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<DIV><SPAN class=071101819-30082004><FONT face=Arial color=#0000ff size=2>I use
a Slimline check valve from a smoke system on the vent line on my IMAC plane and
the tanks does indeed swell up and collapse depending on air
temps.</FONT></SPAN></DIV>
<DIV><SPAN class=071101819-30082004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=071101819-30082004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=071101819-30082004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=071101819-30082004><FONT face=Arial color=#0000ff
size=2>Rich</FONT></SPAN></DIV>
<DIV><SPAN class=071101819-30082004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=071101819-30082004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
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<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org] <B>On
Behalf Of </B>Ed Deaver<BR><B>Sent:</B> Monday, August 30, 2004 3:07
PM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> Re: Using check valve
in YS 140DZ fuel system<BR><BR></FONT></DIV>
<DIV>I've used the check valve in the vent line from day one without any
problems. Have never noticed any pressure buildup at all in the
tank.</DIV>
<DIV> </DIV>
<DIV>ed<BR><BR><B><I>Peter Pennisi
<pentagon.systems@bigpond.com></I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"><BR><BR>Some
flying buddies of mine have been having a discussion about using
a<BR>check-valve in the fuel system to essentially stop fuel from dripping
out of<BR>the vent line. I have been using this system without any problems
that I<BR>know off for some time. One of the pattern flyers I fly with is
very good<BR>with engines and he doesn't think it is a very good idea to use
the valve in<BR>the DZ fuel system as the tank will always have a slight
pressure build up<BR>inside which may result in inconsistent engine runs. I
don't know about his<BR>theory but I do know that all the Japanese flyers at
the recent CAOCC event<BR>were using check valves in the fuel
system.<BR><BR>I would be interested to hear from anyone who may have an
opinion on
this<BR>subject.<BR><BR><BR>Regards,<BR><BR>Peter<BR><BR><BR>=====================================<BR>#
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