Today's Message Index:
----------------------
1. 03:49 AM - Re: Z-1 Magneto Wiring Question (racerjerry)
2. 05:38 AM - Re: Z-1 Magneto Wiring Question (Charlie England)
3. 06:01 AM - Re: Z-1 Magneto Wiring Question (Harley Dixon)
4. 06:20 AM - Re: Z-1 Magneto Wiring Question (Jared Yates)
5. 06:35 AM - Re: Z-1 Magneto Wiring Question (Rob Turk)
6. 07:19 AM - Re: Z-1 Magneto Wiring Question (Charlie England)
7. 08:06 AM - Re: Z-1 Magneto Wiring Question (user9253)
8. 10:08 AM - Re: Re: Z-1 Magneto Wiring Question (mike)
Message 1
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| Subject: | Re: Z-1 Magneto Wiring Question |
Having some fear about hot mags can be a healthy thing... BUT.
Connecting electronic CRAP to the P-lead can easily lead to an in-flight power
failure with accompanying forced landing; which is much more dangerous than a
hot mag. DON'T DO IT.
I don't know what type of voltages/pulses appear at the magneto P-lead when the
mag is operating or whether it is possible to rig some sort of indicator; but
even if you should be successful, a component failure could easily ground out
your magneto in flight.
I share your concern about hot mags and resolve my problem by using a shutdown
checklist (key out + ign sw off) AND by TOUCHING the P-leads with my finger every
time the upper cowl is removed. Touching helps me remember that I looked
for an intact connection. Occasionally, shut the engine down at idle by moving
the ignition switch to off. This will verify integrity of all wiring and
the switch.
--------
Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453411#453411
Message 2
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| Subject: | Re: Z-1 Magneto Wiring Question |
On Fri, Mar 4, 2016 at 12:04 AM, mike <mike@vision499.com> wrote:
> I am wiring my magneto's according to the set-up in the Z-1 diagram.
>
> I have a phobia about leaving the magneto's on and would like to have some
> type of sensor to indicate whether the magneto's are on by either a
> flashing warning light or buzzer but cannot see how to wire it into the
> set-up as detailed on Z-1
>
> All ideas welcome
>
> Thanks
>
> Mike
>
>
If you use toggles instead of the high $ key switch, you could just use a
multipole switch. A DPDT switch for each mag would allow mag control on one
set of terminals and an indicator on the other. Mags 'on' would be on the
open pair of terminals and the indicator would be driven through the pair
that's closed. Flipping the switch to Mags 'off' would close the mags
terminals and open the indicator control. But... you then need a way to
make the indicator circuit 'hot' only when the master is off. You can do
that with a small relay that's normally closed (meaning that Master ON
would drive the relay contacts open). Lots of monkey motion, but doable if
that's what floats your boat. :-)
Charlie
Message 3
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| Subject: | Re: Z-1 Magneto Wiring Question |
Actually, Mike...with a DPDT switch, the two poles could be wired so
when they are both closed at the same time...one would ground the
P-lead, and the other would connect the indicator to power to turn it
on...The mag would be grounded and off, and the indicator would be on,
indicating "Mag Off".
Harley
------------------------------------------------------------------------
On 3/4/2016 5:33 AM, Charlie England wrote:
>
>
> On Fri, Mar 4, 2016 at 12:04 AM, mike <mike@vision499.com
> <mailto:mike@vision499.com>> wrote:
>
> I am wiring my magneto's according to the set-up in the Z-1 diagram.
> I have a phobia about leaving the magneto's on and would like to
> have some type of sensor to indicate whether the magneto's are on
> by either a flashing warning light or buzzer but cannot see how to
> wire it into the set-up as detailed on Z-1
> All ideas welcome
> Thanks
> Mike
>
> If you use toggles instead of the high $ key switch, you could just
> use a multipole switch. A DPDT switch for each mag would allow mag
> control on one set of terminals and an indicator on the other. Mags
> 'on' would be on the open pair of terminals and the indicator would be
> driven through the pair that's closed. Flipping the switch to Mags
> 'off' would close the mags terminals and open the indicator control.
