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Coil selector

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mrspudandcompany(at)veriz
Guest

Posted: Wed Jul 02, 2008 4:12 am Post subject: Coil selector

I have a dual electronic ignition going to 2 separate coils.  The output of the coils go to a coil selector and the output goes to the distributor and to the single set of plugs.  

   

Does anyone have any data on the reliability of the coil selector method.  I understand they are very reliable, but it is a single point of failure.  

   

Comments please,  

   

Thanks, Roger  

       [quote][b]

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n801bh(at)NetZero.com
Guest

Posted: Wed Jul 02, 2008 4:57 am Post subject: Coil selector

Roger, I have the same set up on my experimental... I have not heard of a single time a coil switcher failing.  Feel free to head to my website for further pics on how I did mine or if ya got more time,, get a beer or two and watch my video thats on google and it will clearly show the complete set up.. 

http://video.google.com/videoplay?docid=-7272451917550730841&hl=en

Ben Haas

N801BH

www.haaspowerair.com



-- "ROGER &  JEAN CURTIS" <mrspudandcompany(at)verizon.net> wrote:

  

I have a dual electronic ignition going to 2 separate coils.  The output of the coils go to a coil selector and the output goes to the distributor and to the single set of plugs. 

  

Does anyone have any data on the reliability of the coil selector method.  I understand they are very reliable, but it is a single point of failure. 

  

Comments please, 

  

Thanks, Roger

 	  Quote: 	
		  



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nuckolls.bob(at)cox.net
Guest

Posted: Wed Jul 02, 2008 5:30 am Post subject: Coil selector

At 08:08 AM 7/2/2008 -0400, you wrote:



 	  Quote: 	
		  I have a dual electronic ignition going to 2 separate coils.  The output 

of the coils go to a coil selector and the output goes to the distributor 

and to the single set of plugs.



Does anyone have any data on the reliability of the coil selector 

method.  I understand they are very reliable, but it is a single point of 

failure.


	


  The only one I had occasion to take apart was an

  array of high voltage rectifiers (same as those used

  in microwave ovens) intended to convey spark energy

  from either coil to a common load (distributor).



  Compared to the energy that these rectifiers handle

  in microwave ovens, their duty as traffic cops in

  the ignition systems borders on trivial. These should

  run the lifetime of the airplane.



  Bob . . .

        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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mrspudandcompany(at)veriz
Guest

Posted: Wed Jul 02, 2008 6:06 am Post subject: Coil selector

Thanks, Guys,



This is what I have been hearing for some time.  Just wanted a confirmation.



Roger



--

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frank.hinde(at)hp.com
Guest

Posted: Wed Jul 02, 2008 7:54 am Post subject: Coil selector

I think your talking about the coil joiner..A round blob of  plastic that has 3 high voltage terminals..

  

 If so yes they are Extremely reliable..Its 2 HV diodes..In  fact it really is not a sigle point of failure...its two diodes that can fail  indepedantly....These have thousands of flight hours on  them.

  

 Frank



   From:  owner-aeroelectric-list-server(at)matronics.com  [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of ROGER  & JEAN CURTIS

Sent: Wednesday, July 02, 2008 5:08 AM

To:  aeroelectric-list(at)matronics.com

Subject: Coil  selector

 

  

I have a dual electronic ignition  going to 2 separate coils.  The output of the coils go to a coil selector  and the output goes to the distributor and to the single set of  plugs. 

  

Does anyone have any data on the  reliability of the coil selector method.  I understand they are very  reliable, but it is a single point of failure. 

  

Comments please, 

  

Thanks,  Roger

[quote]



ist">http://www.matronics.com/Navigator?AeroElectric-List

ics.com

.matronics.com/contribution



[b]

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klehman(at)albedo.net
Guest

Posted: Wed Jul 02, 2008 4:13 pm Post subject: Coil selector

My memory is that 10 years ago there was a string of 5 or 6 12 kv diodes 

in each leg of the MSD unit. A dozen years or so ago there was a rumour 

of a bad batch resulting in a couple that shorted out the back to ground 

but it would seem they are pretty much bullet-proof. I mounted mine on a 

piece of plastic for the heck of it. There was some conjecture that 

you'd never even know if one or more diodes shorted unless you tested 

the forward voltage drop occasionally. Easy to do for example with a 

scope and an isolated ac supply. Expect a drop of around 60 volts in 

each leg. However I don't think it is worth the effort as I've never 

heard of such a failure occurring.

Ken



Hinde, Frank George (Corvallis) wrote:

 	  Quote: 	
		   I think your talking about the coil joiner..A round blob of plastic that 

 has 3 high voltage terminals..

  

 If so yes they are Extremely reliable..Its 2 HV diodes..In fact it 

 really is not a sigle point of failure...its two diodes that can fail 

 indepedantly....These have thousands of flight hours on them.

  

 Frank

 

 ------------------------------------------------------------------------

 *From:* owner-aeroelectric-list-server(at)matronics.com 

 [mailto:owner-aeroelectric-list-server(at)matronics.com] *On Behalf Of 

 *ROGER & JEAN CURTIS

 *Sent:* Wednesday, July 02, 2008 5:08 AM

 *To:* aeroelectric-list(at)matronics.com

 *Subject:* Coil selector

 

 I have a dual electronic ignition going to 2 separate coils.  The output 

 of the coils go to a coil selector and the output goes to the 

 distributor and to the single set of plugs.

 

  

 

 Does anyone have any data on the reliability of the coil selector 

 method.  I understand they are very reliable, but it is a single point 

 of failure.

 

  

 

 Comments please,

 

  

 

 Thanks, Roger

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