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Message-ID: <1c23473f0602110912y37e7d658j938aec2e2be0d7b4@mail.gmail.com>
Date: Sat, 11 Feb 2006 09:12:55 -0800
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Engine Apart
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I finally took the engine apart yesterday.

As expected, there was not coolant left in the engine - it all boiled out!
The rotor housings were very toast, having melted around the leading plug
hole.  They also shrank about .015 in that area and left an aluminum coatin=
g
on the inner surface.  Even one of the tension bolts had to be pounded out
because the passage melted shut!  The tefflon o-rings were intact except fo=
r
a 5-inch section through the hottest area of combustion.

All apex and side seals were still in their place.  The apex seals were a
little damaged from going over the melted aluminium.

The bearings are a little rough and will have to be replaced, but the
e-shaft is undamaged.  The rotors are usable.  The end housings all got
severly blued in the hottest area.  Does anyone know the significance of
that?  Can they be used?

There were no broken tension bolts or leaks in the cooling system big enoug=
h
to find.  So basically enough of it squirted out the top to expose the wate=
r
pump, then melt-down occured.

Live and learn I guess.

Will take some pictures...
--
Dave Leonard
Turbo Rotary RV-6 N4VY
http://members.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.com/_ht_a/vp4skydoc/index.html

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<div>I finally took the engine apart yesterday.</div>
<div>&nbsp;</div>
<div>As expected, there was not coolant left in the engine - it all boiled =
out!&nbsp; The rotor housings were very toast, having melted around the lea=
ding plug hole.&nbsp; They also shrank about .015 in that area and left an =
aluminum coating on the inner surface.&nbsp; Even one of the tension bolts =
had to be pounded out because the passage melted shut!&nbsp; The tefflon o-=
rings were intact except for a 5-inch section through the hottest area of c=
ombustion.
</div>
<div>&nbsp;</div>
<div>All apex and side seals were still in their place.&nbsp; The apex seal=
s were a little damaged from going over the melted aluminium.</div>
<div>&nbsp;</div>
<div>The bearings are a little rough and will have to be replaced, but the =
e-shaft is undamaged.&nbsp; The rotors are usable.&nbsp; The end housings a=
ll got severly blued in the hottest area.&nbsp; Does anyone know the signif=
icance of that?&nbsp; Can they be used?
</div>
<div>&nbsp;</div>
<div>There were no broken tension bolts or leaks in the cooling system big =
enough to find.&nbsp; So basically enough of it squirted out the top to exp=
ose the water pump, then melt-down occured.</div>
<div>&nbsp;</div>
<div>Live and learn I guess.</div>
<div>&nbsp;</div>
<div>Will take some pictures...<br>-- <br>Dave Leonard<br>Turbo Rotary RV-6=
 N4VY<br><a href=3D"http://members.aol.com/_ht_a/rotaryroster/index.html">h=
ttp://members.aol.com/_ht_a/rotaryroster/index.html</a><br><a href=3D"http:=
//members.aol.com/_ht_a/vp4skydoc/index.html">
http://members.aol.com/_ht_a/vp4skydoc/index.html</a> </div>

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