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<DIV><FONT face=Arial size=2>Rick, I don't remember which Bolly muffler it was
(the engine was a ST2300), but mine also became very hard to blow through and
the engine wasn't really running (never did really run, though... it was soon
replaced by a 140RX). Took a foot long 1/4" drill bit, and drilled
multiple holes as far as the bit would go in from both ends. Fixed the
restriction problem. Also my last Bolly muffler.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=rickwallace45@hotmail.com
href="mailto:rickwallace45@hotmail.com">Rick Wallace</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> June 20, 2003 3:26 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Pipes - Plugging After Long
Use - Cleaning?</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I had a similar
problem on a Bolly 480 muffler - after several hundred flights. Acetone /
alcohol soaks didn’t seem to do much good, so I finally took a long ¼ dia
drill and drilled 6-8” straight up the center line through the exhaust end of
the muffler. It seemsed to relieve the obstruction problem, and is still one
of the quietest setups at the field. </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0in; BORDER-LEFT: blue 1.5pt solid; PADDING-TOP: 0in; BORDER-BOTTOM: medium none">
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>jim ivey<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday, June 19, 2003 11:23
PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> discussion<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: Pipes - Plugging After Long
Use - Cleaning?</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<DIV>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Brian</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"> If I remember correctly
the Carb cleaners will attack aluminum and maybe ruin the
pipe.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Jim Ivey</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"></SPAN></FONT> </P></DIV>
<BLOCKQUOTE
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0in; MARGIN: 5pt 0in 5pt 3.75pt; BORDER-LEFT: black 1.5pt solid; PADDING-TOP: 0in; BORDER-BOTTOM: medium none">
<DIV>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">----- Original Message
-----</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="BACKGROUND: #e4e4e4"><B><FONT face=Arial
color=black size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">From:</SPAN></FONT></B><FONT
face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"> Brian
Young</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><B><FONT face=Arial size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Sent:</SPAN></FONT></B><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">
Thursday, June 19, 2003 10:23 PM</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><B><FONT face=Arial size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Arial">To:</SPAN></FONT></B><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">
discussion@nsrca.org</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><B><FONT face=Arial size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Subject:</SPAN></FONT></B><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> Pipes -
Plugging After Long Use - Cleaning?</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Verdana size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"></SPAN></FONT> </P></DIV>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><FONT face=Verdana
size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">I think Ive heard
of this before but has anyone ever<BR>experienced a pipe becoming plugged
after prolonged<BR>use. This is a Bolly 590 which has been used for
three<BR>seasons now. I couldnt figure out why I was down<BR>500-600 rpm, 2
stroke engine is fairly freshly<BR>rebuilt, runs ok, just down on RRRRsss. I
finally put<BR>the thing on my test stand and noticed the pipe was<BR>hard
to blow through, swapped the pipe with another<BR>one and found 1000
rpm.<BR><BR>Now it turns 17x10N at 8500 on 25% w/ Bolly 565n<BR>Was at 7500
on 25% on the plugged Bolly 590.<BR><BR>Normally I run on 15%, but was
curious whether nitro<BR>would pickup the rpm before I figured the pipe must
be<BR>restricted.<BR><BR>Is it possible to clean the semi plugged pipe out?
Ive<BR>been trying carb cleaner.<BR><BR>=====<BR>Brian
Young<BR>Tulsa<BR>b4598070@yahoo.com<BR>918-745-6046h<BR>918-838-0900w<BR><BR>__________________________________<BR>Do
you Yahoo!?<BR>SBC Yahoo! DSL - Now only $29.95 per
month!<BR>http://sbc.yahoo.com<BR>=====================================<BR>#
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