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ssamps(at)gmail.com
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 Posted: Tue Sep 25, 2007 1:50 pm Post subject: P-mag Wiring |
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Michael, what I think I have proposed is the best of both worlds. I will only have one switch per P-mag in what I described, but it will operate functionally as E-mag intend. (The 2-50 allows me to do this instead of using e-mag's 2 switches.) My intended wiring is pretty much what E-mag require. I have just collapse the two switches into one if you look at it carefully.
What I wrote when I started this was "I plan to tuck them in under the panel, its a -4, where nothing will fall down on them, but well in line of sight.. " So what i am trying to say is protected, but NOT hidden. I cant get overly concerned about switch position. Normally, for the last 50 years or so, you turn both mags on and just leave them like that without lights etc to tell you.
Yes, I was puzzled by the colours .v. numbers.
Wiring to the battery bus? Isnt that what e-mag required. Perhaps I am not understanding Bob's terminology.
Steve.
On 25/09/2007, Michael T. Ice <aurbo(at)ak.net (aurbo(at)ak.net)> wrote: [quote] Steve,
Your idea seems good to me. But I wonder why do you want to use the 2-50 switch? Why not just wire the mags the way the Emagair folks suggest?
One thing I like about the AeroElectric idea is the concept of reducing "parts count". More parts equals more possible trouble. But in this instance either system uses at least 2 switches for each P-mag, so it is a wash.
I understand the need for the switch to shut off the power to the P-mag so you can check the internal alternator but why hide them? If you hide them will you need a warning light to tell you they are in one position or another? I have been thinking I might use a toggle switch with an LED light in the end of it.
The AeroElectric z-33 figure shows the 2-10 switch being hooked up to P-mags using wire colors. I think that it would be better if the connector plug was numbered on those drawings. The E/P mags don't have colored wires on them.
I agree, we should hope that Bob and Emag can get together and come up with a one size fits all, with a reduced parts count, and doesn't cause damage to the P-mags with and accidental push or flick of a switch.
I propose until this situation is sorted out by us, that those of us installing and flying behind these E/P mags follow the manufacturers wiring diagrams.
I do like Bob's suggestion to wire the mags to the battery bus.
Mike
[quote] ---
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ssamps(at)gmail.com
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| Posted: Tue Sep 25, 2007 1:57 pm Post subject: P-mag Wiring |
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Bob, thanks for getting involved. In the meantime can you comment on the second bit of my email regarding a 2-50 switch, since it is germain to this:
" The one important assumption I am making with my proposal, is that as you move from the bottom to the midle position, the power cant 'flutter' for an instant, and the P-lead connected, BEFORE the power connection is remade. I presume with these switches the connection is not lost, however briefly? Bob, if you are reading this can you confirm my understanding of how the contacts move in these switvches? "
Thanks, Steve.
On 25/09/2007, Robert L. Nuckolls, III <nuckolls.bob(at)cox.net (nuckolls.bob(at)cox.net)> wrote: [quote]--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" < nuckolls.bob(at)cox.net (nuckolls.bob(at)cox.net)>
At 08:27 AM 9/25/2007 +0100, you wrote:
| Quote: | Dave, It is very simple, except Bob's proposed wiring, abuses one
preference "by the good folk at EW-magair". E-mag's preference is that the
mag is always powered (presumably the firmware initialised) BEFORE the
P-lead is opened. They presumably have knowledge of how they wrote the
code and the reason why they say this.
Bob on the other hand has never explained, to my very limited knowledge,
how he can ignore this preference, and how it interacts with the code
initialisation.. Bob?
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I've crafted a note to Brad Demet with a goal
of repairing a demonstrable disconnect in my understanding
of e-Mag's functionality. I've posted a copy of my
note to the list.
Sorry to take so long to climb back into this particular
'stew pot' . . . I've had too much stuff piled onto my
[b]
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nuckolls.bob(at)cox.net
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| Posted: Wed Sep 26, 2007 4:52 am Post subject: P-mag Wiring |
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At 10:55 PM 9/25/2007 +0100, you wrote:
| Quote: | Bob, thanks for getting involved. In the meantime can you comment on the
second bit of my email regarding a 2-50 switch, since it is germain to this:
" The one important assumption I am making with my proposal, is that as
you move from the bottom to the midle position, the power cant 'flutter'
for an instant, and the P-lead connected, BEFORE the power connection is
remade. I presume with these switches the connection is not lost, however
briefly? Bob, if you are reading this can you confirm my understanding of
how the contacts move in these switvches? "
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First, the system should not be vulnerable to momentary
perturbations on the bus and yes, the progressive transfer
switches once made do not display discontinuities while the
other side changes states.
Bob . . .
----------------------------------------
( "Problems are the price of progress. )
( Don't bring me anything but trouble. )
( Good news weakens me." )
( -Charles F. Kettering- )
----------------------------------------
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ssamps(at)gmail.com
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| Posted: Wed Sep 26, 2007 9:04 am Post subject: P-mag Wiring |
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Bob, thanks that's great. Steve.
On 26/09/2007, Robert L. Nuckolls, III <nuckolls.bob(at)cox.net (nuckolls.bob(at)cox.net)> wrote: [quote]--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" < nuckolls.bob(at)cox.net (nuckolls.bob(at)cox.net)>
At 10:55 PM 9/25/2007 +0100, you wrote:
| Quote: | Bob, thanks for getting involved. In the meantime can you comment on the
second bit of my email regarding a 2-50 switch, since it is germain to this:
" The one important assumption I am making with my proposal, is that as
you move from the bottom to the midle position, the power cant 'flutter'
for an instant, and the P-lead connected, BEFORE the power connection is
remade. I presume with these switches the connection is not lost, however
briefly? Bob, if you are reading this can you confirm my understanding of
how the contacts move in these switvches? "
|
First, the system should not be vulnerable to momentary
perturbations on the bus and yes, the progressive transfer
switches once made do not display discontinuities while the
other side changes states.
Bob . . .
----------------------------------------
( "Problems are the price of progress. )
( Don't bring me anything but trouble. )
( Good news weakens me." )
[b]
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