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Message-ID: <1c23473f050615170278dcad09@mail.gmail.com>
Date: Wed, 15 Jun 2005 17:02:00 -0700
From: David Leonard <wdleonard@gmail.com>
Reply-To: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: turbo oil drain
In-Reply-To: <list-1002364@logan.com>
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 Rusty, you better check with a turbo specialist. The valve could be a just=
=20
> a regular check valve that will open at 1/2 psi. Buly
> Don't worry Buly, whoever sells me the new turbo will be providing plenty=
=20
> of professional advice and support, or they won't be selling me anything.=
 I=20
> also have a lot of research to do, which basically means sitting back and=
=20
> letting Dave or John figure out what works.=20
>  Cheers,
> Rusty (single rotor block sitting on the Kolb mount)
> =20
 Rusty, the "oil seal" is not really so much of a seal as it is a plate tha=
t=20
covers the center section and prevents most of the pressurized exhaust from=
=20
getting into the center section. It is held in place by exhaust pressure.=
=20
Any oil behind it will run freely into the exhaust.

When I first was running my engine I had a -6 aluminum tube in a short=20
portion of the return. I figured (despite what everyone kept saying) that=
=20
would be plenty as there was a 1/16 restrictor on the inlet.... Well, it=20
wasn't. The despite the fact that it was downhill all the way, surface=20
tension in the line must have created just enough back pressure, and the=20
exhaust was full of smoke. I even sent the turbo back to the guy who=20
re-built it saying that the "seal" was broken. He say everything was fine=
=20
and again suggested that my return wasn't big enough... So I broke down, an=
d=20
though I didn't think it would work, I enlarged the entire return to 1/2=20
inch pipe... that fixed the problem.

--=20
Dave Leonard
Turbo Rotary RV-6 N4VY
http://members.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.com/vp4skydoc/index.html

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<br><br>
<div>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><span class=3D"q">
<p><font size=3D"2">Rusty, you better check with a turbo specialist. The va=
lve could be a just a regular check valve that will open at 1/2 psi. Buly</=
font></p></span>
<div><font size=3D"2"><font face=3D"Arial" color=3D"#ff0000" size=3D"3">Don=
't worry Buly, whoever sells me the new turbo will be providing plenty of p=
rofessional advice and support, or they won't be selling me anything.&nbsp;=
 I also have a lot of research to do, which basically means sitting back an=
d letting Dave or John figure out what works.&nbsp;=20
</font></font></div>
<div><font size=3D"2"><font face=3D"Arial" color=3D"#ff0000" size=3D"3"></f=
ont></font>&nbsp;</div>
<div><font size=3D"2"><font face=3D"Arial" color=3D"#ff0000" size=3D"3">Che=
ers,</font></font></div>
<div><font size=3D"2"><font face=3D"Arial" color=3D"#ff0000" size=3D"3">Rus=
ty (single rotor block sitting on the Kolb mount)</font></font></div>
<div><font size=3D"2"><font face=3D"Arial" color=3D"#ff0000" size=3D"3"></f=
ont>&nbsp;</font></div></blockquote></div>
<div>&nbsp;</div>
<div>Rusty, the &quot;oil seal&quot; is not really so much of a seal as it =
is a plate that covers the center section and prevents most of the pressuri=
zed exhaust from getting into the center section.&nbsp; It is held in place=
 by exhaust pressure.&nbsp; Any oil behind it will run freely into the exha=
ust.
</div>
<div><br>When I first was running my engine I had a -6 aluminum tube in a s=
hort portion of the return.&nbsp; I figured (despite what everyone kept say=
ing)&nbsp;that would be plenty as there was a 1/16 restrictor on the inlet.=
...&nbsp; Well, it wasn't.&nbsp; The despite the fact that it was downhill =
all the way, surface tension in the line must have created just enough back=
 pressure, and the exhaust was full of smoke.&nbsp; I even sent the turbo b=
ack to the guy who re-built it saying that the &quot;seal&quot; was broken.=
&nbsp;&nbsp;He say everything was fine and again suggested that my return w=
asn't big enough...&nbsp; So I broke down, and though I didn't think it wou=
ld work, I enlarged the entire return to 1/2 inch pipe...&nbsp; that fixed =
the problem.
<br><br>-- <br>Dave Leonard<br>Turbo Rotary RV-6 N4VY<br><a href=3D"http://=
members.aol.com/_ht_a/rotaryroster/index.html">http://members.aol.com/_ht_a=
/rotaryroster/index.html</a><br><a href=3D"http://members.aol.com/vp4skydoc=
/index.html">
http://members.aol.com/vp4skydoc/index.html</a> </div>

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