Date: Mon, 01 Aug 2005 22:06:34 -0400
From: Finn Lassen <finn.lassen@verizon.net>
Subject: Re: [FlyRotary] Apex seal wear
In-reply-to: <list-621746@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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It may take quite a while for "Tracy's" new seals to wear in. They wear 
slower than the stock seals.
However, your wear looks quite minimal. How is the wear on the sides of 
the seals (where they wear against the rotor groove), and how worn down 
are they? If they are well within specs you might consider reusing them.

The only disadvantage of using new seals is it may take a while (100s of 
hours?) to get perfect compression.
Mine is slowly, slowly improving, but then I had rather deep grooves in 
the rotor housing edges (maybe 1/16" by 1/32").

Finn

sboese wrote:

>List members,
>
>I tore down my running 1986 NA 13B to check for wear as part of the final
>assembly of my RV-6A.  A picture of two apex seals is attached.  The total
>clearance between the apex seals with the ends touching is 0.006", 0.003"
>from each seal.  This is typical of all the apex seals.  The rotor housings
>appear to be worn on the edges to match the end portions of the apex seals
>and this is the only apparent wear to be seen on them.  Is this a normal
>wear pattern?  Will new seals (Tracy's new seals in particular) seat to the
>rotor housings?
>
>Thanks for any advice you may give.
>
>Steve Boese
>RV6A, 86NA13B, EC2, RD1A, Wyoming
>
>  
>