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<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3><SPAN class=822330622-04102005>Gents-just passing on Chris's comments ( I
tried to get him to sign up)</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3><SPAN class=822330622-04102005></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3><SPAN class=822330622-04102005>Tom</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3></FONT></SPAN> </DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3><SPAN class=822330622-04102005>Dear Discussion
list,</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3><SPAN class=822330622-04102005></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3>Regarding <SPAN class=822330622-04102005>Eric's</SPAN>
comments <SPAN class=822330622-04102005>for</SPAN> the OS160. I have been
flying this set-up for around two years now with none of the problems
that <SPAN class=822330622-04102005>were</SPAN> mention<SPAN
class=822330622-04102005>ed</SPAN>. There are multiple things that
will <SPAN class=822330622-04102005>a</SPAN>ffect mixtures through the rev
range. Type of pipe, tuning of pipe( lengths etc), fuel used(oil and nitro
content), plug, compression ratio etc. </FONT></SPAN></DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3></FONT></SPAN> </DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3> All <SPAN class=822330622-04102005>I</SPAN> have
done is reduced pump pressure by half a turn, run an OS F plug, an old carbon
Mintor pipe, 15% cool power oil 15% nitro and spent a lot of time initially
setting the optimum pipe length( don't ask me what it is), as all<SPAN
class=822330622-04102005> </SPAN><SPAN class=822330622-04102005>I</SPAN> have
done is kept changing it until <SPAN class=822330622-04102005>I</SPAN> was
satisfied. My set-up is very soft, the motor comes on<SPAN
class=822330622-04102005> the</SPAN> pipe very early in the rev range<SPAN
class=822330622-04102005> </SPAN>( maybe you<SPAN class=822330622-04102005>
</SPAN><SPAN class=822330622-04102005>are</SPAN> running a peaky set-up<SPAN
class=822330622-04102005>?</SPAN>)</FONT></SPAN></DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3></FONT></SPAN> </DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS"><FONT
color=#0000ff><FONT size=3> Out of all the engines<SPAN
class=822330622-04102005> I have run</SPAN> over the years ( including
YS's<SPAN class=822330622-04102005>)</SPAN> <SPAN
class=822330622-04102005>I</SPAN> have found it to be the best set-up for me. It
is the smoothest in regards to mixture and rpm's. <SPAN
class=822330622-04102005>You may not </SPAN>have<SPAN class=822330622-04102005>
</SPAN>explored all the tuning options<SPAN class=822330622-04102005>?</SPAN>
What works for me hasn't obviously worked for<SPAN class=822330622-04102005>
others</SPAN>. By the same token <SPAN class=822330622-04102005>there
are</SPAN> many guys who have problems with a YS<SPAN
class=822330622-04102005>, OS or whatever they choose
to run.</SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3><SPAN class=822330622-04102005></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3><SPAN class=822330622-04102005>Feel free to contact me at<FONT
size=1> <A href="mailto:Christopher.Swain@csiro.au"><FONT
size=3>Christopher.Swain@csiro.au</FONT></A></FONT></SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3></FONT></SPAN> </DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3>Best regards</FONT></SPAN></DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3></FONT></SPAN> </DIV>
<DIV><SPAN class=851533621-04102005><FONT face="Comic Sans MS" color=#0000ff
size=3>Chris Swain</FONT></SPAN></DIV></DIV>
<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>Grow
Pattern<BR><B>Sent:</B> Saturday, 1 October 2005 1:37 PM<BR><B>To:</B>
Discussion<BR><B>Subject:</B> Re: OS 160 pump backplate<BR><BR></FONT></DIV>
<DIV>Before you all leap out and spend a bunch of money on an OS pump for your
OS 1.60 here is what I found out while experimenting with the OS
1.60's.</DIV>
<DIV> </DIV>
<DIV>First of all, you cannot buy the pump separately. It comes installed on the
1.40 back plate.approx $150.</DIV>
<DIV> </DIV>
<DIV>Secondly, the standard OS 1.60 carb did not like the OS pump anywhere near
as much as it liked the Cline regulator. (Other 1.60 users swear by the Perry).
Either way the OS pump produced too much fuel for the OS 1.60 carb.</DIV>
<DIV> </DIV>
<DIV>I spent a lot of time working on the pump in the backplate with the
std carb. Tried twin pug heads etc. Still could not get a good transition. If I
leaned the pump for a good transition then the engine would go lean
in the verticals. I finally had enough of this and went to the OS mix carb (the
one that is sadly not available). </DIV>
<DIV> </DIV>
<DIV>You, (or at least I, could not) cannot get the std carb to work well
with a pipe when the fuel is supplied from an OS 1.40 pump. I did get it to
work well with a 1.40 RX carb. This carb is designed for the pump but needs to
be drilled and tapped to take 3.5-mm screws to hold it in place.</DIV>
<DIV> </DIV>
<DIV>The Cline will get you much better results for around $40. (Or Perry if you
prefer) and you can use your existing.</DIV>
<DIV> </DIV>
<DIV>Regards,</DIV>
<DIV> </DIV>
<DIV>Eric.</DIV>
<DIV> </DIV>
<DIV><FONT face="Comic Sans MS" color=#0000ff
size=3></FONT> </DIV></BODY></HTML>
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