REFLECTOR: Roll trim mod suggestions

[FLY4FNKEV at aol.com]

I have heard of a lot of different opinions on the Velocity trim system. I  
was curious if anyone has ever tried a strictly aerodynamic trim system 
(trim  tab) like most conventional aircraft have. I have never really liked the 
spring  system, either for roll or pitch. 
 
Kevin
 
 
In a message dated 12/10/2013 6:55:32 P.M. Pacific Standard Time,  
numa at comcast.net writes:

 
 
 
 
 
Requesting suggestions from the hive mind...


After hearing  all the comments about the stock roll trim slipping, I 
decided that I would go  another way. When I saw Geoff's solution, I felt it was 
perfect.  


Except he has a motor with a .25" shaft where mine is 5/16". The  pulleys 
for the 5/16" shafts are only available in a larger diameter and that  caused 
interference issues with the aileron torque-tube bellcrank and cables.  


So I decided to go with a system similar to what is in my  Cessna. Chains!  
Absolutely no slipping with chains. And it works great.  Positive motion 
and no slipping. In fact, it will pull the spring around the  pulley. Which 
causes it to derail and get caught in the bellcrank.  :-(


I'm wondering if anyone has any suggestions on how to put in  a (simple) 
motion limiting mechanism. It would have to be on the motor or  chain. My 
first thought was microswitches that reverse the motor direction.  But I cant' 
figure out how to trigger the switches. 


Don






_______________________________________________
To  change your email address, visit  
http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery!   www.tvbf.org/gallery
user:pw = tvbf:jamaicangoose
Check new archives:  www.tvbf.org/pipermail
Check old archives:  http://www.tvbf.org/archives/velocity/maillist.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20131210/77a10dd3/attachment.html>