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Gene Maurice wrote:<br>
<blockquote type="cite"
cite="midNABBKBCPOPNIIFMBCHJNCEKIELAA.gene.maurice@comcast.net">
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<div><span class="489220114-27092003"><font face="Arial"
color="#0000ff" size="2">Buddy,</font></span></div>
<div><span class="489220114-27092003"></span> </div>
<div><span class="489220114-27092003"><font face="Arial"
color="#0000ff" size="2">What I used on my YS's is a MAC's 3.5cc Quiet
Pipe. The only mod I did to them was open up the two holes in the muffling
baffle to 1/4". I used this set up on both 120 AC's and a 140 L. As compared
to a Hatori, it may be 100 RPM less due to the reduced size but it only
weighs 2.4 oz. and is less that $40 at most hobby shops (at least the last
time I bought one). It's an effective, simple, and cheap alternative.</font></span></div>
<div><span class="489220114-27092003"></span> </div>
<div><span class="489220114-27092003"> </span></div>
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<br>
I use an unmodified 6.5 cc Macs quiet pipe on my YS 1.40L. Works for me
too.<br>
<br>
Ron Van Putte<br>
<blockquote type="cite"
cite="midNABBKBCPOPNIIFMBCHJNCEKIELAA.gene.maurice@comcast.net">
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<blockquote>
<div class="OutlookMessageHeader" dir="ltr" align="left"><font
face="Tahoma" size="2">-----Original Message-----<br>
<b>From:</b> <a class="moz-txt-link-abbreviated" href="mailto:discussion-request@nsrca.org">discussion-request@nsrca.org</a> [<a class="moz-txt-link-freetext" href="mailto:discussion-request@nsrca.org">mailto:discussion-request@nsrca.org</a>]<b>On
Behalf Of </b><a class="moz-txt-link-abbreviated" href="mailto:BUDDYonRC@aol.com">BUDDYonRC@aol.com</a><br>
<b>Sent:</b> Saturday, September 27, 2003 8:49 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:discussion@nsrca.org">discussion@nsrca.org</a><br>
<b>Subject:</b> Header,teflon, Muffler?<br>
<br>
</font></div>
<font face="arial,helvetica"><font lang="0" face="Arial"
color="#8000ff" size="2" family="SANSSERIF">I have been having occasional
problems with RPM and what seems like overheating on my YS-140-L. I have
come to believe the problem is restriction in the muffler, but the muffler
seems to be open and OK<br>
The problem seems to have something to do with the prop size also. <br>
Running a 15-1/2 x 13N rpm at about 8200 everything is fine, switched
to a 16 x11 and running @ 8400 rpm and later in the flight the power back's
off, I think it is heating up.<br>
Yesterday I switched to a 16 x10 prop turning 8800 rpm and half way through
the flight I heard a loud pop, After that the engine would not turn up.
I landed and found that the Teflon coupler had split long ways about three
inches long and had curled inward restricting the flow. This has happened
on two different mufflers a Hatori and a Johnson that is shaped like the
Hatori Has anyone run into this problem before? and what is the solution?
Is there another Aluminum muffler that will work? I have another setup
using a CF muffler and have not had problems with it even at 9000rpm with
a 16 x11 prop but choke when I think of spending $175.00 for another
muffler.<br>
Buddy </font></font></blockquote>
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