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<div> <font size="2"><font face="Arial, Helvetica, sans-serif">George, here're a couple tips for you and others who are using wet power systems<br>
<br>
Try the fiberglass tape from Mcmaster Carr. Specifically, it's a teflon impregnated glass tape with silicone adhesive. I peel off around a 10" long piece and simply wrap it on to make the coupler. It's about 3 wraps of material, with a total thickness of around 15 thou give or take. <br>
<br>
I haven't run mine for very long so don't know longevity but so far it's holding up well. I use tie wraps on the ends of the 2" long coupler to keep the ends from being blown by the prop blast.<br>
<br>
If the header is a different diameter than the pipe stem, build the smaller up to make the dias equal, then wrap the coupler around that. Absolutely no chance of blowing the pipe off with the adhesive used. BTW, the materials used are all high temp resistant so if you need to remove it, simply peel it off since silicone will not bond to the teflon impregnation.<br>
<br>
If you decide to wrap it over silicone rubber coupler to reinforce the coupler, the silicone rubber adhesive will bond with the coupler at the temperatures we run making a nearly bullet proof coupler for glow applications.<br>
<br>
They also carry Teflon tape with the silicone adhesive in various widths. This works also but needs more wraps. Many years ago I worked for one company where I actually developed the teflon/adhesive combination of materials. Now it's a commodity<br>
<br>
MattK<br>
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<div style="font-family: helvetica,arial; font-size: 10pt; color: black;">-----Original Message-----<br>
From: glmiller3@suddenlink.net<br>
To: General pattern discussion <nsrca-discussion@lists.nsrca.org><br>
Sent: Sun, Dec 13, 2009 10:47 am<br>
Subject: Re: [NSRCA-discussion] Gas pattern options<br>
<br>
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<pre style="font-size: 9pt;"><tt>Carl,<br>
<br>
I'm experimenting with a gas conversion OS160 using an Aeroslave pipe. Lance <br>
says the pipe isn't "built for gas temperatures" but so far I've had more <br>
trouble with headers and couplers...pipe seems to be holding up fine. <br>
<br>
I hope I'm through the learning curve with this system and can fly it next <br>
season competitively. It doesn't have the "stupid power" that a YS 170 does, <br>
but Mark Hunt has flown the P9 sequence with it and it I think his assessment <br>
was that the power was adequate. Perhaps he'll chime in here. The power is <br>
certainly plenty for the Advanced sequence that I'm flying.<br>
<br>
George<br>
<br>
---- <a href="mailto:CHV69@aol.com">CHV69@aol.com</a> wrote: <br>
<br>
=============<br>
How about sound? Are we able to use the existing carbon fiber pipes <br>
available now like the Aeroslave and ES pipes with the gasoline engines? Or are <br>
<br>
specially made pipes required?<br>
<br>
Carl<br>
<br>
<br>
In a message dated 12/13/2009 9:31:36 A.M. Eastern Standard Time, <br>
<a href="mailto:vicenterc@comcast.net">vicenterc@comcast.net</a> writes:<br>
<br>
Correct. However, fuel cost would make a difference if we could use <br>
gasoline. After my experience, I don't think gasoline engines available in <br>
that <br>
time were viable option for pattern for higher classes. However, it could <br>
work for lower classes. I am not sure what gasoline engines manufacturers <br>
are offering to increase power today. Gasoline engines for sure are more <br>
reliable in the low run than glow engines. Another issue, vibration of <br>
gasoline engines requires special attention but is similar to the situation we <br>
have when using glow engines. <br>
<br>
<br>
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G</tt><font size="2"><font face="Arial, Helvetica, sans-serif">eorge</font></font></pre>
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