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<P>Ron </P>
<P>- Excellent catch -- but calling them 'toads in the road' is so un-pattern-like! <BR><BR>I knew one of you school - learned engineer fellas would put us trade school guys right on the terms! </P></DIV>
<DIV></DIV>>
<DIV></DIV>>On Feb 3, 2005, at 11:43 AM, Rick Wallace wrote:
<DIV></DIV>>
<DIV></DIV>>>Agree w/ John about using foam as a vibration damper. Also, someone
<DIV></DIV>>>much wiser than me pointed out that whatever is installed should
<DIV></DIV>>>NOT be halfway, 1/4 way, or any reasonable fraction of the pushrod
<DIV></DIV>>>length because these may end up as stationary nodes in the
<DIV></DIV>>>vibrating rod, and end up doing no good.
<DIV></DIV>>
<DIV></DIV>>Rick - I thought "stationary nodes" that "end up doing no good"
<DIV></DIV>>were all those guys who complain about everything and help with
<DIV></DIV>>nothing. <VBG>
<DIV></DIV>>
<DIV></DIV>>BTW, that's good advice to place the foam dampers at irregular
<DIV></DIV>>intervals to avoid the vibration nodes.
<DIV></DIV>>
<DIV></DIV>>Ron Van Putte
<DIV></DIV>>
<DIV></DIV>>> >From: "John Ferrell" <johnferrell@earthlink.net>
<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
<DIV></DIV>>>can cause a lock up under vibration.
<DIV></DIV>>> >A foam rubber damper is safer. It can be as simple as a wad of
<DIV></DIV>>>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
<DIV></DIV>>>fiber push rod. The pushrod length from servo to crank is about
<DIV></DIV>>>28".
<DIV></DIV>>> >
<DIV></DIV>>> >
<DIV></DIV>>> >
<DIV></DIV>>> > Is it necessary to install a support of the rod halfway down
<DIV></DIV>>>the fuselage to prevent flexing. And if so does anyone have a
<DIV></DIV>>>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>>> >
<DIV></DIV>>
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