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From: "Tracy Crook" <lors01@msn.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-930932@logan.com>
Subject: Re: [FlyRotary] Re: Coil & Alt cooling, Buly's input shaft
Date: Fri, 20 Jan 2006 13:10:20 -0500
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Buly,  You may be correct about the .027" error causing the problem and =
I hope that is true. =20
But,  The key phrase here is "centered as the original transmission gear =
box".  Is the transmission bolt circle concentric with the crankshaft?  =
Is the transmission input shaft concentric with the bolt circle?  They =
might be (I have not checked) but there is no rule saying they have to =
be.  For example, the RX-7 starter looks as if the pinion is concentric =
with the starter pilot and pilot hole that it mounts in.  It is not. =20

Tracy=20

----- Original Message -----=20
  From: Bulent Aliev<mailto:atlasyts@bellsouth.net>=20
  To: Rotary motors in aircraft<mailto:flyrotary@lancaironline.net>=20
  Sent: Tuesday, January 17, 2006 11:49 PM
  Subject: [FlyRotary] Re: Coil & Alt cooling, Buly's input shaft


  Tracy,
  I picked up the resurfaced assembly today, and the machinist told me =20
  that one end to the other of the gear box contact surface was .027 =
off.
  I removed the original automatic transmission gear box from the =20
  bellhousing and replaced it with my new mounting plate. So everything  =

  was centered as the original transmission gear box. All the mounting =20
  bolt holes were match drilled. With the extra long shaft, .027  will =20
  give quite difference at both ends of the shaft.
  I don't see anything else to check?
  Buly


  > Input shaft
  >
  > Buly, got your input shaft today and checked it out.  The thrust =20
  > bearing rollers & races look a little stressed but the roller cage =20
  > has been completely trashed.  I do not think the .005" out of =20
  > flatness on your bellhousing would explain this and the odd wear =20
  > pattern on the plate.  The marks and discoloration (heat) on the =20
  > bearing and shaft look as if there is misalignment between the E-=20
  > shaft  and the gear drive.  When you built the plate & bellhousing =20
  > adapter for the drive, how did you verify concentricity?  This is =20
  > much harder to do than verifying the parallelism of the bellhousing  =

  > and plate but is absolutely vital.  There is no question that the =20
  > drive would have soon failed if you had continued to run it.   Glad  =

  > this showed up before flight.
  >
  > Tracy  (Happy to hear that Dave L. is safe!  Good flying. )
  > <coil-alt coolingA.jpg>
  > --


  --
  Homepage:  http://www.flyrotary.com/<http://www.flyrotary.com/>
  Archive and UnSub:   =
http://mail.lancaironline.net/lists/flyrotary/<http://mail.lancaironline.=
net/lists/flyrotary/>

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<DIV>
<DIV>Buly,&nbsp; You may be correct about the .027" error causing the =
problem=20
and I hope that is true.&nbsp; </DIV>
<DIV>But,&nbsp; The key phrase here is "centered as the original =
transmission=20
gear box".&nbsp; Is the transmission bolt circle concentric with the=20
crankshaft?&nbsp; Is the transmission input shaft concentric with the =
bolt=20
circle?&nbsp; They might be (I have not checked) but there is no rule=20
saying&nbsp;they have to be.&nbsp; For example, the RX-7 starter =
<U>looks</U> as=20
if the pinion is concentric with the starter pilot and pilot hole that =
it mounts=20
in.&nbsp; It is not.&nbsp; </DIV>
<DIV>&nbsp;</DIV>
<DIV>Tracy </DIV>
<DIV>&nbsp;</DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial"><B>From:</B> <A=20
  title=3Dmailto:atlasyts@bellsouth.net=20
  href=3D"mailto:atlasyts@bellsouth.net">Bulent Aliev</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
  title=3Dmailto:flyrotary@lancaironline.net=20
  href=3D"mailto:flyrotary@lancaironline.net">Rotary motors in =
aircraft</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, January 17, 2006 =
11:49=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [FlyRotary] Re: Coil =
&amp; Alt=20
  cooling, Buly's input shaft</DIV>
  <DIV><BR></DIV>Tracy,<BR>I picked up the resurfaced assembly today, =
and the=20
  machinist told me&nbsp; <BR>that one end to the other of the gear box =
contact=20
  surface was .027 off.<BR>I removed the original automatic transmission =
gear=20
  box from the&nbsp; <BR>bellhousing and replaced it with my new =
mounting plate.=20
  So everything&nbsp; <BR>was centered as the original transmission gear =
box.=20
  All the mounting&nbsp; <BR>bolt holes were match drilled. With the =
extra long=20
  shaft, .027&nbsp; will&nbsp; <BR>give quite difference at both ends of =
the=20
  shaft.<BR>I don't see anything else to check?<BR>Buly<BR><BR><BR>&gt; =
Input=20
  shaft<BR>&gt;<BR>&gt; Buly, got your input shaft today and checked it=20
  out.&nbsp; The thrust&nbsp; <BR>&gt; bearing rollers &amp; races look =
a little=20
  stressed but the roller cage&nbsp; <BR>&gt; has been completely =
trashed.&nbsp;=20
  I do not think the .005" out of&nbsp; <BR>&gt; flatness on your =
bellhousing=20
  would explain this and the odd wear&nbsp; <BR>&gt; pattern on the =
plate.&nbsp;=20
  The marks and discoloration (heat) on the&nbsp; <BR>&gt; bearing and =
shaft=20
  look as if there is misalignment between the E- <BR>&gt; shaft&nbsp; =
and the=20
  gear drive.&nbsp; When you built the plate &amp; bellhousing&nbsp; =
<BR>&gt;=20
  adapter for the drive, how did you verify concentricity?&nbsp; This =
is&nbsp;=20
  <BR>&gt; much harder to do than verifying the parallelism of the=20
  bellhousing&nbsp; <BR>&gt; and plate but is absolutely vital.&nbsp; =
There is=20
  no question that the&nbsp; <BR>&gt; drive would have soon failed if =
you had=20
  continued to run it.&nbsp;&nbsp; Glad&nbsp; <BR>&gt; this showed up =
before=20
  flight.<BR>&gt;<BR>&gt; Tracy&nbsp; (Happy to hear that Dave L. is =
safe!&nbsp;=20
  Good flying. )<BR>&gt; &lt;coil-alt coolingA.jpg&gt;<BR>&gt;=20
  --<BR><BR><BR>--<BR>Homepage:&nbsp; <A =
title=3Dhttp://www.flyrotary.com/=20
  =
href=3D"http://www.flyrotary.com/">http://www.flyrotary.com/</A><BR>Archi=
ve and=20
  UnSub:&nbsp;&nbsp; <A =
title=3Dhttp://mail.lancaironline.net/lists/flyrotary/=20
  =
href=3D"http://mail.lancaironline.net/lists/flyrotary/">http://mail.lanca=
ironline.net/lists/flyrotary/</A><BR></BLOCKQUOTE></DIV></BODY></HTML>

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