Re: Squeal PTT (Paul McAllister)
8. 07:46 PM - Z19RB Fat wire protection, etc. (Allen Fulmer)
9. 08:16 PM - Re: Squeal PTT (Allan Aaron)
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| Subject: | Please Make A Contribution To Support Your Lists |
Dear Listers,
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Matronics Email List and Forum Administrator
Message 1
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| Subject: | Solder as a structural material |
At 02:51 PM 11/11/2008 -0800, you wrote:
>
>Hi Bob,
>
>Those are pretty slick, smooth corners on that weeder box!
>How any hours of sanding and filling the glass?
>
>(just kidding, I see the solder)
That's a really handy technique for either crafting
an enclosure that you need in a hurry . . . or some
odd sized enclosure that is not available as a catalog
item. About 30 years ago I wanted to build two transformers
for h.v. power supplies that needed to look like they came
from a factory. Our wire winding folks gave me a
core with a rat's nest of wires hanging off it. I built
a 5 sided potting form from .032 copper clad and solder,
brought the wire leads to turret terminals out the top,
built a fixture to hold threaded spacers in position
at the bottom opening while the potting compound set up.
After a few shots of paint, the end product came out
just like the boss ordered. We had an ECB shop so the
copper clad was on hand in a variety of thicknesses.
I sill keep sheets of it around in spite of the fact
that I'll never make another ECB myself!
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 2
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| Subject: | Choosing Z-Diagram base |
I am building a system which will contain a Lycoming 360 with dual
electronic ignition and one alternator.
I have looked at Z-12, Z-19 and Z-28 as an addendum.
Which one or combination of these diagrams would support a good
solution? I read somewhere in the pages that dual electronic ignition
would best be served by two batteries.
Thanks,
Glenn
Message 3
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| Subject: | Choosing Z-Diagram base |
Good evening John,
I will try to contribute something back to the list, as it has given me so
much in the last months of my build.
First question: has the engine become electrically dependent based on the
electronic ignition?
Second question: Do you physically have room to mount 2 batteries of decent
capacity in your airframe? Will your CG support such an install?
Third question: What are your general, overall goals for the electrics? I
think we all come to similar conclusions here, but...
What kind of loads are you expecting in your airplane? Maybe catalog a list
of the installed equipment. This won't necessarily change your diagram, but
it will determine the size of battery that a) will fit in the frame, and b)
is available in the market.
I studied Z-19RB quite a bit, and ended up not using it for various reasons.
That does not nullify it's validity in any way; it just didn't work for me.
I designed a simple system that provides for an acceptable safety margin,
with known risks, AND a plan for that inevitable failure. This, in and of
itself, was the golden nugget that AEC provided. It's made me think!
Don't forget, Bob's diagrams are only examples of what can be done. You can
mix and match as your needs are met. I did just that. I'm a fan of
simplicity, but others like their gadgets. Each approach has its virtues, so
you need to design around what you're comfortable with. Think about failure
modes, and how you'll deal with them when there's no more altitude,
airspeed, or ideas left.
To be continued...
Bradley
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
longg@pjm.com
Sent: Wednesday, November 12, 2008 3:07 PM
Subject: AeroElectric-List: Choosing Z-Diagram base
I am building a system which will contain a Lycoming 360 with dual
electronic ignition and one alternator.
I have looked at Z-12, Z-19 and Z-28 as an addendum.
Which one or combination of these diagrams would support a good
solution? I read somewhere in the pages that dual electronic ignition
would best be served by two batteries.
Thanks,
Glenn
Message 4
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I have a Flightcom 403 intercom and an Apollo 40 transceiver in my 2
place plane. Until yesterday, I hadn't installed the co-pilot ptt and
the radio and intercom has worked fine. Yesterday I hooked up the
co-pilot ptt and now when I try to transmit (as pilot) and press the ptt
I get a high pitch squeal in the headsets. When the co-pilot transmits,
that squeal is not present. Intercom and radio reception are fine unless
I press the pilot ptt. Is there something obvious that I've done wrong?
Where would I start to try to trace the problem? Thank you. Allan
Message 5
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David W Kingrey
2154 S Milstead St
Wichita, KS 67209-3605
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 6
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| Subject: | Re: Choosing Z-Diagram base |
At 03:07 PM 11/12/2008 -0500, you wrote:
>
>I am building a system which will contain a Lycoming 360 with dual
>electronic ignition and one alternator.
>
>I have looked at Z-12, Z-19 and Z-28 as an addendum.
