From: "Steven W. Boese" <flyrotary@lancaironline.net>
Received-SPF: none
 receiver=logan.com; client-ip=104.47.40.109; envelope-from=SBoese@uwyo.edu
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: cold spark plugs
Thread-Topic: cold spark plugs
Thread-Index: AQHSHmM8K/mbYEmoiUSkHkk2t4Qi4A==
Date: Tue, 4 Oct 2016 17:29:19 +0000
Message-ID: <CY1PR05MB2201D5A3D57C29CA1DCC714AB9C50@CY1PR05MB2201.namprd05.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: uwyo.edu does not designate
 permitted sender hosts)
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: multipart/alternative;
	boundary="_000_CY1PR05MB2201D5A3D57C29CA1DCC714AB9C50CY1PR05MB2201namp_"
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Oct 2016 17:29:19.6196
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: f9cdd7ad-825d-4601-8e9c-a325e02d52da
X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR05MB2201

--_000_CY1PR05MB2201D5A3D57C29CA1DCC714AB9C50CY1PR05MB2201namp_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Charlie,


I meant to reply to your message a long time ago.  I don't know what effect=
 thermal paste on the spark plug threads would have.  As long as it doesn't=
 cause galling of the aluminum rotor housing, I don't see how it would hurt=
.


Having replaced the BR10EIX spark plugs after 180 hours of use with no indi=
cation of problems during that time, it appears that the lifetime of those =
plugs is at least an order of magnitude greater than what I was getting fro=
m the stock spark plugs.  91 octane non alcohol automotive fuel was used ex=
clusively during that time.


Steve Boese
RV6A, 1986 13B NA, RD1A, EC2


From:   Charlie England <flyrotary@lancaironline.net>
Subject:        Chilled spark plugs: Thermal paste?
Date:   Sat, 20 Aug 2016 08:30:03 -0500
To:     Rotary motors in aircraft <flyrotary@lancaironline.net>
        [Message Header] <http://lancaironline.net/lists/flyrotary/Message/=
62750-H.txt>

[Undecoded Message]<http://lancaironline.net/lists/flyrotary/Message/62750-=
P.txt>

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 recommend=
ations for spark plugs in their engines. One thing they require, in additio=
n 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 so=
me point in my past.

Recent and recurring discussions about needing colder plugs in high duty cy=
cle rotaries, including Steve Boese's research several years ago, got me th=
inking 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


--_000_CY1PR05MB2201D5A3D57C29CA1DCC714AB9C50CY1PR05MB2201namp_
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<style type=3D"text/css" style=3D"display:none;"><!-- P {margin-top:0;margi=
n-bottom:0;} --></style>
</head>
<body dir=3D"ltr">
<div id=3D"divtagdefaultwrapper" style=3D"font-size:12pt;color:#000000;font=
-family:Calibri,Arial,Helvetica,sans-serif;">
<p>Charlie,</p>
<p><br>
</p>
<p>I meant to reply to your message a long time ago.&nbsp; I don't know wha=
t effect thermal paste on the spark plug threads would have.&nbsp; As long =
as it doesn't cause galling of the aluminum rotor housing, I don't see how =
it would hurt.</p>
<p><br>
</p>
<p>Having replaced the BR10EIX spark plugs after 180 hours of use with no i=
ndication of problems during that time, it appears that the lifetime of tho=
se plugs is at least an order of magnitude greater than what I was getting =
from the stock spark plugs.&nbsp; 91
 octane non alcohol automotive fuel was used exclusively during that time.<=
/p>
<p><br>
</p>
<div id=3D"Signature">
<div><font face=3D"Tahoma" size=3D"2">
<div><font face=3D"tahoma" size=3D"2">Steve Boese</font></div>
<div><font face=3D"tahoma" size=3D"2">RV6A, 1986 13B NA, RD1A, EC2</font></=
div>
</font></div>
</div>
<p><br>
</p>
<p>
<table width=3D"100%" class=3D"messageData" border=3D"0" cellspacing=3D"0" =
cellpadding=3D"0">
<tbody>
<tr>
<td>
<table width=3D"100%" class=3D"rfcheader" cellspacing=3D"0">
<tbody>
<tr valign=3D"top">
<td width=3D"100%">
<table class=3D"rfcheaderfields">
<tbody>
<tr>
<td class=3D"rfcfieldname">From:</td>
<td class=3D"rfcfieldvalue">Charlie England &lt;flyrotary@lancaironline.net=
&gt;</td>
</tr>
<tr>
<td class=3D"rfcfieldname">Subject:</td>
<td class=3D"rfcfieldvalue">Chilled spark plugs: Thermal paste?</td>
</tr>
<tr>
<td class=3D"rfcfieldname">Date:</td>
<td class=3D"rfcfieldvalue">Sat, 20 Aug 2016 08:30:03 -0500</td>
</tr>
<tr>
<td class=3D"rfcfieldname">To:</td>
<td class=3D"rfcfieldvalue">Rotary motors in aircraft &lt;flyrotary@lancair=
online.net&gt;</td>
</tr>
</tbody>
</table>
</td>
<td align=3D"center" class=3D"rfcheaderlinks"><a id=3D"LPlnk708242" href=3D=
"http://lancaironline.net/lists/flyrotary/Message/62750-H.txt" target=3D"_b=
lank" previewremoved=3D"true"><img style=3D"-ms-user-select: none;" alt=3D"=
Message Header" border=3D"0" src=3D"http://lancaironline.net/TextHeaders.gi=
f"></a><br>
<br>
<a id=3D"LPlnk432404" href=3D"http://lancaironline.net/lists/flyrotary/Mess=
age/62750-P.txt" target=3D"_blank" previewremoved=3D"true"><img style=3D"-m=
s-user-select: none;" alt=3D"Undecoded Message" border=3D"0" src=3D"http://=
lancaironline.net/TextLetter.gif"></a>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td>
<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's recommendations for spark plugs in their engines. One thing they re=
quire, 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/fas=
ter 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 o=
n other stuff, I've never thought about using thermal paste.&nbsp; Must hav=
e missed a memo at some point in my past.
<div><br>
</div>
<div>Recent and recurring discussions about needing colder plugs in high du=
ty cycle rotaries, including Steve Boese's research several years ago, got =
me thinking about connecting the two dots.&nbsp;</div>
<div><br>
</div>
<div>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 t=
heir already cold plugs?</div>
<div><br>
</div>
<div>Charlie</div>
</div>
</td>
</tr>
</tbody>
</table>
<br>
</p>
</div>
</body>
</html>

--_000_CY1PR05MB2201D5A3D57C29CA1DCC714AB9C50CY1PR05MB2201namp_--