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Date: Fri, 4 Sep 2009 14:53:07 -0400
Message-ID: <1ab24f410909041153j659f89a6pdb6299e7256873e0@mail.gmail.com>
Subject: Side seals and oil scrapers
From: Lynn Hanover <lehanover@gmail.com>
To: flyrotary@lancaironline.net
Content-Type: multipart/alternative; boundary=001485f27bfcbf63870472c50225

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Tracy, Yvon Group,
       Had not considered 2 stroke buildup in sump from that angle
Tracy...........Are rotor side seals
there to keep sump oil out of the combustion chamber , help contain
compression , or a combination
of both..............I theorized that warn seals and "O" rings would allow
excess 2 stroke oil past them
by essentially riding over the oil film  (hydroplaning) at high
rpm.............
--
Kelly Troyer

All of the world is a unit pressure problem.

Racing oil scrapers are ground at a steeper angle, so as to generate a
higher unit pressure with a single spring. The stock scrapers work just fine
if installed as new, And the springs are installed for the correct side of
the rotor. The springs are handed, and there are front and back springs. The
correct spring locks the scraper to the rotor, so they turn as one. The
incorrect spring allows the scraper to rotate in its groove, and wear out
the "O" ring. The scrapers have no end gaps.

The side seals have a minimum end gap at one end. Usually .004" is the wear
limit. I set mine at zero.

If the corner seal and side seal will return when depressed together, I
regard that as adequate.

Side seals do not control oil. Just compression. The corner seal pushes one
side seal each around the iron, and generally only wear on one end. Note
that corner seals have a wear mark where the side seal touches.

Renesis side seals need more clearance to allow for exhaust heat on the
rotor sides.

Lynn E. Hanover

--001485f27bfcbf63870472c50225
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div>Tracy, Yvon=A0Group,</div>
<div>=A0=A0=A0=A0=A0=A0 Had not considered 2 stroke buildup in sump from th=
at angle Tracy...........Are rotor=A0side seals</div>
<div>there to keep sump oil out of the combustion chamber , help contain co=
mpression , or a combination</div>
<div>of both..............I theorized that warn seals and &quot;O&quot; rin=
gs would allow excess 2 stroke oil past them</div>
<div>by essentially riding over the oil film=A0 (hydroplaning) at high rpm.=
............=A0</div>
<div id=3D"signature" class=3D"signature">--<br>Kelly Troyer <br></div>
<div class=3D"signature">=A0</div>
<div class=3D"signature">All of the world is a unit pressure problem.</div>
<div class=3D"signature">=A0</div>
<div class=3D"signature">Racing oil scrapers are ground at a steeper angle,=
 so as to generate a higher unit pressure with a single spring. The stock s=
crapers work just fine if installed as new, And the springs are installed f=
or the correct side of the rotor. The springs are handed, and there are fro=
nt and back springs. The correct spring locks the scraper to the rotor, so =
they turn as one. The incorrect spring allows the scraper to rotate in its =
groove, and wear out the &quot;O&quot; ring. The scrapers=A0have no end gap=
s.=A0</div>

<div class=3D"signature">=A0</div>
<div class=3D"signature">The side seals have a minimum end gap at one end. =
Usually .004&quot; is the wear limit. I set mine at zero.</div>
<div class=3D"signature">=A0</div>
<div class=3D"signature">If the corner seal and side seal will return when =
depressed together, I regard that as adequate.=A0</div>
<div class=3D"signature">=A0</div>
<div class=3D"signature">Side seals do not control oil. Just compression. T=
he corner seal pushes one side seal each around the iron, and generally onl=
y wear on one end. Note that corner seals have a wear mark where the side s=
eal touches.=A0</div>

<div class=3D"signature">=A0</div>
<div class=3D"signature">Renesis side seals need more clearance=A0to allow =
for exhaust heat on the rotor sides.</div>
<div class=3D"signature">=A0</div>
<div class=3D"signature">Lynn E. Hanover</div>

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