From: "Charlie England" <flyrotary@lancaironline.net>
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Date: Sat, 20 Aug 2016 08:30:03 -0500
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Subject: Chilled spark plugs: Thermal paste?
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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An article in Sport Aviation several months ago (which I just got around to
reading; unusual to find useful info there) talked about Rotax's
recommendations for spark plugs in their engines. One thing they require,
in addition to using the correct heat range, was the use of thermal
conducting paste (similar to what you'd put on a power transistor or
computer CPU heat sink) to provide better/faster heat transfer from the
plug threads to the head. Now, I've been messing with IC engines for around
50 years, and while I use anti seize religiously on my Lyc plugs, and
occasionally on other stuff, I've never thought about using thermal paste.
Must have missed a memo at some point in my past.

Recent and recurring discussions about needing colder plugs in high duty
cycle rotaries, including Steve Boese's research several years ago, got me
thinking about connecting the two dots.

Since I'm not flying yet, is there anyone out there who's flying a lot who
thinks it might be worth a shot to see if it will extend the life of their
already cold plugs?

Charlie

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<div dir=3D"ltr">An article in Sport Aviation several months ago (which I j=
ust got around to reading; unusual to find useful info there) talked about =
Rotax&#39;s recommendations for spark plugs in their engines. One thing the=
y require, in addition to using the correct heat range, was the use of ther=
mal conducting paste (similar to what you&#39;d put on a power transistor o=
r computer CPU heat sink) to provide better/faster heat transfer from the p=
lug threads to the head. Now, I&#39;ve been messing with IC engines for aro=
und 50 years, and while I use anti seize religiously on my Lyc plugs, and o=
ccasionally on other stuff, I&#39;ve never thought about using thermal past=
e.=C2=A0 Must have missed a memo at some point in my past.<div><br></div><d=
iv>Recent and recurring discussions about needing colder plugs in high duty=
 cycle rotaries, including Steve Boese&#39;s research several years ago, go=
t me thinking about connecting the two dots.=C2=A0</div><div><br></div><div=
>Since I&#39;m not flying yet, is there anyone out there who&#39;s flying a=
 lot who thinks it might be worth a shot to see if it will extend the life =
of their already cold plugs?</div><div><br></div><div>Charlie</div></div>

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