Mailing List flyrotary@lancaironline.net Message #29912
From: BillDube@killacycle.com <billdube@killacycle.com>
Subject: Re: [FlyRotary] Re: Assembly sealant
Date: Thu, 02 Feb 2006 22:24:52 -0700
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
I put in threads for three jacking screws (3/8"-16). I have yet to run the engine or attempt to disassemble, however.

        Here is a picture. The circle is the OD of the PSRU housing. The three tapped holes are toward the outer edge. Appears to be plenty of sealing area inward of these holes. I chamfered the holes so there were no burrs or protrusions to hold the PSRU housing away from the plate surface.

        We shall see how it works. I figure I can put in set screws with pipe dope if any of the holes leak oil.

Bill Dube'

At 12:20 PM 2/2/2006, you wrote:
In a message dated 2/1/2006 10:25:12 PM Pacific Standard Time, bobperk@bellsouth.net writes:
Has anyone used silk thread between the mounting plate and the gear housing
without using sealant?  And would this cause a problem?

Bob Perkinson
Hendersonville, TN.
RV9 N658RP Reserved
If nothing changes
Nothing changes
Bob,
This is a tecnique used on Lycs' with poor case castings, WITH SEALANT. I would suggest that if you have GOOD castings/plates the thread will do more harm than good! Modern motorcycles with good castings use nothing but sealer ALWAYS. Yes Buly it can be a bi*#h to get off. The bike cases have frequently included a couple of jacking screws in an area with plenty of seal area.
Bill Jepson
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