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<DIV><FONT face=Arial>Jerry,</FONT></DIV>
<DIV><FONT face=Arial>The easiest way is to turn the MK unit into a pull-pull
setup. Basically, it involves fabricating a horn that slips over and is glued
and screwed to the existing horn (center one that's inside the fuse). Delrin or
phenolic board about 3/32" - 1/8" thick is a good choice for the horn. The new
horn can be screwed to one of the existing holes in the built-in horn plus one
on the other side of center on the little stub that sticks out there. Ball
links are a good choice on both ends. I learned about this from Mickey Losardo
and if you've ever seen any plane fly from the Chicago area in recent years,
it's a pretty safe bet that it has Mickey's setup.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>The harmonic vibration forces that happen to a pushrod are
serious. I once sold a plane to a friend that I had flown for a whole season
without any problems. He changed the engine from a 1.4 FZ to a 1.4L. The
difference in vibration was enough to set up a harmonic force so strong that it
sheared off the splined output shaft on the servo. Others have reported similar
problems. The pull-pull setup is easier to make than describe and eliminates any
potential for problems from harmonic vibration. I realize this isn't quite the
answer you were looking for, but it's a proven alternative to using a
pushrod.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial>Verne</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=JWilsonJr@houston.rr.com href="mailto:JWilsonJr@houston.rr.com">Jerry
Wilson</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, February 02, 2005 10:59
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> MK Dual Elavator Bellcrank &
Pushrod?</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I’ve mounted the
bellcrank and will use Central’s carbon fiber push rod. The pushrod
length from servo to crank is about 28”. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Is it necessary to
install a support of the rod halfway down the fuselage to prevent
flexing. And if so does anyone have a simple way of doing this inside a
fiberglass fuselage?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">TIA<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Jerry<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>