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<DIV><SPAN class=287481903-02062003><FONT face=verdana>Those numbers are TT
adapter nuts. The APC props have different hub thickness depending on what size
prop you are using. Some TT spinners will not fully engage the backplate if the
prop hub is too thick....other TT spinners when tightened will distort the
spinner backplate.</FONT></SPAN></DIV>
<DIV><SPAN class=287481903-02062003>You can add washer shims in front of the
adapter nut to prevent the distorting and shorten the adaptor nut if the spinner
will not go on all the way. It's kinda goofy but that seems to be the way it is.
I asked a few other flyers about this problem a few years back but they didn't
seem to know what I was talking about.</SPAN></DIV>
<DIV><SPAN class=287481903-02062003>TT may make a short and long adaptor
nut....but I couldn't find it on their website.</SPAN></DIV>
<DIV><SPAN class=287481903-02062003></SPAN> </DIV>
<DIV><SPAN class=287481903-02062003><FONT face=verdana>Dave</FONT></SPAN></DIV>
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<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma>-----Original Message-----<BR><B>From:</B>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org] <B>On
Behalf Of </B>jim ivey<BR><B>Sent:</B> Sunday, June 01, 2003 8:00
PM<BR><B>To:</B> discussion<BR><B>Subject:</B> Re: YS 140L tuning
questions<BR><BR></FONT></DIV>
<DIV> lhncheol</DIV>
<DIV>You may have the wrong threaded adapter nut. Check that out. I'm not
familiar with 813A, or 814A. What are these numbers. Been a while since I
bought adapters.</DIV>
<DIV> My 140l's run at full throttle about 1 1/4 to 1 1/3 needle opening.
That has a lot to do with nitro content. I run 30% heli fuel. I'm guessing 2
turns out is a good starting place.</DIV>
<DIV> </DIV>
<DIV>Jim Ivey</DIV>
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<DIV style="FONT: 10pt Arial">----- Original Message -----</DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt Arial; COLOR: black"><B>From:</B>
Ihncheol Park</DIV>
<DIV style="FONT: 10pt Arial"><B>Sent:</B> Sunday, June 01, 2003 10:19
PM</DIV>
<DIV style="FONT: 10pt Arial"><B>To:</B> discussion@nsrca.org</DIV>
<DIV style="FONT: 10pt Arial"><B>Subject:</B> RE: YS 140L tuning
questions</DIV>
<DIV> </DIV>
<META content="MSHTML 6.00.2800.1170" name=GENERATOR>
<DIV><SPAN class=201565401-02062003><FONT
face=verdana>Jim,</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>I just replaced the
prop nuts with the standard YS washer and double nuts, the problem of
loosening of spinner and prop is gone.</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003><FONT
face=verdana></FONT></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>It looks like the
tru-turn adapter that I used worn out. the large nut is kind of loose
on the shaft.</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003><FONT
face=verdana></FONT></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>I never open the
throttle fast because of what you explained (lean condition). I am
also afraid to do so even with small YS 4-stroke engines after hearing this
engine broke two hyde mounts and damaged airframe. So, I opened very
slowly, and little by little looking at the muffler and the spinner, being
ready to shut down.</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003><FONT
face=verdana></FONT></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>Now, the high speed
needle is about 2 and 3/4 turn out. I went to full throttle and stayed
there about a minute and backed down.</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003><FONT
face=verdana></FONT></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>The engine died
slowly. (rich?)</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003><FONT
face=verdana></FONT></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>I printed out Troy's
explanation on how to set the engine and read it over a few times.
