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Z13-8 N error ?

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jpx(at)Qenesis.com
Guest

Posted: Sun Jan 27, 2008 3:01 pm Post subject: Z13-8 N error ?

Reading through the docs on E-Mag and P-Mag products, I think the  

wiring as shown on Z13-8 version N is incorrect.



First, the labels are switched.  The P-Mag is the one with the  

internal power generator.



Second, the wiring for the real P-Mag I believe is incorrect.

As shown, in the center test position, the P-lead, pin 4 is grounded  

and the battery bus is applied to pin 5.  The engine should stop if  

the P-lead is grounded and it is not possible to test the internal  

power generator if there is power externally applied.

Keep the wiring all the same, but specify the switch as S700-2-1 and I  

think it should be correct.



Jeff Page

Dream Aircraft Tundra #10

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nuckolls.bob(at)cox.net
Guest

Posted: Sun Jan 27, 2008 7:38 pm Post subject: Z13-8 N error ?

At 05:56 PM 1/27/2008 -0500, you wrote:



 	  Quote: 	
		  



Reading through the docs on E-Mag and P-Mag products, I think the

wiring as shown on Z13-8 version N is incorrect.



First, the labels are switched.  The P-Mag is the one with the

internal power generator.



Second, the wiring for the real P-Mag I believe is incorrect.

As shown, in the center test position, the P-lead, pin 4 is grounded

and the battery bus is applied to pin 5.  The engine should stop if

the P-lead is grounded and it is not possible to test the internal

power generator if there is power externally applied.

Keep the wiring all the same, but specify the switch as S700-2-1 and I

think it should be correct.


	


    I checked the drawings again and they are correct as

    published.  The P-Mag is wired to the main bus. This

    lets you do the occasional "test" of the internal alternator

    by shutting down the main bus while the engine is running.



    This is easy to do by configuring the system to the

    ENDURANCE MODE where flight is sustained with only the E-bus

    and battery-bus hot. Emagair suggests this test be conducted

    infrequently . . . about as often as you would test the

    ENDURANCE MODE of operation for your electrical system.



    Emagair's drawings do not exploit this feature unique to

    Z-13/8 . . . and it should not. The vast majority of their

    customers will not be using Z-13/8. I hope that the majority

    of my customers ARE using Z-13/8.



    The E-mag is wired to run from the always-hot battery bus.

    A means by which power can be removed from the ignition

    system at shutdown is necessary. Hence the double-pole, three-

    position, progressive transfer switch offers independent

    control of E-Mag power and ONLY AFTER the E-mag has been shut

    down by means of grounding pin 4 (control) has been suggested.



    This particular architecture was crafted to support AeroElectric

    Connection philosophy for having all electrically dependent engine

    functions run from a battery bus. This goes toward a design

    goal that allows shutting down the entire electrical system

    with minimal (if not zero) influence on engine operations.



    Since the E-Mag needs power, it has been wired to the battery

    bus. The P-Mag is internally powered and needs only occasional

    tests of its internal power operations . . . which is easy to do

    when wired as shown by combing the ignition tests with any

    ENDURANCE MODE tests one might choose to conduct on the

    rest of the system.

    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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