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Thread: P Mags vs Lightspeed's Plasma II or Plasma III

  1. #41
    Scouter's Avatar
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    Stewart
    my first carboncub i flew about 250 hrs, the second one has close to 100, both with Lightspeeds Overall good service, excepting early on with number 1 cub. it would have a spell of rough running on one side. After a bit of looking around we found this on one coil:

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    The bottom coils are easy to inspect, the top ones are under the plenum This was a top one. i dont care for this slide on female crimp connector. Seems like it is lawnmower technology.
    Ive not had any more issues,i allways look at them with the cowl off.
    Im also partly paranoid about the battery failing inflight, then the little backup not working when aske d to. M y third backup is in my pocket, to backfeed thru the accsy socket

    Click image for larger version. 

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    I know, belts and suspenders

    jim
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  2. #42
    40m's Avatar
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    Quote Originally Posted by Scouter View Post
    Stewart
    my first carboncub i flew about 250 hrs, the second one has close to 100, both with Lightspeeds Overall good service, excepting early on with number 1 cub. it would have a spell of rough running on one side. After a bit of looking around we found this on one coil:

    Name:  IMG_3148.JPG
Views: 223
Size:  86.9 KB


    The bottom coils are easy to inspect, the top ones are under the plenum This was a top one. i dont care for this slide on female crimp connector. Seems like it is lawnmower technology.
    Ive not had any more issues,i allways look at them with the cowl off.
    Im also partly paranoid about the battery failing inflight, then the little backup not working when aske d to. M y third backup is in my pocket, to backfeed thru the accsy socket

    Click image for larger version. 

Name:	15365ba6-cb57-4bd0-ad69-4a018653acad_1.d97747877fd6348cd7d41fc73ddd67b4.jpeg 
Views:	219 
Size:	27.2 KB 
ID:	41770


    I know, belts and suspenders

    jim
    And you can always use it with your Milwaukee jacket

    From Genesis: "And God promised men that good and obedient wives would be
    found in all corners of the earth."

    Then he made the earth round... and He laughed and laughed and laughed!

  3. #43
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    True that Glenn, I never considered it. I actually used this little one at christmas time. A lady left the key on in her car and killed it. Plugged it in and waited 10 mins. She was smokin hot so the time passed quickly, her mostly drunk husband called my little booster names, and said I had a purty makeup case. The thing started right up, and I should have brought her home. Figured that wouldnt work out either so traded the boost for a hug. She went home with drunk ass
    Tru story

    Jim
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  4. #44

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    Jim, doesn't the Carbon Cub ise a TCW IBBS battery backup for the Electronic ignition?

    TCW just got TSO approval for the IBBS packs. I'm not very concerned about total electrical failure, especially given how easy battery backup is to add.
    http://www.tcwtech.com/Installation%...001_Rev1.3.pdf

    http://www.tcwtech.com/

  5. #45
    WWhunter's Avatar
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    Quote Originally Posted by stewartb View Post
    I had Pmags on the last motor. If I was buying EI today I'd buy EFII's System 32 or Light Speed. I'm moving toward solid state, but I'll probably run mags initially. I'm hoping for some more user comments and service comments on the various systems.

    Stewartb, could you expond on why you are choosing a different system over the Pmag? Were you dissatisfied with the one's you had? Just curious, the plane I am trying to finish and get flying has an early O-320 narrow deck. It has dual Pmags on it and after reading most comments, I thought they were they best choice.

  6. #46

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    My Pmags worked fine. I know of a few failures and that got my attention. In other electronics in my life I've appreciated the change from moving parts to solid state, like with computer hard drives. Reliability is better with no moving parts. And in the aircraft example the solid state systems are lighter and easier to maintain. I have no bones with Pmag. I just want to consider my options. The electrical failure self-power thing isn't reason enough to dismiss other systems.
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  7. #47
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    Quote Originally Posted by stewartb View Post
    Jim, doesn't the Carbon Cub ise a TCW IBBS battery backup for the Electronic ignition?

    TCW just got TSO approval for the IBBS packs. I'm not very concerned about total electrical failure, especially given how easy battery backup is to add.
    http://www.tcwtech.com/Installation%...001_Rev1.3.pdf

    http://www.tcwtech.com/
    Yes exactly right Stewart. It’s wired and fixed on the right boot boot cowl. I check it’s operation at every mag check and can monitor both primary and backup battery voltage. That being said the backups battery failed on the first one
    shortly after I got it. And I haven’t heard of one quitting while flying from lack of juice yet

    jim

  8. #48
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    I've had a couple of issues with the Pmags. Still really like them, but #1) had an edge connector fail, which caused one P-mag to lose two cylinders. Emag repaired for free, but had to turn around and head home during a trip out of town for the issue. #2 - Had a second failure on the same P-mag, probably caused by the repairs to the first failure. The head of the mag quite literally fell off the mounting base in flight. Apparently someone failed to torque the mounting screws correctly when they put it back together again. Again, Emag covered the repair at no cost, but was down for 3 weeks as it coincided with Oshkosh time. Issue #3 was a starting issue that only involved the Pmags tangentially. Replaced the crappy pull starter on my O-200 with a B&C starter. Starter spun the engine like crazy, but it wouldn't start. Would fire on the fist pull if I propped it. It would start when warmed up, but a week later, the engine would spin like crazy, but not start. The problem was that the B&C starter was pulling the voltage down low enough that the P-mags wouldn't fire. Replaced the 175 CCA flooded cell battery with a 325 CCA Earth-X battery. End of issue. I've seen this issue with an O-320 with Pmags as well, so it's not unique to my O-200. I really feel like issues #1 and #2 were kind of unusual one off issues, and not really reflective of issues with Pmags as I have only seen one other issue with an edge connector on another plane.

    I helped a friend with his EFII fired IO-360 with electrical design on his RV. He didn't really want to have to mount a backup battery for his EFII ignition, so added a light weight B&C dynamo on the vacuum pump mount, and a relay to toggle between alternators. With this configuration, an alternator failure is not an emergency, but only an inconvenience. His primary alternator failed 1000 miles from home last year. No big deal. He just minimized his electrical load and ran on the backup dynamo for electrical power for the remainder of his trip, then dealt with the failed alternator once he was home in his own hangar.

    -Cub Builder
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  9. #49

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    Don't know much about them, but the SureFly EFI system recently received their STC for replacement of a single mag (certified engines/planes). Solid state, no moving parts, and uses the Slick harness. Lots of talk about them on several other forums, where they are being well received. https://www.surefly.aero/
    Jim Parker
    '65 Champion 7ECA - Flying
    ?? Bearhawk Patrol - Building

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