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<DIV><FONT size=2>The Zenoah has a pumped gas carb. Doesn't need pressure,
and doesn't work well if closed system. If you're concerned about gas
overflow, put a gas check valve in the vent line with a short piece of tubing,
which you will remove when filling the tank. When installed, it will only
let air INTO the tank, and not permit gasoline to overflow.</FONT></DIV>
<DIV><FONT size=2> However, in hot temps, pressure will build
in the tank, and Walbro carbs don't permit free flow when not running, so
something will give someplace.</FONT></DIV>
<DIV><FONT size=2> I'd recommend just a standard open
vent.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Bob P</FONT></DIV>
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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=nik.middleton@idl-bt.com
href="mailto:nik.middleton@idl-bt.com">nik.middleton@idl-bt.com</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> Wednesday, September 18, 2002 7:12
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Muffler tank pressure</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2><SPAN class=309374811-18092002>Hi
guys,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=309374811-18092002></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=309374811-18092002>I'm experimenting
with a plane I want to try some artistic flying with. I'm intending
fitting a Zenoah Gas engine. My question is, what;s the best way of
putting pressure on the tank, in that I want a closed system. Do I just
fit a nipple on the standard muffler?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=309374811-18092002></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=309374811-18092002>rgds</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=309374811-18092002></SPAN></FONT> </DIV></BLOCKQUOTE></BODY></HTML>