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From: "Steven W. Boese" <SBoese@uwyo.edu>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: colder spark plugs
Thread-Topic: colder spark plugs
Thread-Index: AQHNo+30icF5kSbnak20R8FLlgunkg==
Date: Sat, 6 Oct 2012 18:12:22 +0000
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David,



Thank you for the compliment.



I have installed a set of the -10 spark plugs and at this point they are lo=
ng past the time where the stock plugs normally needed to be replaced.  How=
 long they will continue to work is unknown, but at least that one data poi=
nt is consistent with the study and encouraging.



Rather than purchasing the expensive thin walled socket, a tool was made to=
 enlarge the spark plug well in the housing so a conventional socket could =
be used.  While not elegant, this was done with the engine in the plane and=
 involved minimal expense.



Steve Boese

RV6A, 1986 13B NA, RD1A, EC2



________________________________
From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of =
David Leonard [wdleonard@gmail.com]
Sent: Saturday, October 06, 2012 10:15 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Rotary Get-Together reminder

Steve, YOU ARE MY HERO!  Rarely outside the realm of paid research taking y=
ears have we come across such a complete, thoughtful, yet succinct expos=E8=
 on any subject.

I have been using the BUR bla bla -9 plugs (stock trailing plugs) on both t=
he leading and trailing applications for a while now with minimal effect if=
 any (they are the coldest stock plugs sold by Mazdatrix).  Makes sense now=
 that I read the Boese law of SAG.  I think it is time to try out some of t=
hese even colder plugs sold by Racingbeat and see if I can get a more than =
25 hrs or so.  Actually, if I just use them in the trailing slot, and the -=
9 stock plugs in the leading slot, it should be just as effective.  The ide=
a being not that I need them cooler when new, but there should be more allo=
wance for core degradation before SAG begins.  Also, running cooler they ma=
y not degrade as quickly.

http://www.racingbeat.com/RX7-1986-1992/Ignition/11547.html

They are not cheap! could go through 4 regular plugs for the price of one o=
f these... and they need a special thin-walled socket to install them and R=
B is charging $81 for those.  Will look around for better prices.

--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

On Fri, Oct 5, 2012 at 3:26 PM, Steven W. Boese <SBoese@uwyo.edu<mailto:SBo=
ese@uwyo.edu>> wrote:

The content of the SAG presentation last weekend at Pocahontis has been add=
ed to the website:



www.rotarycopilot.com<http://www.rotarycopilot.com><http://www.rotarycopilo=
t.com>



as a page labeled "SAG part 2".



The conclusion of the study is that if SAG develops on both rotors of a 13B=
, power to all the ignition coils could shut off and the engine would conti=
nue to run.  This is yet to be tested in flight, however.



The only photos of the event I took are not posted since they were of the c=
horus line of wives.  Sorry, you had to be there.



