REFLECTOR: Emag/Pmag Reliability?

[Scott Derrick]

Ron,

I was hoping somebody with PMag experience would answer your thread.

I waiting for the 6 cylinder model to come out and I understand they 
delayed working on that until they felt they had a bullet proof 4 
cylinder model.

Scott

Ron Brown wrote:
>
>
> I am a EAA Technical Counselor for our EAA chapter.  One of our 
> members is building an RV-9 and had planned to use Pmags.  I told him 
> that I thought they were still having some reliability problems.  Any 
> updates from any of you using the Emag/Pmag?
>
> He ran across the below note from Nick Ugolini, a LongEZ flyer.
>
> Dear E-MAG,
>
> After uneventful three hour cross country flight, my engine quit and 
> would not restart while taxing to the hangar.  The Lycoming engine has 
> a Lightspeed Electronic Ignition and a backup P-MAG for ignition.  
> When tracking down the problem, I discovered I had wired both the 
> P-MAG and the Lightspeed to a shared common negative ground point.  
> The ground connection was corroded thus allowing no ships power to 
> flow to either ignition system.
>
> After reflecting on my trip, I realized that at some point in the 
> flight the power had simultaneously failed to both ignition systems.  
> I had flown at least two hours completely unaware the P-Mag was my 
> only source of ignition. Unlike the roughness of my previous magneto, 
> the P-MAG causes no change in smoothness or sense of lost power.  The 
> engine quit only after the engine rpm was reduced to a point where the 
> P-MAG could no longer supply its own internal power (per design).
>
> With absolute certainty, I fully credit your P-MAG for saving my plane 
> and most likely my life.
>
> Sincerely,
>
>
>
> Nick Ugolini
>
>
>
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