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<DIV><SPAN class=834002110-29042003><FONT face=Arial color=#0000ff
size=2>Alan,</FONT></SPAN></DIV>
<DIV><SPAN class=834002110-29042003><FONT face=Arial color=#0000ff 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 face=Arial color=#0000ff
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 face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=834002110-29042003><FONT face=Arial color=#0000ff
size=2>Ihncheol Park</FONT></SPAN></DIV>
<DIV><SPAN class=834002110-29042003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader 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>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 face=Arial color=#0000ff size=2>Good
Thread! But which is right? </FONT></SPAN></DIV>
<DIV><SPAN class=652520409-29042003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=652520409-29042003><FONT face=Arial color=#0000ff 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 face=Arial color=#0000ff
size=2>or</FONT></SPAN></DIV>
<DIV><SPAN class=652520409-29042003><FONT face=Arial color=#0000ff 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 face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=652520409-29042003><FONT face=Arial color=#0000ff size=2>Does
it make any difference with the engine ticking over?</FONT></SPAN></DIV>
<DIV><SPAN class=652520409-29042003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=652520409-29042003><FONT face=Arial color=#0000ff 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 face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=652520409-29042003><FONT face=Arial color=#0000ff size=2>Alan
Simmonds</FONT></SPAN></DIV>
<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>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 face=Arial color=#0000ff 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 face=Arial color=#0000ff size=2><SPAN
class=150564502-29042003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff 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 face=Arial color=#0000ff size=2><SPAN
class=150564502-29042003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=150564502-29042003>Any suggestions would be
appreciated,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=150564502-29042003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=150564502-29042003>thanks,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=150564502-29042003>Jerry</SPAN></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT
size=4></FONT> </DIV></BLOCKQUOTE></BLOCKQUOTE><BR><BR>Bob
Kane<BR>getterflash@yahoo.com
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