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X-Original-Date: Thu, 7 Dec 2006 13:25:52 -0500
From: "Clark Baker" <bakercdb@gmail.com>
X-Original-To: "Lancair Mailing List" <lml@lancaironline.net>
Subject: High Ignition Advance Problem
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On the 2nd leg of a long cross country trip, I noticed that CHTs were
running noticeably higher than usual on climb out.  After leveling off at
6,500msl, CHTs were uniformly running approximately 40+ degrees higher than
normal.  Upon landing, the problem was eventually traced to one of my PMag
ignitions that, was going to full advance at idle (39degrees). This was a
failure mode of electronic ignitions that I hadn't considered before.  Given
the engine seemed to be running fine otherwise, I didn't try switching off
one ignition in flight, which likely would have pinpointed the problem.

Regards,
Clark Baker

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<div>On the 2nd leg of a long cross country trip, I noticed that CHTs were running noticeably higher than usual on climb out.&nbsp; After leveling off at 6,500msl, CHTs were uniformly running approximately 40+ degrees higher than normal.&nbsp; Upon landing, the problem was eventually traced to one of my PMag ignitions that, was going to full advance at idle (39degrees).&nbsp;This was a failure mode of electronic ignitions that I hadn't considered before.&nbsp; Given the engine seemed to be running fine otherwise, I didn't try switching off one ignition in flight, which likely would have pinpointed the problem.
</div>
<div>&nbsp;</div>
<div>Regards,</div>
<div>Clark Baker</div>
<div>&nbsp;</div>

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