> But... you then need a way to make the indicator circuit 'hot' only
> when the master is off. You can do that with a small relay that's
> normally closed (meaning that Master ON would drive the relay contacts
> open). Lots of monkey motion, but doable if that's what floats your
> boat. :-)
>
> Charlie
Message 4
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| Subject: | Re: Z-1 Magneto Wiring Question |
It seems like both of these DPDT solutions are providing an indication not
exactly of "Mag off" but rather "Mag switch off." This would be in
addition to the already-provided visual indication of the switch handle
being in the down position.
On Fri, Mar 4, 2016 at 11:59 AM, Harley Dixon <harley@agelesswings.com>
wrote:
> Actually, Mike...with a DPDT switch, the two poles could be wired so when
> they are both closed at the same time...one would ground the P-lead, and
> the other would connect the indicator to power to turn it on...The mag
> would be grounded and off, and the indicator would be on, indicating "Mag
> Off".
>
> Harley
> ------------------------------
> On 3/4/2016 5:33 AM, Charlie England wrote:
>
>
> On Fri, Mar 4, 2016 at 12:04 AM, mike <mike@vision499.com> wrote:
>
>> I am wiring my magneto's according to the set-up in the Z-1 diagram.
>>
>> I have a phobia about leaving the magneto's on and would like to have
>> some type of sensor to indicate whether the magneto's are on by either a
>> flashing warning light or buzzer but cannot see how to wire it into the
>> set-up as detailed on Z-1
>>
>> All ideas welcome
>>
>> Thanks
>>
>> Mike
>>
>>
> If you use toggles instead of the high $ key switch, you could just use a
> multipole switch. A DPDT switch for each mag would allow mag control on one
> set of terminals and an indicator on the other. Mags 'on' would be on the
> open pair of terminals and the indicator would be driven through the pair
> that's closed. Flipping the switch to Mags 'off' would close the mags
> terminals and open the indicator control. But... you then need a way to
> make the indicator circuit 'hot' only when the master is off. You can do
> that with a small relay that's normally closed (meaning that Master ON
> would drive the relay contacts open). Lots of monkey motion, but doable if
> that's what floats your boat. :-)
>
> Charlie
>
>
Message 5
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| Subject: | Re: Z-1 Magneto Wiring Question |
DPDT switches are the way to go. One set of contacts for the magneto's
themselves, the other set of contacts to the buzzer/indicator. You can
put the left and right set of indicator contacts in parallel so the
indicator lights when either of the magneto's is still on.
On 3/4/2016 5:59 PM, Harley Dixon wrote:
> Actually, Mike...with a DPDT switch, the two poles could be wired so
> when they are both closed at the same time...one would ground the
> P-lead, and the other would connect the indicator to power to turn it
> on...The mag would be grounded and off, and the indicator would be on,
> indicating "Mag Off".
>
> Harley
> ------------------------------------------------------------------------
> On 3/4/2016 5:33 AM, Charlie England wrote:
>>
>>
>> On Fri, Mar 4, 2016 at 12:04 AM, mike <mike@vision499.com
>> <mailto:mike@vision499.com>> wrote:
>>
>> I am wiring my magneto's according to the set-up in the Z-1 diagram.
>> I have a phobia about leaving the magneto's on and would like to
>> have some type of sensor to indicate whether the magneto's are on
>> by either a flashing warning light or buzzer but cannot see how
>> to wire it into the set-up as detailed on Z-1
>> All ideas welcome
>> Thanks
>> Mike
>>
>> If you use toggles instead of the high $ key switch, you could just
>> use a multipole switch. A DPDT switch for each mag would allow mag
>> control on one set of terminals and an indicator on the other. Mags
>> 'on' would be on the open pair of terminals and the indicator would
>> be driven through the pair that's closed. Flipping the switch to Mags
>> 'off' would close the mags terminals and open the indicator control.
