<DIV>I replied before seeing this response, so your question remains unanswered. I can only tell you my experience and what I did about it. <STRONG><EM></EM></STRONG></DIV>
<DIV><STRONG><EM></EM></STRONG> </DIV>
<DIV><STRONG><EM>Ihncheol Park <PatternFlyer@msn.com></EM></STRONG> wrote:</DIV>
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<DIV><SPAN class=834002110-29042003><FONT color=#0000ff face=Arial size=2>Alan,</FONT></SPAN></DIV>
<DIV><SPAN class=834002110-29042003><FONT color=#0000ff face=Arial size=2>My reason for the thin-walled tubing is not just for our pattern flying.</FONT></SPAN></DIV>
<DIV><SPAN class=834002110-29042003><FONT color=#0000ff face=Arial size=2>Several members of my local clubs gets their plane as high as possible and start vertical dive with lots of rolls, snaps, spin and whatever they call. I've seen a few dead sticks with hard straight clunk tubes. I prefer my engine to keep running unless there is not fuel left in my fuel tank.</FONT></SPAN></DIV>
<DIV><SPAN class=834002110-29042003><FONT color=#0000ff face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=834002110-29042003><FONT color=#0000ff face=Arial size=2>Ihncheol Park</FONT></SPAN></DIV>
<DIV><SPAN class=834002110-29042003><FONT color=#0000ff face=Arial size=2></FONT></SPAN> </DIV>
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<DIV align=left class=OutlookMessageHeader dir=ltr><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>Alan Simmonds<BR><B>Sent:</B> Tuesday, April 29, 2003 2:12 AM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> RE: Fuel tank<BR><BR></FONT></DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2>Good Thread! But which is right? </FONT></SPAN></DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2>Stop the clunk falling to the front of the tank and potentially crimping the fuel line</FONT></SPAN></DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2>or</FONT></SPAN></DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2>Use a thin walled line that will always fall to the front of the tank.</FONT></SPAN></DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2>Does it make any difference with the engine ticking over?</FONT></SPAN></DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2>I use the thin walled tube myself but would be interested to know which camp is the majority.</FONT></SPAN></DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=652520409-29042003><FONT color=#0000ff face=Arial size=2>Alan Simmonds</FONT></SPAN></DIV>
<DIV></DIV>
<DIV align=left class=OutlookMessageHeader dir=ltr lang=en-us><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>Bob Kane<BR><B>Sent:</B> 29 April 2003 04:56<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> Re: Fuel tank<BR><BR></FONT></DIV>
<DIV>Does it quit on the way up, or on the way down? What kind of engine are you using? </DIV>
<DIV> </DIV>
<DIV>There are at least two possible problems. Your idle setup could be off, causing the changing fuel flow during this manuever to kill the engine. The engine should run for a long time at idle with the fuel remaining in the line even when the clunk is "high and dry" so to speak, certainly long enough to finish the downline and level off, restoring fuel flow. The other problem could be a pinched fuel line inside the tank. I had similar problem, flameouts after a stall turn. I discovered the clunk would pull the feeder line into the fuel on a downline but the clunk would stay in the front of the tank, folding the feeder line and starving the engine of fuel. I now assemble my tanks with an aluminum tube in the pickup line so the clunk can't fold back on itself.</DIV>
<DIV> </DIV>
<DIV>I would make sure the idle setup on your engine is reliable. It should idle for a very long time with no change in rpm. Run the engine on the ground at full throttle, then pull back to idle. If it runs at steady rpm, all is fine. If it slowly slows down and dies, it is rich. If is speeds up then dies, it is lean.<BR><BR><B><I>Jerry Wilson <jerrywil@swbell.net></I></B> wrote:</DIV>
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<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=150564502-29042003>I have just found a problem that I'm sure many people on the list have solved before. Often while doing a stall turn, my engine would stop and a dead stick landing would follow. After discussing this with a friend at the field it was suggested that it could be a fuel tank problem. So I took the tank out tonight to have a look. With fuel inside I could see that when the tank was inverted as in a stall turn manouver as you go over the top, the clunk would often rest against the side of the tank. So when the nose is pointed down, the clunk could hang at the aft end of the tank but the fuel is at the nose. </SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=150564502-29042003></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=150564502-29042003>I've changed the length of the tubing (shorter and longer) and even added a wheel collar to the line at the clunk, but so far I can't tell much difference.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=150564502-29042003></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=150564502-29042003>Any suggestions would be appreciated,</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=150564502-29042003></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=150564502-29042003>thanks,</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=150564502-29042003>Jerry</SPAN></FONT></DIV>
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<DIV align=left class=OutlookMessageHeader dir=ltr><FONT size=4></FONT> </DIV></BLOCKQUOTE></BLOCKQUOTE><BR><BR>Bob Kane<BR>getterflash@yahoo.com
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