Today's Message Index:
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1. 02:47 AM - Re: Re: Magneto Toggle Switches (Clive Richards)
2. 07:47 AM - Magneto Toggle Switches (Paul Millner)
3. 08:51 AM - Re: Magneto Toggle Switches (user9253)
4. 08:56 AM - Re: Magneto Toggle Switches (Bill Putney)
5. 09:45 AM - Re: Re: Magneto Toggle Switches (Bill Putney)
6. 09:45 AM - Re: Magneto Toggle Switches (user9253)
7. 10:12 AM - Re: Re: Magneto Toggle Switches (Jared Yates)
8. 10:25 AM - Re: Magneto Toggle Switches (user9253)
Message 1
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Subject: | Re: Magneto Toggle Switches |
Joe sorry you are correct I was looking at drawing on my phone & missed
connection 1 to 3 on right mag.
Clive
On 6 February 2016 at 00:47, user9253 <fransew@gmail.com> wrote:
>
>
> > if you do not have a impulse coupler on the right mag this must be off
> for starting.
>
> Yes, the right mag is off for starting. Notice the bottom half of the
> right switch. Whenever the switch is not in the center position, the right
> mag is off. And the switch must be moved off center to start the engine.
> I agree that a key operated starter is the safest. This circuit is not
> for me. I drew this circuit at the request (quoted below) of someone who
> posted on VansAirforce.
>
> > If I was to use 2 toggle switches (left mag switch would have momentary
> position for starter) for my magnetos, how could I wire it so that it would
> operate like a keyed ignition switch, i.e., shut the right mag down during
> start, but automatically come online after I release the starter?
>
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=452629#452629
>
>
Message 2
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Subject: | Magneto Toggle Switches |
On 2/5/2016 4:47 PM, user9253 wrote:
> If I was to use 2 toggle switches (left mag switch would have momentary position
for starter) for my magnetos, how could I wire it so that it would operate
like a keyed ignition switch, i.e., shut the right mag down during start, but
automatically come online after I release the starter?
Seems like you'd want the starter on the RIGHT mag toggle switch... and
in the "start" position it grounds the right mag P-lead.
Paul
Message 3
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Subject: | Re: Magneto Toggle Switches |
> Seems like you'd want the starter on the RIGHT mag toggle switch... and
> in the "start" position it grounds the right mag P-lead.
You are correct and that is what the circuit above does. And in addition, the
left switch must also be moved to the start position to enable starting. The
starter will not operate unless both switches are lifted up to the start position.
And while starting, the right mag is disabled. If only one switch is up,
the engine will not crank.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452646#452646
Message 4
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Subject: | Re: Magneto Toggle Switches |
Paul's right. If the mag with the impact coupler is the left mag (I
think that's kind of standard), it's easiest to do this with the right
mag switch. If you have a double pole double throw switch with the
configuration ON-OFF-Momentary, you can use one pole for the for the
starter and one pole for the mag P lead. On the pole for the mag, ground
the common and run both the top and bottom switch legs to the mag P
lead. The other pole runs battery to the starter relay. Common to the
battery and Momentary to the relay. On the panel the "ON" position
should be on the bottom of course and the "Momentary" should be on the top.
Make sure you test the switch contacts with a meter before you install
it so you're sure which contacts are closed in which positions. Usually
with a switch down the top and common contacts on the back to the switch
are closed. It depends on the mechanical construction of the switch. You
don't want to get a surprise when you turn the master on the fist time
and have the starter running with an un-grounded P lead.
Bill
2/5/16 17:03, Paul Millner wrote:
>
>
> On 2/5/2016 4:47 PM, user9253 wrote:
>> If I was to use 2 toggle switches (left mag switch would have
>> momentary position for starter) for my magnetos, how could I wire it
>> so that it would operate like a keyed ignition switch, i.e., shut the
>> right mag down during start, but automatically come online after I
>> release the starter?
>
> Seems like you'd want the starter on the RIGHT mag toggle switch...
> and in the "start" position it grounds the right mag P-lead.
>
> Paul
>
>
Message 5
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Subject: | Re: Magneto Toggle Switches |
If you interlock the switches so that they both have to be "HOT" to run
the starter, you deprive yourself of the ability to turn the starter a
few blades to move some oil around the engine before you actually start
the engine.
If you have the left switch just an Off-Hot switch and have the right
switch be an Off-Hot-Start switch you can run the starter motor without
starting the engine.
Bill
On 2/6/16 08:49, user9253 wrote:
>
>
>> Seems like you'd want the starter on the RIGHT mag toggle switch... and
>> in the "start" position it grounds the right mag P-lead.
> You are correct and that is what the circuit above does. And in addition, the
left switch must also be moved to the start position to enable starting. The
starter will not operate unless both switches are lifted up to the start position.
And while starting, the right mag is disabled. If only one switch is
up, the engine will not crank.
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=452646#452646
>
>
Message 6
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Subject: | Re: Magneto Toggle Switches |
Bill Millner, you are absolutely correct as is Paul. And my circuit posted above
does exactly what you recommend.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452648#452648
Message 7
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Subject: | Re: Magneto Toggle Switches |
I'd be glad to give that ability up in order to eliminate the chance of a pilot
running a battery dead trying to start an engine with no fire. If there is really
a desire to dry motor, one could do so by eliminating fuel instead of spark,
but I'm doubtful that it is especially beneficial in the long term.
> On Feb 6, 2016, at 12:43, Bill Putney <billp@wwpc.com> wrote:
>
>
> If you interlock the switches so that they both have to be "HOT" to run the starter,
you deprive yourself of the ability to turn the starter a few blades to
move some oil around the engine before you actually start the engine.
>
> If you have the left switch just an Off-Hot switch and have the right switch
be an Off-Hot-Start switch you can run the starter motor without starting the
engine.
>
> Bill
>
>> On 2/6/16 08:49, user9253 wrote:
>>
>>
>>> Seems like you'd want the starter on the RIGHT mag toggle switch... and
>>> in the "start" position it grounds the right mag P-lead.
>> You are correct and that is what the circuit above does. And in addition, the
left switch must also be moved to the start position to enable starting. The
starter will not operate unless both switches are lifted up to the start position.
And while starting, the right mag is disabled. If only one switch is
up, the engine will not crank.
>>
>> --------
>> Joe Gores
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=452646#452646
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
Message 8
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Subject: | Re: Magneto Toggle Switches |
> you deprive yourself of the ability to turn the starter a
> few blades to move some oil around the engine before you actually start
> the engine
Right again. But I am not wiring my plane this way. I drew this circuit for someone
else who wants it like this. You can read his VansAirforce post:
http://www.vansairforce.com/community/showthread.php?t=134260
Don't key operated mag-start switches have the same limitation?
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452651#452651
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