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Subject: RE: [FlyRotary] Re: Soft Seals Sloppy slots  S^4
Date: Fri, 13 May 2005 05:51:39 -0500
Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E6CB6B1@MAIL01.austin.utexas.edu>
Thread-Topic: [FlyRotary] Re: Soft Seals Sloppy slots  S^4
Thread-Index: AcVXPzJ13oWiACfUSqevq+jBOnni+QAabdfk
From: "Mark R Steitle" <mark.steitle@austin.utexas.edu>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

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George,
I'm waiting to hear Tracy's opinion on the hardness testing.  My rotors =
were freshly ground for the 3mm seals, so the clearances are good.  To =
put my mind at rest, I suppose I'll have to check them (through the =
exhaust ports) at regular intervals.

Mark


-----Original Message-----
From: Rotary motors in aircraft on behalf of George Lendich
Sent: Thu 5/12/2005 5:12 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Soft Seals Sloppy slots  S^4
=20
MessageMark,
I am behind in my mail but feel had to respond.
I have a feeling that the Hurley Seals are pretty good, as they are the =
seal of choice by many local Aussie rebuilders - however may suffer =
premature wear, in older rotors with worn apex seal grooves, where the =
wear hasn't been recognised before rebuild, as in Ed's case.
George( down under)

Rusty,
  =20

  Just to let you know where I'm coming from on this.  First, I have 3mm =
Hurley seals installed in my 20B, and don't relish the thought of =
tearing it apart to change out the apex seals.  (At the time I was =
rebuilding my engine, Hurley seals were the seal of choice.)  If they =
actually are too soft, then I would like to know about it now, not after =
they ruin my day.  The comment was made that Hurley seals are so soft =
that they are wearing out pre-maturely.  It would be a good yardstick to =
have the numbers on the stock Mazda seals as well to use as a reference =
point to know how the Hurley seals compare.

  =20

  Mark   =20

  =20


-------------------------------------------------------------------------=
-----

  From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] =
On Behalf Of Russell Duffy
  Sent: Monday, April 25, 2005 1:30 PM
  To: Rotary motors in aircraft
  Subject: [FlyRotary] Re: Soft Seals Sloppy slots S^4

  =20

  Rusty, Mark

  I have access to the equipment to perform a Rockwell Hardness test.  =
If you want you can send the old seals to me and I could have the test =
run the day after I receive them.  Let me know .

  =20

  Hi Bob,

  =20

  If Ed wants to send a piece of his broken seal, I'm certainly game to =
send one of my seals also.  I'm not really sure what we'll prove by =
this, other than finding out if Ed's seal was sub-Hurley-standard =
hardness.  We don't know what hardness is required, or desired, so =
having a figure for the standard Hurley wouldn't seem to serve any =
purpose to me.    =20

  =20

  BTW Ed, I would absolutely not install those odd plugs until you get =
home.  It certainly sounds like they weren't hitting anything, but do =
you know that the ground electrode wasn't glowing red, and causing =
pre-ignition, or causing some other odd problem that we don't =
understand?  Even if you don't believe those plugs will cause any =
problems at all, why take even a slight chance until you get home and =
can circle your own field for testing?

  =20

  Rusty

    =20

  =20

  =20


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