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Erich_Weaver(at)URSCorp.c
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 Posted: Sat Mar 11, 2006 4:37 pm Post subject: p-mag wiring |
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Bob:
My level of electrical knowledge is pretty limited, but is it possible that
Figure Z-33 in the 'Connection showing wiring for P-mags has an error?
Z-33 has the p-mag wires labeled by color (grn, red orn, and blk). Power
appears to be supplied to the p-mag from the bat bus through the "orn" wire
when the 2-10 switch is in the up position.
Comparing to the e-magair manual - see pgs 4 and 15 in
http://www.emagair.com/Manual%20L113v8.pdf
the manual seems to indicate that +13.8V power would be supplied by the red
wire (postion 5 on the control plug), and that the "orn" wire (position 4
on the plug) is the P-lead to ground (NOT power). The blk and grn wires
are for ground and tach respectively, consistent with Z-33.
Did I catch you, or am I just too hung up on wire colors?
While I got you cornered (?), I am unclear on how the additional switch you
suggest for ign maintenance would be used. When closed, it appears to
supply power from the bat bus to the p-mags while the two ignition switches
are in the off position. Okay, but what does this do for me?
still learning...
Erich Weaver
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nuckollsr(at)cox.net
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| Posted: Wed Mar 15, 2006 7:48 am Post subject: p-mag wiring |
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Erich,
Sorry to take so long to get back on this. Your questions prompted a review
of some p-mag issues in Figures Z-13/8 and Z-33 along with the text in
the notes which I thought I'd fixed some time ago. In looking over the
originals this morning, I found several things that needed fixing so
I've updated Appendix Z to Revision F and posted the new document at:
http://aeroelectric.com/articles/Rev11/AppZ_R11F.pdf
Thanks for bringing this to my attention.
Bob . . .
At 07:33 PM 3/11/2006 -0500, you wrote:
| Quote: |
Bob:
My level of electrical knowledge is pretty limited, but is it possible that
Figure Z-33 in the 'Connection showing wiring for P-mags has an error?
Z-33 has the p-mag wires labeled by color (grn, red orn, and blk). Power
appears to be supplied to the p-mag from the bat bus through the "orn" wire
when the 2-10 switch is in the up position.
Comparing to the e-magair manual - see pgs 4 and 15 in
http://www.emagair.com/Manual%20L113v8.pdf
the manual seems to indicate that +13.8V power would be supplied by the red
wire (postion 5 on the control plug), and that the "orn" wire (position 4
on the plug) is the P-lead to ground (NOT power). The blk and grn wires
are for ground and tach respectively, consistent with Z-33.
Did I catch you, or am I just too hung up on wire colors?
While I got you cornered (?), I am unclear on how the additional switch you
suggest for ign maintenance would be used. When closed, it appears to
supply power from the bat bus to the p-mags while the two ignition switches
are in the off position. Okay, but what does this do for me?
still learning...
Erich Weaver
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