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Date: Sun, 20 Sep 2009 09:34:56 -0600
From: Bob White <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Another mixed day out at the hangar
Message-Id: <20090920093456.7b1ebba4.bob@bob-white.com>
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On Sun, 20 Sep 2009 10:05:30 -0500
"MONTY ROBERTS" <montyr2157@windstream.net> wrote:

<snip>
 Two problems: Pipe threads are terrible and I hate Teflon tape
because it is a pain in the ass, leaks, and the shreds can get into
delicate stuff and clog/break things. 
<snip>

> I HATE TEFLON TAPE!!!!
> 
> I HATE PIPE THREADS!!!

> Good luck.
> 
> Monty
> 
I'm not recommending Teflon tape in this application because of the
shredding problem, but it is useful and works well in other
applications.  I will admit that I did use Teflon tape a in a couple of
places when installing the rotary in the plane.  It was handy and the
shredding problem mostly occurs on reassembly after disassembly.

Some time ago (years) I mentioned to someone (don't remember who or
where) about the problems I had getting Teflon tape to seal pipe
threads.  He asked me how many times I wrapped the tape around the
threads.  "Two or three" I said.  "Use at least 6 layers" he said.  I
haven't had a problem sealing pipe threads with Teflon tape since.
I've also had good luck with a Teflon based pipe dope which doesn't
have the shredding problem.   I used Hylomar on a lot of the pipe thread
joints when I put the engine in the car.  I haven't seen any leaks yet,
but haven't ran the engine either.  First start is coming up soon.

Bob W. 


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