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<DIV>It's me again Earl,</DIV>
<DIV>I know you have seen the piedmont website. The cold weather operation
sounds just like you problem.</DIV>
<DIV>Ref to <A
href="http://piedmontmodels.com/webra_setup.htm">http://piedmontmodels.com/webra_setup.htm</A></DIV>
<DIV> </DIV>
<DIV> Jim Ivey</DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="FONT: 10pt arial"><B>From:</B> <A title=ev3464@sccoast.net
href="mailto:ev3464@sccoast.net">Earl Vincent</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">nsrca</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, March 25, 2003 9:47
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> fuel filter puzzle</DIV>
<DIV><BR></DIV>
<DIV>
<DIV><FONT face=Arial size=2>I would like to share an interesting problem, one
I unknowingly created that cost me an entire afternoon of flying
yesterday.</FONT></DIV>
<DIV><FONT face=Arial size=2>after some modifications to my Temptation cheek
cowls, I moved my Sullivan crab trap fuel filter from a position I have
used</FONT></DIV>
<DIV><FONT face=Arial size=2>them in for years, between the pump and carb with
never a problem, to before the inlet of the fuel pump thinking to stop
any</FONT></DIV>
<DIV><FONT face=Arial size=2>junk from entering the pump. I had changed a
number of things, tank, vent line etc. so isolating this was difficult. On
midrange</FONT></DIV>
<DIV><FONT face=Arial size=2>throttle after a prolonged idle, the engine(Webra
145) would almost shut off and then catch and be fine on the top end, it
was</FONT></DIV>
<DIV><FONT face=Arial size=2>driving me nuts, coming out of a corner go half
stick to start slow roll, sounded like engine quit, after a number of passes
and</FONT></DIV>
<DIV><FONT face=Arial size=2>trying it after 3 turn spin it was ok but anytime
a long straight line power off the hesitation would occur. So the next
time it happened, I shut the motor down and landed. This was after about
10 take off and landings making adjustments to the midrange</FONT></DIV>
<DIV><FONT face=Arial size=2>and high speed needles. I was inspecting for the
normal stuff, clunk in the tank, hole in a fuel line, etc. when I noticed
large air</FONT></DIV>
<DIV><FONT face=Arial size=2>bubbles in the line from the pump to the carb. I
started back tracking the things I had changed because this was a new
problem</FONT></DIV>
<DIV><FONT face=Arial size=2>Changing the fuel filter<FONT face=Arial
size=2></FONT> back to between the pump and carb fixed the
problem</FONT><FONT face=Arial size=2>, I guess it worked as a air chamber and
was making the pump loose its prime. moral of the story, if it ain't broke,
leave it the hell alone!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Oh while I am typing, a Greves pipe on OS
140 set at 28 inchs, add 2 extra head shims produces a solid 7800 rpm
with 17x12</FONT></DIV>
<DIV><FONT face=Arial size=2>reg blade APC. I see a lot of rpm ranges
for this engine prop combo and anything in the 8000 and above I have found
comes off</FONT></DIV>
<DIV><FONT face=Arial size=2>the pipe on long up lines.I was running 16X12 at
8600 rpm to pull 10.9 lb Focus around 2 years ago and this Greve set up
produces</FONT></DIV>
<DIV><FONT face=Arial size=2>some serious pull on the 10.75 lb Focus I now
have it on, a lot more torque and a lot quieter you have to try it to see it
for yourselves oh fuel is 15% cool power. The engine does not seem to wind up
high rpms but it seems to stay solid in the up lines.</FONT></DIV>
<DIV><FONT face=Arial size=2>enough for now. see yas at
Muncie! PS the rpm in higher at 7/8
throttle than at full, go figure?</FONT></DIV>
<DIV><FONT face=Arial size=2>Earl Vincent</FONT></DIV>
<DIV><FONT face=Arial
size=2></FONT> </DIV></DIV></BLOCKQUOTE></BODY></HTML>