Unfortunately, I don't have a plane ready for this engine
yet.</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>Each run of the
engine didn't go more than 3 minutes to make sure the engine doesn't get too
hot on the ground.</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003><FONT
face=verdana></FONT></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>By the way, do you
people use Tru-Turn 813A for 140? or 814A? I used 814A because I
already had it. What's is the differences between the
two?</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003><FONT
face=verdana></FONT></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>I know that without
the spinner, 814A does not fit on YS 140L with very long
shaft.</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003><FONT face=verdana>Looks like I have to
order both.</FONT></SPAN></DIV>
<DIV><SPAN class=201565401-02062003><FONT
face=verdana></FONT></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003>Thank you,</SPAN></DIV>
<DIV><SPAN class=201565401-02062003></SPAN> </DIV>
<DIV><SPAN class=201565401-02062003>Ihncheol </SPAN></DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT
face=Tahoma>-----Original Message-----<BR><B>From:</B>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org]<B>On
Behalf Of </B>jim ivey<BR><B>Sent:</B> Sunday, June 01, 2003 6:50
PM<BR><B>To:</B> discussion<BR><B>Subject:</B> Re: YS 140L tuning
questions<BR><BR></FONT></DIV>
<DIV>lhncheol</DIV>
<DIV>When you open the throttle don't let it go wide open to the stops.
This will be a lean condition. Always adjust full throttle for barrel to
be straight up and down, not all the way open. This is really important
with a Hyde or similar mount that will stretch under full power.</DIV>
<DIV> For the spinner use double prop nuts. One nut will lock the
prop nut. I also use washers to space the spinner so that the spinner bolt
tightens against the nut without bending the backplate.</DIV>
<DIV> If you hear that loud hammering or pinging you are lean. That's
why it throws the props and spinner. Don't let it do that.</DIV>
<DIV> The first tank on a rebuilt or new engine should be well on the
rich side. After that put in plane and fly, slowly leaning engine for a
few flights. The engines get more cooling in the air.</DIV>
<DIV> There is a method to set the low end at 2000 rpm and to set max
rpm. I will let someone else talk about that.</DIV>
<DIV> </DIV>
<DIV>Jim Ivey</DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt Arial">----- Original Message -----</DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt Arial; COLOR: black"><B>From:</B>
Ihncheol Park</DIV>
<DIV style="FONT: 10pt Arial"><B>Sent:</B> Sunday, June 01, 2003 9:13
PM</DIV>
<DIV style="FONT: 10pt Arial"><B>To:</B> NSRCA</DIV>
<DIV style="FONT: 10pt Arial"><B>Subject:</B> YS 140L tuning
questions</DIV>
<DIV> </DIV>OK, finally, I got all the parts installed including
the updates.<BR>Here is the current setting.<BR>Idle screw and 2 turn
out.<BR>High speed at 2 turn out.<BR>Regulator screw 1/4 turn out from
flush with case.<BR>The engine is mounted upright on a stand with AAP
muffler<BR>Magnum #2, APC 15x12W. (I listened to Troy Newman and
bought the props!!)<BR><BR>I had to use music wire support from mount to
the muffler because it kept<BR>come loose within a minute of
running.<BR><BR>At idle, the engine spits fuel out of carb a lot as in
rich condition.<BR>Going fine up to 2/3 throttle.<BR>When near the full
throttle, there is a sharp "Ping~" sound. Spinner and<BR>prop got
loose (tru-turn nuts are still on the shaft). Fortunately,
the<BR>spinner cone was not damaged for the last 5 attempt. (the
cone came loose<BR>twice flying upto 15 feet).<BR><BR>Am I still
lean?<BR>Compression is very strong even with 3 head gaskets. Before
running, there<BR>was almost no compression and had a little of hard
time starting with<BR>chicken stick. (Excellent excercise on my
right arm. I could not use kavan<BR>starter because of very sticky
soft cone staying on the spinner.).<BR><BR>Now, I am afraid if I will
damage the engine.<BR>What is a good way to keep the spinner and prop
not to come loose?<BR><BR>Any suggestions?<BR><BR>Thank
you,<BR><BR>Ihncheol
Park<BR><BR><BR><BR><BR>=====================================<BR># To be
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