>
>Which one or combination of these diagrams would support a good
>solution? I read somewhere in the pages that dual electronic ignition
>would best be served by two batteries.
. . . that statement is pretty old . . . when folks
were still installing a lot of vacuum pumps. Do you
plan a vacuum system or all electric?
If all electric, have you done a load analysis to
see how much power you need for comfortable completion
of flight with the main alternator out? You mentioned
Z-12 but consider also, Z-13/8. This is an exceedingly
light and inexpensive way to make sure you have electrons
to keep an engine running. I suspect you can trim an
e-bus load down to 8A or less. Keep in mind too that
you don't need to run both electronic ignitions all
the time. During alternator-out operations, you can
drop to one ignition with very little loss of performance
which still holds a second system in reserve.
Bob . . .
Message 7
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Hi Allan,
Would your headsets happen to be ANR. I had a similar issue with my old LightSpeed
25XL's, but conventional headsets worked fine.
Paul
________________________________
From: Allan Aaron <aaaron@tvp.com.au>
Sent: Wednesday, November 12, 2008 8:27:09 PM
Subject: AeroElectric-List: Squeal PTT
I have a Flightcom
403 intercom and an Apollo 40 transceiver in my 2 place plane. Until yesterday,
I hadn't installed the co-pilot ptt and the radio and intercom has worked fine.
Yesterday I hooked up the co-pilot ptt and now when I try to transmit (as pilot)
and press the ptt I get a high pitch squeal in the headsets. When the co-pilot
transmits, that squeal is not present. Intercom and radio reception are
fine unless I press the pilot ptt. Is there something obvious that I've
done wrong? Where would I start to try to trace the problem? Thank you.
Allan
Message 8
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| Subject: | Z19RB Fat wire protection, etc. |
Okay Bob,
Airplane and configuration:
RV7 w/Eggenfellner Subaru H6 up front.
2 PC625 batteries in the very back of fuselage wired per Z19RB.
Fat wire (#4 CCA from Eric Jones) runs from battery contactors to a firewall
"pass thru stud" (West Marine). Firewall side of the stud has 2 connectors:
one to an ANL on the way to a 75A IR alternator (supplied with engine
package); another to the starter solenoid mounted as part of geared starter.
I think this is all in accordance with Z19RB architecture.
My question concerns the cockpit side of this "pass through stud". Could
you please reassure me that I am correct in planning a #6 wire from that
same stud (as the fat wire is connected to) to the MAIN POWER DISTRIBUTION
BUS (approximately 42 inches "as the wire goes") withOUT any fuse/breaker
protection?
Your picture:
http://www.aeroelectric.com/Pictures/Wiring_Technique/A36_Firewall_B.jpg
(cert. plane of course) shows a bunch of ANL's to avionics, etc., but in the
OBAM world I guess we do not need to imitate that kind of installation?
And could you also point me to the reference in AEC that speaks to the lack
of a need for ANL protection of the fat wire at the batteries? I think I
have read that ANL's are not needed by the batteries but can not remember
where I read that.
Thanks for all you do, Bob.
Allen Fulmer
RV7 Wiring/Plumbing
Eggenfellner Subaru E6Ti on firewall
N808AF reserved
Alexander City, AL
256-329-2001
Message 9
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Yes - my pilot headset is a Lightspeed. I didn't try a passive one -
but will do that on the weekend. Did you solve the problem or are you
just using conventional headsets now?
Allan
________________________________
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Paul
McAllister
Sent: Thursday, 13 November 2008 2:22 PM
Subject: Re: AeroElectric-List: Squeal PTT
Hi Allan,
Would your headsets happen to be ANR. I had a similar issue with my old
LightSpeed 25XL's, but conventional headsets worked fine.
Paul
________________________________
From: Allan Aaron <aaaron@tvp.com.au>
Sent: Wednesday, November 12, 2008 8:27:09 PM
Subject: AeroElectric-List: Squeal PTT
I have a Flightcom 403 intercom and an Apollo 40 transceiver in my 2
place plane. Until yesterday, I hadn't installed the co-pilot ptt and
the radio and intercom has worked fine. Yesterday I hooked up the
co-pilot ptt and now when I try to transmit (as pilot) and press the ptt
I get a high pitch squeal in the headsets. When the co-pilot transmits,
that squeal is not present. Intercom and radio reception are fine unless
I press the pilot ptt. Is there something obvious that I've done wrong?
Where would I start to try to trace the problem? Thank you. Allan
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