>> But... you then need a way to make the indicator circuit 'hot' only
>> when the master is off. You can do that with a small relay that's
>> normally closed (meaning that Master ON would drive the relay
>> contacts open). Lots of monkey motion, but doable if that's what
>> floats your boat. :-)
>>
>> Charlie
>
Message 6
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| Subject: | Re: Z-1 Magneto Wiring Question |
On 3/4/2016 8:19 AM, Jared Yates wrote:
> It seems like both of these DPDT solutions are providing an indication
> not exactly of "Mag off" but rather "Mag switch off." This would be
> in addition to the already-provided visual indication of the switch
> handle being in the down position.
>
> On Fri, Mar 4, 2016 at 11:59 AM, Harley Dixon <harley@agelesswings.com
> <mailto:harley@agelesswings.com>> wrote:
>
> Actually, Mike...with a DPDT switch, the two poles could be wired
> so when they are both closed at the same time...one would ground
> the P-lead, and the other would connect the indicator to power to
> turn it on...The mag would be grounded and off, and the indicator
> would be on, indicating "Mag Off".
>
> Harley
> ------------------------------------------------------------------------
> On 3/4/2016 5:33 AM, Charlie England wrote:
>>
>>
>> On Fri, Mar 4, 2016 at 12:04 AM, mike <mike@vision499.com
>> <mailto:mike@vision499.com>> wrote:
>>
>> I am wiring my magneto's according to the set-up in the Z-1
>> diagram.
>> I have a phobia about leaving the magneto's on and would like
>> to have some type of sensor to indicate whether the magneto's
>> are on by either a flashing warning light or buzzer but
>> cannot see how to wire it into the set-up as detailed on Z-1
>> All ideas welcome
>> Thanks
>> Mike
>>
>> If you use toggles instead of the high $ key switch, you could
>> just use a multipole switch. A DPDT switch for each mag would
>> allow mag control on one set of terminals and an indicator on the
>> other. Mags 'on' would be on the open pair of terminals and the
>> indicator would be driven through the pair that's closed.
>> Flipping the switch to Mags 'off' would close the mags terminals
>> and open the indicator control. But... you then need a way to
>> make the indicator circuit 'hot' only when the master is off. You
>> can do that with a small relay that's normally closed (meaning
>> that Master ON would drive the relay contacts open). Lots of
>> monkey motion, but doable if that's what floats your boat. :-)
>>
>> Charlie
>
>
Well, yeah, but the only real indicator of mags off is to go out & pull
the prop through with fuel in the cylinders. :-)
My description gives an indication of 'mags on', with everything else in
the plane 'off'. My assumption was that he wants an extra highly
noticeable reminder of a hot condition when he's walking away from the
plane.
BTW, isn't it going to be fun to parse this conversation for someone who
comes in at the end, and tries to sort out the posting order?
Charlie
(Written by someone who despises top-posting. Never seen a book with
each succeeding paragraph written above the previous one....)
Message 7
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| Subject: | Re: Z-1 Magneto Wiring Question |
Schematic attached
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453426#453426
Attachments:
http://forums.matronics.com//files/mag_hot_warn_171.pdf
http://forums.matronics.com//files/mag_hot_warn_148.jpg
Message 8
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| Subject: | Re: Z-1 Magneto Wiring Question |
Thank you very much, just what I was looking for
Mike
> On March 4, 2016 at 5:05 PM user9253 <fransew@gma
il.com> wrote:
>
>
>
> Schematic attached
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=453426#453426
>
>
> Attachments:
>
> http://forums.matronics.com//files/mag_hot_warn_171.pdf
> http://forums.matronics.com//files/mag_hot_warn_148.jpg
>
>
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