have noticed many modelers,and planes being built, now use the pull,pull system. my question is "what size wire to use, and secondly how much strain to put on the servos? thanks dave p : :

refer to all the articles, complete with pictures, on setting up Pull-Pull systems available under =
"Aircraft Design. Airfoils, Pull-Pull Systems, Flight Trim & Static Thrust Calculator. (CG,Colour,Trim etc.= more in Folders below)"
at http://homepages.ihug.co.nz/~atong/

The cables should be taught but not tight so that when one side is pulling, the other has a slight amount of slack. This to relieve any pressure on the servo or hinges if the symetry is not true.

regards
Alan T.

This was a very helpful article when I was getting ready to install my first pull pull.

http://members.cox.net/bdfelice/Ackerman/ackerman.htm