[NSRCA-discussion] Header coupler

[Paul LaChance]

George,

I had similar problems back when I fly old ys 60's.  I used the green heater 
hose for trucks.  Had reinforcing and lasted very well, but was heavy 
compared to anything else you can use.  Try a good auto parts store or a 
commercial truck parts or repair facility.

Paul
----- Original Message ----- 
From: <glmiller3 at suddenlink.net>
To: "NSRCA List" <nsrca-discussion at lists.nsrca.org>
Sent: Monday, June 01, 2009 6:07 PM
Subject: [NSRCA-discussion] Header coupler


> Hello all.
>
> I need to tap the collective expertise here on the web.
>
> As some of you know, I've been working on a gas conversion of an OS 
> 160....it is running very well and I'm quite happy with the 
> weight/performance and ease of use.
>
> BUT I'm having a problem with the muffler coupling.
>
> I'm using a Mueller header and an aeroslave carbon pipe.....the header has 
> a 3/4 in outer diameter.
>
> My first coupling material was teflon tubing from McMasterCarr...the 
> "thick walled" 3/4 inch ID tubing...
>
> This held up pretty well as long as I had the space between the coupled 
> pipes very small...but I was getting contact between the pipes (that was 
> the metal "tinging" that you were hearing, Lance)..which eventually caused 
> a burr on the tube and resulted in a hole in the coupling.....So I made 
> the gap a little wider 1/4 inch or so and now the teflon coupler is 
> melting through in a flight or two.....so I need an alternative material.
>
> I remember that we used to use a thick silicone coupling material for 
> helicopter header/muffler connections but I can't find it anymore...Surely 
> someone here has some ideas and a source where I can get it.
>
> Let's hear it!
>
> Thanks in advance,
>
> George Miller
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