Today's Message Index:
----------------------
1. 05:38 AM - Physical construction of Z101 engine bus & battery bus (David Carter)
2. 06:54 AM - Re: Physical construction of Z101 engine bus & battery bus (Ken Ryan)
3. 07:23 AM - Re: Physical construction of Z101 engine bus & battery bus (bcone1381)
4. 07:55 AM - Re: Physical construction of Z101 engine bus & battery bus (Robert L. Nuckolls, III)
5. 08:34 AM - Re: Physical construction of Z101 engine bus & battery bus (Charlie England)
6. 09:40 AM - Re: Connector Shells (Stein Bruch)
7. 02:58 PM - Essential Bus Diode Voltage D-25 voltage drop of 2.3V? (plevyakh)
8. 04:59 PM - Re: Essential Bus Diode Voltage D-25 voltage drop of 2.3V? (user9253)
9. 06:01 PM - Re: Physical construction of Z101 engine bus & battery bus (user9253)
10. 07:16 PM - Harbinger of summer . . . a yearly shop ritual (Robert L. Nuckolls, III)
11. 07:20 PM - Re: Essential Bus Diode Voltage D-25 voltage drop of 2.3V? (Robert L. Nuckolls, III)
Message 1
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| Subject: | Physical construction of Z101 engine bus & battery |
bus
Bob,
I see that both of these busses are specified with 6" max feeds from their
sources (main contactor and diode bridge). What is the recommended
physical realization of these bus designs? Fuse blocks on the engine side
of the firewall? Inline fuses? Are the loads intended to be fused,
breakered, or a mix? Similarly, what is the suggested construction of the
"fat wire tie point?"
In my case, I believe everything on the engine bus will be on the cabin
side of the firewall - an AFP fuel pump & two SDS CPI-2 ignition control
units. I could perhaps put a pair of 6" 12 AWG wires through the firewall
at the contactor & mount a fuse block on the cabin side at that point.
The battery bus may be only a single connection to the aux alternator, or I
may find that I need a clock feed. If it's just a single feed, the bus
construction doesn't get any simpler. BTW, I just noticed there are two
feeds on the battery bus labeled "aux alt".
Also, I note that the alt feed from the relay to the engine bus is not
asterisked as a short run. I think practically it will be, but I wonder if
there is a reason it's not asterisked?
Thanks!
---
David Carter
david@carter.net
Message 2
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| Subject: | Re: Physical construction of Z101 engine bus & battery |
bus
Could someone please re-post the link to Z101? Thanks.
On Sat, Jun 6, 2020 at 4:43 AM David Carter <david@carter.net> wrote:
> Bob,
>
> I see that both of these busses are specified with 6" max feeds from their
> sources (main contactor and diode bridge). What is the recommended
> physical realization of these bus designs? Fuse blocks on the engine side
> of the firewall? Inline fuses? Are the loads intended to be fused,
> breakered, or a mix? Similarly, what is the suggested construction of the
> "fat wire tie point?"
>
> In my case, I believe everything on the engine bus will be on the cabin
> side of the firewall - an AFP fuel pump & two SDS CPI-2 ignition control
> units. I could perhaps put a pair of 6" 12 AWG wires through the firewall
> at the contactor & mount a fuse block on the cabin side at that point.
>
> The battery bus may be only a single connection to the aux alternator, or
> I may find that I need a clock feed. If it's just a single feed, the bus
> construction doesn't get any simpler. BTW, I just noticed there are two
> feeds on the battery bus labeled "aux alt".
>
> Also, I note that the alt feed from the relay to the engine bus is not
> asterisked as a short run. I think practically it will be, but I wonder if
> there is a reason it's not asterisked?
>
> Thanks!
>
> ---
> David Carter
> david@carter.net
>
Message 3
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| Subject: | Re: Physical construction of Z101 engine bus & battery |
bus
https://tinyurl.com/yavoutjh
--------
Brooks Cone
Bearhawk Patrol Kit Build
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496645#496645
Message 4
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| Subject: | Re: Physical construction of Z101 engine bus & battery |
bus
At 08:50 AM 6/6/2020, you wrote:
>Could someone please re-post the link to Z101? Thanks.
https://tinyurl.com/yc4r5huy
Latest iteration on the next revision level.
I've been sifting through the details and
I think it's 99% 'clean'.
I'm also working on a set of notes that
elaborates on the evolution of concepts
illustrated.
I'm kinda 'distracted' with a bathroom
remodel at the moment but you guys can
massage this thread . . .
Bob . . .
Message 5
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| Subject: | Re: Physical construction of Z101 engine bus & battery |
bus
On 6/6/2020 7:36 AM, David Carter wrote:
> Bob,
>
> I see that both of these busses are specified with 6" max feeds from
> their sources (main contactor and diode bridge). What is the
> recommended physicalrealization of these bus designs? Fuse blocks on
> the engine side of the firewall? Inline fuses? Are the loads intended
> to be fused, breakered, or a mix? Similarly, what is the suggested
> construction of the "fat wire tie point?"
>
> In my case, I believe everythingon the engine bus will be on the
> cabin side of the firewall - an AFP fuel pump & two SDS CPI-2 ignition
> control units. I could perhaps put a pair of 6" 12 AWG wires through
> the firewall at the contactor & mount a fuse block on the cabin side
> at that point.
