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I have been told running one electronic ignition and one magneto has a
problem . The aftermarket electronic ignition, on a non turbo
installation,
has more timing advance to optimize both power and economy by lighting the
mixture earlier as altitude is increased. The problem is, the later timed
mag tries to fire as the pressure is rising from the earlier firing of the
electronic ignition. This pressure rise will prevent the plug from firing
and cause the coil in the mag to short. (Most of us have seen the old
spark
plug testers that would fail the wide gapped or dirty plug as the pressure
was increased) The coil on the mag dies about 300 hours after the
electronic ignition is installed. I have heard this from several people
who
experienced it.
My partner and I have been running one electronic ignition and one mag for
over 500 hours and have experienced no problem to date with the Mag as you
describe above. The plugs seem to fire fine as we do a Mag check on each
flight. When turning off the electronic ignition, the typical Mag drop
results. When turning off the mag the drop is much less and barely
noticeable.
Denis
N235WC (IO-320)
LML website: http://members.olsusa.com/mkaye/maillist.html
LML Builders' Bookstore: http://www.buildersbooks.com/lancair
Please remember that purchases from the Builders' Bookstore
assist with the management of the LML.
Please send your photos and drawings to marvkaye@olsusa.com.
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