Steve Boese

RV6A, 1986 13B NA, RD1A, EC2






--_000_3E8191F276108F4481AB0721BBA9269E05CE442Cponyexpressm10u_
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10pt;">
<p>David,</p>
<p>&nbsp;</p>
<p>Thank you for the compliment.</p>
<p>&nbsp;</p>
<p>I have installed a set of the -10 spark plugs and at this point they are=
 long past the&nbsp;time where the stock plugs normally needed to be replac=
ed.&nbsp; How long they will continue to work is unknown, but at least that=
 one data point is consistent with the study
 and encouraging.</p>
<p>&nbsp;</p>
<p>Rather than purchasing the expensive thin walled socket,&nbsp;a tool was=
 made to enlarge the spark plug well in the housing so a conventional socke=
t could be&nbsp;used.&nbsp; While not elegant, this was done with the engin=
e in the plane&nbsp;and involved minimal expense.</p>
<p>&nbsp;</p>
<div>
<p><font size=3D"2" face=3D"Tahoma"><font size=3D"2" face=3D"tahoma">Steve =
Boese</font></p>
<div>
<div><font size=3D"2" face=3D"tahoma">RV6A, 1986 13B NA, RD1A, EC2</font></=
div>
</font></div>
</div>
<p>&nbsp;</p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"DIRECTION: ltr" id=3D"divRpF612807"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> Rotary motors in aircraft [flyrotary=
@lancaironline.net] on behalf of David Leonard [wdleonard@gmail.com]<br>
<b>Sent:</b> Saturday, October 06, 2012 10:15 AM<br>
<b>To:</b> Rotary motors in aircraft<br>
<b>Subject:</b> [FlyRotary] Re: Rotary Get-Together reminder<br>
</font><br>
</div>
<div></div>
<div>Steve, YOU ARE MY HERO!&nbsp; Rarely outside the realm of paid researc=
h taking years have we come across such a complete, thoughtful, yet succinc=
t expos=E8 on any subject.
<br>
<br>
I have been using the BUR bla bla -9 plugs (stock trailing plugs) on both t=
he leading and trailing applications for a while now with minimal effect if=
 any (they are the coldest stock plugs sold by Mazdatrix).&nbsp; Makes sens=
e now that I read the Boese law of SAG.&nbsp;
 I think it is time to try out some of these even colder plugs sold by Raci=
ngbeat and see if I can get a more than 25 hrs or so.&nbsp; Actually, if I =
just use them in the trailing slot, and the -9 stock plugs in the leading s=
lot, it should be just as effective.&nbsp;
 The idea being not that I need them cooler when new, but there should be m=
ore allowance for core degradation before SAG begins.&nbsp; Also, running c=
ooler they may not degrade as quickly.<br>
<br>
<a href=3D"http://www.racingbeat.com/RX7-1986-1992/Ignition/11547.html" tar=
get=3D"_blank">http://www.racingbeat.com/RX7-1986-1992/Ignition/11547.html<=
/a><br>
<br>
They are not cheap! could go through 4 regular plugs for the price of one o=
f these... and they need a special thin-walled socket to install them and R=
B is charging $81 for those.&nbsp; Will look around for better prices.<br>
<br>
-- <br>
David Leonard<br>
<br>
Turbo Rotary RV-6 N4VY<br>
<a href=3D"http://N4VY.RotaryRoster.net" target=3D"_blank">http://N4VY.Rota=
ryRoster.net</a><br>
<a href=3D"http://RotaryRoster.net" target=3D"_blank">http://RotaryRoster.n=
et</a><br>
<br>
<div class=3D"gmail_quote">On Fri, Oct 5, 2012 at 3:26 PM, Steven W. Boese =
<span dir=3D"ltr">
&lt;<a href=3D"mailto:SBoese@uwyo.edu" target=3D"_blank">SBoese@uwyo.edu</a=
>&gt;</span> wrote:<br>
<blockquote style=3D"BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex=
; PADDING-LEFT: 1ex" class=3D"gmail_quote">
<div bgcolor=3D"#ffffff">
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; FONT-SIZE: 10pt">
<p>The content of the SAG presentation last weekend at&nbsp;Pocahontis<a></=
a> has been added to the website:</p>
<p>&nbsp;</p>
<p><a href=3D"http://www.rotarycopilot.com" target=3D"_blank">www.rotarycop=
ilot.com</a><a></a><a href=3D"http://www.rotarycopilot.com" target=3D"_blan=
k"></a></p>
<p>&nbsp;</p>
<p>as a page labeled &quot;SAG part 2&quot;.</p>
<p>&nbsp;</p>
<p>The conclusion of the study is that if SAG develops on both rotors of a =
13B<a></a>, power to all the ignition coils could shut off and the engine w=
ould continue to run.&nbsp; This is yet to be tested in flight, however.</p=
>
<p>&nbsp;</p>
<p>The only photos of the event I took&nbsp;are not posted since&nbsp;they =
were&nbsp;of the chorus line of wives.&nbsp; Sorry, you had to be there.</p=
>
<p>&nbsp;</p>
<div>
<p><font face=3D"Tahoma"><font face=3D"tahoma">Steve Boese<a></a></font></f=
ont></p>
<div>
<div><font face=3D"tahoma"><a></a><font face=3D"tahoma">RV6A</font>, 1986&n=
bsp;13B<a></a> NA, RD1A<a></a>, EC2<a></a></font></div>
</div>
</div>
<p><font size=3D"&#43;1"><font face=3D"Arial"><br>
</font></font>&nbsp;</p>
</div>
</div>
</blockquote>
</div>
<br>
<br clear=3D"all">
<br>
</div>
</div>
</div>
</body>
</html>

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