[NSRCA-discussion] Pull-pull setups

[CHV69 at aol.com]

In a message dated 1/23/2008 8:06:14 P.M. Eastern Standard Time,  
jnhiller at earthlink.net writes:

John,  I can’t comment on Kevlar. I have only used steel (.021” Sig control 
line  cable). I also use internal bell cranks to eliminate cable tension load 
on the  servo mount rubber grommets and shaft. This way I can run the cables 
quite  snug. Short ball link connectors connect the bell cranks to the servo.  
By using different holes in the servo  wheel or bell crank I can use the full 
servo travel, and reduce the control  surface travel without resorting to 
non-parallel linkage or transmitter  endpoint and accompanying resolution  
reduction. 
I  haven’t been totally happy using dual elevator servos so I cable them as 
well,  connecting all 4 cables to a single bell crank. It is quite easy to 
balance  the travel, center and end-points by adjusting the threaded control horn 
and  cable length. When I started doing this it yielded the tightest system I 
ever  used. 
For  what it is worth.


I like that idea for the elevator setup.
What type of bell crank is it that you use?
 
Carl



**************Start the year off right.  Easy ways to stay in shape.     
http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20080124/0f3a9683/attachment.html