I've been looking on here and found several good threads for installing a pull pull system. For example this one http://www.rcuniverse.com/forum/m_72...tm.htm#7237017 Thanks "somegeek".

I think I have the whole thing down except for one part. If I use back to back control horns on opposite sides of the rudder, how are they mounted? I have always installed control horns that have the back plate. So what happens to the back plate if there is a control horn on the other side of the rudder? Does the screws just screw into the control horn on the other side, or do I need a small nut to hold it all in place?

Or would I just be better off using this system with the rod that passes through the rudder? http://www3.towerhobbies.com/cgi-bin...?&I=LXEMF6&P=0

This will be going on a Sig Something Extra, and if it works out, probably on any other future planes.

Thanks

Personally, I prefer the rod that goes through the rudder. If using two horns, you need to put small nuts on the screws

Thanks Minnflyer. I ordered one with the rod.

The Dubro super strength control horns mate up to each other when installed in this fashion. I use 2-56 machine socket head screws and nylon lock nuts. I have this setup on 3/4 of my fleet.

If the control surface is made such that you can recess and glue in a couple of small pieces of thin aircraft plywood, you can just use wood screws to hold the horns on. This method would generally require the surface to be sheeted foam, but build up if reinforced properly would be fine with this method too. 1/8" thick ply sized about 1.5"x0.5" is enough to distribute the load for a 1/4 scale aerobatic plane with a 180 class motor.

Thanks Deadeye. I thought about that way too. This will be my first attempt at a pull-pull system. So, I'm going to check out a couple ways, and decide what looks like will work the best/easiest.