Tim(at)MyRV10.com
Guest
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 Posted: Wed Jul 05, 2006 7:49 am Post subject: Lightspeed with Keyswitch and 1 Mag Wiring |
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This is a repost of previous info. I had a builder ask me about it
and I couldn't find it in the archives well, so I thought I'd
resend it with a good subject line.
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Wiring a Keyswitch Ignition - Lightspeed Plasma III/II+ ignition and a Mag
Another non-RV10 builder, Dave Sundberg passed this on to me previously,
and I wired mine this way and it indeed works fine. It does seem a bit
like black magic, but seeing as it works fine I won't be complaining.
Test it out before and after you run the engine, but it should work fine.
The configuration is a Mag on the Left side, feeding the lower plugs,
and a Lightspeed Plasma III (or II+) feeding the top plugs as the Right
system. Note that allthough Lightspeed calls it a keyswitch "Option",
it's always on the system, just optional to connect.
* The P-Lead from the Mag goes to the L-Terminal on the Switch with
the shield connected to the GRN terminal on the mag and not connected to
anything on the switch end.
* The P-Lead from the LS (Pin 1) goes to the R-Terminal on the
switch and the shield (Pin 9) goes to the GRN-Terminal in the center of
the switch.
* Do not connect the jumper from the R-Term to the GRN-Terminal
next to it.
* Do not connect the center GRN-Terminal on the switch to aircraft
ground. Both ignitions are grounded out with the switch in the OFF position.
Dave had been flying and it was working for him. I am flying too and
it's working great for me. I had previously spent time hooking mine up
and ohming things out and was confused as heck. I also was confused in
that the P-Lead on the mag is seemingly shorted to ground even with the
wire disconnected, so I couldn't easily tell that it would be grounded
by the switch. (Turns out this is normal) If you hook it all up, except
for the mag P-Lead, you can indeed see that they ground the way their
supposed to by using your ohmmeter.
I also have this posted on my Electrical Tips section on my site.
Tim
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Tim Olson - RV-10 N104CD - Flying
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