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Message-ID: <1ab24f410806080937j394992e4sf0827bf3de17cc5@mail.gmail.com>
Date: Sun, 8 Jun 2008 12:37:53 -0400
From: "Lynn Hanover" <lehanover@gmail.com>
To: flyrotary@lancaironline.net
Subject: Ceramic Seals
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The ceramics are one piece. Kind of brownish in color and very light. They
will probably have two springs under each one. Carbons are also one piece,
but bluish grey in color. A bit heavier than the ceramics, one have one
spring.

The ceramics are the gold standard of seals. Stronger than any steel seal
and nearly no wear on the chrome. I would leave them in.

Lynn E. Hanover


Lynn=97

                I have a 13B NA which has previously been converted to
propane by Rotary International Enterprises (?) and has to be reconverted t=
o
mogas/avgas.   It allegedly has 17 hours of runtime on it and also was
claimed to have been rebuilt using "ceramic seals".  When we do a tear down
on it for inspection, at the risk of sounding totally na=EFve, how do we
ascertain that it truly *does* have ceramic seals on it and would you
recommend that we simply just go ahead and replace them with more
traditional seals regardless?  (Comments from not only you but also anyone
else would be greatly appreciated.)



Paul Vermillion

(partially completed BD-4)

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<div class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FO=
NT-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;">The ceramics are one pie=
ce. Kind of brownish in color and very light. They will probably have two s=
prings under each one. Carbons are also one piece, but bluish grey in color=
. A bit heavier than the ceramics, one have one spring. </span></div>

<div class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FO=
NT-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;"></span>&nbsp;</div>
<div class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FO=
NT-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;">The ceramics are the gol=
d standard of seals. Stronger than any steel seal and nearly no wear on the=
 chrome. I would leave them in. </span></div>

<div class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FO=
NT-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;"></span>&nbsp;</div>
<div class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FO=
NT-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;">Lynn E. Hanover</span></=
div>
<div class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FO=
NT-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;"></span>&nbsp;</div>
<div class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FO=
NT-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;"></span>&nbsp;</div>
<div class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FO=
NT-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;">Lynn=97</span></div>
<p class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FONT=
-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;">&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I have a 1=
3B NA which has previously been converted to propane by Rotary Internationa=
l Enterprises (?) and has to be reconverted to mogas/avgas.&nbsp; &nbsp;It =
allegedly has 17 hours of runtime on it and also was claimed to have been r=
ebuilt using "ceramic seals".&nbsp; When we do a tear down on it for inspec=
tion, at the risk of sounding totally na=EFve, how do we ascertain that it =
truly <u>does</u> have ceramic seals on it and would you recommend that we =
simply just go ahead and replace them with more traditional seals regardles=
s?&nbsp; (Comments from not only you but also anyone else would be greatly =
appreciated.)</span></p>

<p class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FONT=
-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FONT=
-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;">Paul Vermillion</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-SIZE: 11pt; COLOR: #1f497d; FONT=
-FAMILY: &#39;Calibri&#39;,&#39;sans-serif&#39;">(partially completed BD-4)=
</span></p>

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