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GRT/Lightspeed/Mags

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aaaron(at)tvp.com.au
Guest

Posted: Mon Jan 23, 2006 11:52 pm Post subject: GRT/Lightspeed/Mags

Hi all

I have a GRT EIS 4000 and one lightspeed plasma III in my MustangII.  I

was going to take the tach signal from the lightspeed but did some web

surfing and have come to the conclusion that it would be better to take

the signal from the P-lead since that way, it would be obvious if the

mag dies (no rpm signal) whereas if the lightspeed dies it will be

obvious because of the rpm drop.  Is this the right approach? I don't

want to have to wire another switch in the panel.  

Second, related question ... I'm using single shielded wire for the

p-lead. Core goes to the contact inside the ferrule (or whatever its

called). I've attached a pigtail to the shield and bolted that to one of

the 4 m/c screws that attached the HT leads.  Is this the right

approach?

Thanks in advance

Allan

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nuckollsr(at)cox.net
Guest

Posted: Tue Jan 24, 2006 11:11 am Post subject: GRT/Lightspeed/Mags

At 06:50 PM 1/24/2006 +1100, you wrote:



 	  Quote: 	
		  



Hi all

I have a GRT EIS 4000 and one lightspeed plasma III in my MustangII.  I

was going to take the tach signal from the lightspeed but did some web

surfing and have come to the conclusion that it would be better to take

the signal from the P-lead since that way, it would be obvious if the

mag dies (no rpm signal) whereas if the lightspeed dies it will be

obvious because of the rpm drop.  Is this the right approach? I don't

want to have to wire another switch in the panel.


	


     It doesn't make much difference. RPM displays have almost

     zero significance in effecting a no-sweat termination of

     flight. Do whatever is easiest and lowest risk for noise

     propagation. I'd tie it to the electronic tach output from

     the electronic ignition.



 	  Quote: 	
		  Second, related question ... I'm using single shielded wire for the

p-lead. Core goes to the contact inside the ferrule (or whatever its

called). I've attached a pigtail to the shield and bolted that to one of

the 4 m/c screws that attached the HT leads.  Is this the right

approach?


	


     Yes.



     Bob . . .



      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

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