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<DIV><FONT face=Arial size=2>I took a (2) pieces of foam about 2"sq x 4" long
and pushed them onto the c.f rod and placed them about 6 inches from each
end. I could then move the pieces back and forth to tune out the
harmonic resonants. Just watch the rod at various engine speeds to see
what it does. When it vibrates it is amazing that any of them would hold
together. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Wayne G.</FONT></DIV>
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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=rickwallace45@hotmail.com
href="mailto:rickwallace45@hotmail.com">Rick Wallace</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> Thursday, February 03, 2005 11:43
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: MK Dual Elavator Bellcrank
& Pushrod?</DIV>
<DIV><BR></DIV>
<DIV>
<DIV class=RTE>
<P>Agree w/ John about using foam as a vibration damper. Also, someone much
wiser than me pointed out that whatever is installed should NOT be halfway,
1/4 way, or any reasonable fraction of the pushrod length because these
may end up as stationary nodes in the vibrating rod, and end up doing no good.
</P>
<P>Rick<BR><BR></P></DIV>
<DIV></DIV>>From: "John Ferrell" <<A
href="mailto:johnferrell@earthlink.net">johnferrell@earthlink.net</A>>
<DIV></DIV>>Reply-To: discussion@nsrca.org
<DIV></DIV>>To: <discussion@nsrca.org>
<DIV></DIV>>Subject: Re: MK Dual Elavator Bellcrank & Pushrod?
<DIV></DIV>>Date: Thu, 3 Feb 2005 09:07:36 -0500
<DIV></DIV>>
<DIV></DIV>>Be very careful about alignment. An extra bushing on the shaft
can cause a lock up under vibration.
<DIV></DIV>>A foam rubber damper is safer. It can be as simple as a wad of
foam or as complicated as another bulkhead.
<DIV></DIV>>
<DIV></DIV>>John Ferrell
<DIV></DIV>>http://DixieNC.US
<DIV></DIV>>
<DIV></DIV>> ----- Original Message -----
<DIV></DIV>> From: Jerry Wilson
<DIV></DIV>> To: discussion@nsrca.org
<DIV></DIV>> Sent: Wednesday, February 02, 2005 10:59 PM
<DIV></DIV>> Subject: MK Dual Elavator Bellcrank & Pushrod?
<DIV></DIV>>
<DIV></DIV>>
<DIV></DIV>> I've mounted the bellcrank and will use Central's
carbon fiber push rod. The pushrod length from servo to crank is
about 28".
<DIV></DIV>>
<DIV></DIV>>
<DIV></DIV>>
<DIV></DIV>> 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?
<DIV></DIV>>
<DIV></DIV>>
<DIV></DIV>>
<DIV></DIV>> TIA
<DIV></DIV>>
<DIV></DIV>> Jerry
<DIV></DIV>>
<DIV></DIV>>
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