MK Dual Elavator Bellcrank & Pushrod?

[Bob Kane]

I did not get to that level of detail in my brief
description, but my bulkhead will be located slightly
ahead of the true center of the pushrod to avoid the
very problem you describe. 



--- Rick Wallace <rickwallace45 at hotmail.com> wrote:


---------------------------------

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. 

Rick




>From: "John Ferrell" <johnferrell at earthlink.net>
>Reply-To: discussion at nsrca.org
>To: <discussion at nsrca.org>
>Subject: Re: MK Dual Elavator Bellcrank & Pushrod?
>Date: Thu, 3 Feb 2005 09:07:36 -0500
>
>Be very careful about alignment. An extra bushing on
the shaft can cause a lock up under vibration.
>A foam rubber damper is safer. It can be as simple as
a wad of foam or as complicated as another bulkhead.
>
>John Ferrell
>http://DixieNC.US
>
>   ----- Original Message -----
>   From: Jerry Wilson
>   To: discussion at nsrca.org
>   Sent: Wednesday, February 02, 2005 10:59 PM
>   Subject: MK Dual Elavator Bellcrank & Pushrod?
>
>
>   I've mounted the bellcrank and will use Central's
carbon fiber push rod.  The pushrod length from servo
to crank is about 28".
>
>
>
>   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?
>
>
>
>   TIA
>
>   Jerry
>
>




=====
Bob Kane
getterflash at yahoo.com


		
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