REFLECTOR: Emag/Pmag Reliability?

Paul W. Krasa p.w.krasa at larc.nasa.gov
Wed Jan 25 15:23:43 CST 2006


Send an Email to Marc Z. on the Cozy builders group.  He has extensive 
experience with E/Pmag.  In the end, he had tested multiple versions and 
found them unreliable and re-installed a Slick mag.

See the Cozy archives@ http://www.cozybuilders.org/

Paul
Long EZ 214LP


At 09:22 AM 1/25/2006, you wrote:
>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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