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Magneto Switches and Wiring

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Jeff Smith

Joined: 10 Jan 2006
Posts: 9
Location: Knoxville, TN

Posted: Thu Sep 14, 2006 2:12 am Post subject: Magneto Switches and Wiring

Listers,

  

 I've read Bob's book and searched the archives but still can't seem to  find answers to confirm that my desired approach on magneto and starter wiring  will work (or maybe there is a simpler way).

  

 I have two traditional magnetos for an IO-360.  I would like to  have a toggle switch for each mag, and a momentary toggle for the starter (with  a toggle guard for added protection of inadvertent activation).

  

 I don't fully understand the "impulse" aspect of  the magneto.  Could someone help explain such and outline the correct  wiring for this setup?

  

 Thanks,

  

 Jeff

  [quote][b]

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khorton01(at)rogers.com
Guest

Posted: Thu Sep 14, 2006 2:53 am Post subject: Magneto Switches and Wiring

On 14 Sep 2006, at 06:08, SMITHBKN(at)aol.com (SMITHBKN(at)aol.com) wrote:

 	  Quote: 	
		     

 I don't fully understand the "impulse" aspect of the magneto.  Could someone help explain such and outline the correct wiring for this setup?

  

	




The impulse function is not electrically controlled.  It is controlled by a mechanical device inside the mag.  The mag either has an impulse coupler, or it doesn't.  Typical installations have only one mag with an impulse coupler.  In that case, this is the only mag that you want to have ON during start.  The one with without the impulse coupler needs to be OFF.  That can be accomplished by pilot switch selections, or the start switch could be wired to disable the non-impulse mag while the starter is powered.



 Kevin Horton         RV-8 (finishing kit)

Ottawa, Canada

http://www.kilohotel.com/rv8

 



 [quote][b]

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nuckollsr(at)cox.net
Guest

Posted: Fri Sep 15, 2006 2:40 am Post subject: Magneto Switches and Wiring

At 06:08 AM 9/14/2006 -0400, you wrote:



 	  Quote: 	
		  Listers,



I've read Bob's book and searched the archives but still can't seem to 

find answers to confirm that my desired approach on magneto and starter 

wiring will work (or maybe there is a simpler way).



I have two traditional magnetos for an IO-360.  I would like to have a 

toggle switch for each mag, and a momentary toggle for the starter (with a 

toggle guard for added protection of inadvertent activation).



I don't fully understand the "impulse" aspect of the magneto.  Could 

someone help explain such and outline the correct wiring for this setup?


	




  This is discussed in an article I published at:



http://aeroelectric.com/articles/Shower-of-Sparks/ShowerOfSparks.pdf



  That article needs to be updated to talk about the

  new, solid-state implementation of "SOS" technology

  that can be added to an impulse coupled mag. This

  impulse coupler provides the delayed opening of the

  points so that a two-point mag is needed to implement

  the energy augmentation offered by the "Slick Start".

  See:



http://aircraftspruce.com/catalog/eppages/slickstart.php



  Check out the drawing:



http://www.aeroelectric.com/PPS/Engine/Ignition/TogMagSw.pdf

   Here I show the use of toggle switches in combination

   with a push button for starting -and- a way you can use

   spring loaded toggle switches to combine starter control

   into the ignition switches thereby eliminating one

   panel control.



   A common feature of both drawings is interlocking

   of starter control through the two switches so that

   the starter can be activated only with left mag (impulse

   coupled) ON and right mag OFF. This requirement for

   specific positioning of the switches makes inadvertent

   starter activation exceedingly unlikely and reduces

   the need for any kind of separate guarding of the

   starter switch.



   Bob. . .



 	  Quote: 	
		  

Thanks,



Jeff

 

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        Bob . . .

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