>
> The battery bus may be only a single connection to the aux alternator,
> or I may find that I need a clock feed. If it's just a single feed,
> the bus construction doesn't get any simpler. BTW, I just noticed
> there are two feeds on the battery bus labeled "aux alt".
>
> Also, I note that the alt feed from the relay to the engine bus is not
> asterisked as a short run. I think practically it will be, but I
> wonder if there is a reason it's not asterisked?
>
> Thanks!
>
> ---
> David Carter
> david@carter.net <mailto:david@carter.net>
I think that the two feeds to the bat bus are actually the alt output,
and the feed (control) to the alt's regulator. Look at the connections
to the regulator, at the bottom of the drawing.
I think that the feed from the alt feed relay to the engine bus is
'protected' by the relay.
Charlie
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Message 6
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| Subject: | Connector Shells |
WellIt=99s hardly a singular Garmin issue, as they are the s
ame on Avidyne,
(as well as Bendix King, Narco, L3, PSE, etc..) so if you are all about
avoiding using a long screwdriver to remove the backplate and/or connectors
you=99re not left with much choice of avionics.
The newer generation stuff is much better, but much of the older generation
stuff is a pain (regardless of brand).
Cheers,
Stein
*From:* owner-aeroelectric-list-server@matronics.com <
owner-aeroelectric-list-server@matronics.com> *On Behalf Of *Charlie Englan
d
*Sent:* Friday, June 5, 2020 6:43 PM
*To:* aeroelectric-list@matronics.com
*Subject:* Re: AeroElectric-List: Connector Shells
The 430 has both std & hi density connectors. the stock backshells are
apparently available from only one or two sources. Here's an ebay listing
with a pretty good pic:
https://www.ebay.com/itm/GNS430-GNS430W-GNS530-GNS530W-Connector-Kits-011-0
0351-00-/143440923345?_trksid=p2385738.m4383.l4275.c10
In my not so humble opinion, the backplane/connector arrangement is almost
enough reason, by itself, to avoid Garmin. A real nightmare dealing with
the tiny screws using a foot long screwdriver reaching into the back of the
tray...
Charlie
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_c
ampaign=sig-email&utm_content=emailclient&utm_term=icon>
Virus-free. www.avast.com
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Message 7
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| Subject: | Essential Bus Diode Voltage D-25 voltage drop of 2.3V? |
Guys,
I'm using the standard AeroElectric Z-13/8 design with the E-Bus. I have Lighspeed
dual electronic ignitions with 1 powered by main batt, and 2nd powered by
the E-Bus.
I've noticed a signficant voltage drop from my Main Bus (@ 14.3V), through the
diode (D-25) and to my E-Bus (@12.0V).
I was expecting .5 to .7V drop across the D-25, but can't find a spec sheet for
the Vf curve.
It became evident when my Low Volts warning started complaining.
What should I check to track down this increase in voltage drop?
Should I just swap in another D-25? I've been flying for 350hrs.
Is there another diode of choice now of a Diode I can use to swap in its place?
Where can I purchase the AEC9001 Schottky Power Diode if that's a better option.
Thanks!
Howard
GlaStar
--------
Howard Plevyak
GlaStar / Cincinnati, Ohio
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496651#496651
Message 8
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| Subject: | Re: Essential Bus Diode Voltage D-25 voltage drop of |
2.3V?
If the diode voltage drop has been low for 350 hours, but recently increased,
the check for a bad connection between the main power bus and the E-Bus.
Schottky Diode part number: 747-DSS2X61-0045A
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496652#496652
Message 9
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| Subject: | Re: Physical construction of Z101 engine bus & battery |
bus
Since bob gave permission to others to answer, here are my suggestions:
Mount both relays as close as practical to the battery.
Doing that meets the 6" wire length rule of thumb.
Since you want the engine bus located on the cabin side of the firewall, also
move the diode bridge to aft of the firewall between the main power bus and the
engine bus.
Move the diode feed from the main battery contactor to main power bus. Electrically
it will be the
same, just connected to the other end of the 6AWG feeder.
Since there are only 2 items connected to the battery bus, consider eliminating
the battery bus.
Connect both items to the battery post using inline fuses.
Use all fuses except for the alternator feed 5 amp breaker.
Fuses cost less, weigh less, and never fail to blow when required.
Never replace fuses or reset breakers in flight, except perhaps the alternator
field.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496653#496653
Message 10
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| Subject: | Harbinger of summer . . . a yearly shop ritual |
Just got the air conditioners up and running in the
shop. I've been practicing an exceedingly practical
ritual that Listers may find useful:
https://tinyurl.com/yawlgvnr
Bob . . .
Message 11
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| Subject: | Re: Essential Bus Diode Voltage D-25 voltage drop |
of 2.3V?
>
>What should I check to track down this increase in voltage drop?
Get your voltmeter out, ground the (-) lead and then
probe the pathway from main bus through the diode
to the e-bus.
I've never seen a diode fail in such a manner. You
could swap a new one in temporarily as part of the
investigation but I don't think your going to find
that to be root cause.
>Should I just swap in another D-25? I've been flying for 350hrs.
>
>Is there another diode of choice now of a Diode I can use to swap in
>its place? Where can I purchase the AEC9001 Schottky Power Diode if
>that's a better option.
Pull the fast-ons off the old diode and push them
onto a new diode without mounting it to get a quick
voltage check. You're going to have to crawl around
under there to get at the pathway joints anyhow.
Return on investment for 'going Schottky' is limited.
Bob . . .
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