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Z-1 Magneto Wiring Question

 
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mike(at)vision499.com
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PostPosted: Thu Mar 03, 2016 10:06 pm    Post subject: Z-1 Magneto Wiring Question Reply with quote
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
 

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racerjerry



Joined: 15 Dec 2009
Posts: 202
Location: Deer Park, NY
PostPosted: Fri Mar 04, 2016 3:47 am    Post subject: Re: Z-1 Magneto Wiring Question Reply with quote
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.

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ceengland7(at)gmail.com
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PostPosted: Fri Mar 04, 2016 5:38 am    Post subject: Z-1 Magneto Wiring Question Reply with quote
On Fri, Mar 4, 2016 at 12:04 AM, mike <mike(at)vision499.com (mike(at)vision499.com)> wrote:
Quote:
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. Smile
Charlie

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harley(at)AgelessWings.co
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PostPosted: Fri Mar 04, 2016 6:01 am    Post subject: Z-1 Magneto Wiring Question Reply with quote
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:

Quote:


On Fri, Mar 4, 2016 at 12:04 AM, mike <mike(at)vision499.com (mike(at)vision499.com)> wrote:
Quote:
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. Smile


Charlie



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email(at)jaredyates.com
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PostPosted: Fri Mar 04, 2016 6:20 am    Post subject: Z-1 Magneto Wiring Question Reply with quote
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(at)agelesswings.com (harley(at)agelesswings.com)> wrote:
Quote:
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:

Quote:


On Fri, Mar 4, 2016 at 12:04 AM, mike <mike(at)vision499.com (mike(at)vision499.com)> wrote:
Quote:
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. Smile


Charlie





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matronics(at)rtist.nl
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PostPosted: Fri Mar 04, 2016 6:35 am    Post subject: Z-1 Magneto Wiring Question Reply with quote
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:

Quote:
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:

Quote:


On Fri, Mar 4, 2016 at 12:04 AM, mike <mike(at)vision499.com (mike(at)vision499.com)> wrote:
Quote:
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. Smile


Charlie




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ceengland7(at)gmail.com
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PostPosted: Fri Mar 04, 2016 7:19 am    Post subject: Z-1 Magneto Wiring Question Reply with quote
On 3/4/2016 8:19 AM, Jared Yates wrote:

Quote:
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(at)agelesswings.com (harley(at)agelesswings.com)> wrote:
Quote:
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:

Quote:


On Fri, Mar 4, 2016 at 12:04 AM, mike <[url=mailto:mike(at)vision499.com]mike(at)vision499.com (mike(at)vision499.com)[/url]> wrote:
Quote:
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. Smile


Charlie








Well, yeah, but the only real indicator of mags off is to go out & pull the prop through with fuel in the cylinders. Smile

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....)

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user9253



Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan
PostPosted: Fri Mar 04, 2016 8:05 am    Post subject: Re: Z-1 Magneto Wiring Question Reply with quote
Schematic attached

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mike(at)vision499.com
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PostPosted: Fri Mar 04, 2016 10:08 am    Post subject: Z-1 Magneto Wiring Question Reply with quote
Thank you very much, just what I was looking for
 
Mike
> On March 4, 2016 at 5:05 PM user9253 <fransew(at)gma
 
il.com> wrote:
>
>
> --> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com>
>
> 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
> <========================<br=============
>
>
>

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