Today's Message Index:
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1. 02:16 AM - Re: MGL Avionics (Peter Pengilly)
2. 05:41 AM - Air Jordan 1 x Nike SB Purple Gold Toe Coming Soon (blair2019)
3. 09:20 AM - Re: Opinions of electrical layout please (user9253)
4. 12:15 PM - Re: MGL Avionics (Ernest Christley)
5. 02:12 PM - Re: Re: Opinions of electrical layout please (Robert L. Nuckolls, III)
6. 05:21 PM - ENDURANCE BUS ALTERNATIVE (user9253)
Message 1
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I'm not a great fan. They are less expensive than many other vendors, but the installation
is often more challenging.
It depends on your experience, intended use and budget.
Users have access to much of the code, particularly the display configuration,
which is good and bad.
The owner can make the display what he wants, but many smart people have spend
many, many hours defining standards for aircraft displays - why should you be
able to do better than them?
Trig radios are better.
Peter
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com <owner-aeroelectric-list-server@matronics.com>
On Behalf Of David and Elaine Lamphere
Sent: 22 February 2019 02:39
Subject: AeroElectric-List: MGL Avionics
--> <dalamphere@comcast.net>
Looking for anyones experience with any of the MGL avionics units.
The remote mounted V16 com radio with the Razor controller looks interesting.
Any comments or advice concerning these products? Would you put them in a new plane?
Dave
Message 2
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| Subject: | Air Jordan 1 x Nike SB Purple Gold Toe Coming Soon |
The purple lobster, small diamonds and panda pigeons have been released, which makes the classic shoes SB Dunk in the Nike camp return to the sight of the sneakers. The Nike SB series derived from Air Jordan 1 has been used in the previous two series. There have been many cooperations. For example, the previous Air Jordan 1 x Nike SB (https://www.2019sneakersrelease.com/product-category/air-jordan-sneakers/air-jordan-1/) series not only follows the excellent shoes of the Air Jordan 1 series, but also inherits the outstanding color design of the Nike SB. Recently, a new color matching Air Jordan 1 x Nike SB shoe has been re-exposed. This pair of shoes was first put on the Nike SB team rider Theotis Beasley, coloring the logo for the Lakers. The upper is like a classic OG toe collection, and the yellow Swoosh Logo echoes the upper. The upper foot also has a little discoloration effect, and the overall texture is very outstanding. The low-cut co-branded version looks like the previously-sold slag ash color scheme, and the classic black-gray with low-cut shoes gives a different first-year experience.
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Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487789#487789
Message 3
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| Subject: | Re: Opinions of electrical layout please |
Attached is a way to minimize the length of hot wires when switches are shut off.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487792#487792
Attachments:
http://forums.matronics.com//files/av8rrob_352.jpg
Message 4
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| Subject: | Re: MGL Avionics |
On Sunday, February 24, 2019, 5:17:28 AM EST, Peter Pengilly <Peter@spo
rtingaero.com> wrote:
ero.com>
Users have access to much of the code, particularly the display configurati
on, which is good and bad.
The owner can make the display what he wants, but many smart people have sp
end many, many hours defining standards for aircraft displays - why should
you be able to do better than them?
I don't mean to start a week long thread, but this is a legitimate question
that is often asked, and it has a very good answer that applies to a large
r set of problems.A user can do better than the professionals, because the
user has to worry about exactly ONE airplane.=C2- The "smart people", pro
fessionals, have to worry about a great many airplanes that are flown in a
wide range of scenarios.=C2- I'm a software engineer, and I spend half of
my design time trying to constrain the scope.=C2- I'm constantly explain
ing to my workmates that taking on one more requirement increases the compl
exity exponentially.=C2- A user can design a better interface, because he
is dealing with a smaller problem space.
=C2-Doesn't mean she will.=C2- It means she can.
Also, , generally the user isn't needing to make a living off of the result
s.
Message 5
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| Subject: | Re: Opinions of electrical layout please |
>
>If the avionics switch fails, then the only loss is some
>non-essential avionics.
>I like the availability to load shed.
Have you conducted a Failure Mode Effects
Analysis in concert with a Load Analysis?
Under what operating condition + failure
will you need to load-shed? You have a
25A standby alternator that should carry
lots of electro-whizzies. It may well
be that the load-shedding protocols are
little more complicated that opening
the avionics switch.
Dropping a couple of 'big' loads
as part of the Plan-B protocol
seems far more practical than
driving up complexity with the
switch/diode array you've illustrated.
> I guess if i was stranded with a broken switch I
> could just had wire the avionics bus to the main
> bus to get home.
It may well be that the avionics switch
is and un-necessary antagonist to
risk of failure.
>Excuse my ignorance but Im not aware of leakage
>current of a switched off alternator, can you
>explain further?
Not a concern . . . there are tens of
millions of alternators hard-wired to
the battery of cars with no deleterious
effect. "Leakage" back through the alternator
diodes is vanishingly small.
>The IBBS battery will charge as long as the master
>battery is switched on which will allow the main bus
>to be powered by the alt, followed by the standby alt,
>followed by the main battery. Yes, if there is smoke, both master
>and backup switches will be turned off. This will leave the ignition
>running off its own dedicated battery (1 hr) and the G5 running off
>its own battery. I cant speak about earth x batteries issues (still
>need to talk to them). Just call it a battery for now. That was my
>attempt at a current shunt in series with the alt.
Let's do the math and FMEA first. What
gizmos are least likely to be useful
during a main alternator failure?
What is the configuration of your
ignition system? Why a separate
battery?
Bob . . .
Message 6
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| Subject: | ENDURANCE BUS ALTERNATIVE |
If the main purpose of the Endurance Bus is to reduce pilot workload in case the
alternator fails, then there is an alternative solution. Arrange the switches
in
order of importance and color code them. When the alternator fails, the pilot
finishes his coffee, then starts shutting off switches on the far right and
works his way to the left. Several switches could be shut off with one motion
of the hand. A physical barrier or open space could separate essential
switches from non-essential ones. The advantage of this architecture is a
simplified electrical system, only one bus, no diodes, and yes, even reduced
pilot workload. She will not have to remember which loads are connected to
which bus. Some loads could be essential or not depending on the flight
conditions. Just turn them on or off as needed.
_ What about the backup-electrical-current path that the E-Bus relay
provides? No problem, just install a 40 amp automotive relay (disabled
during starting) in parallel with the battery contactor. The master switch
would have 3 positions: down-off, center-relay, up-contactor.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=487800#487800
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