Tag Archives: Push Rod

Building 4 Star 60 Day 38: Rudder & Elevator Push Rods

Rudder & Elevator Push Rods Installed at Servos

Tuesday was another 2hr building session, which is about my typical.  When you look at what I got done to the uninitiated you may think to yourself “It took you that long to do what?”.  In order to install the rudder and elevator push rods correctly it takes time.

The first step is to figure out where the control horns need to be attached to the control surface (rudder & elevator).  This is done by using a combination of the plans, to get a general idea where the horn needs to go as it’ll show where the support for it resides, and attaching the push rod to the servo to see where it lines up.   The second allows you to determine the angle at which the control horn needs to be fastened to line up with the end of the push rod.  As seen in the picture at the top I already have a hook in the push rod, which is attached to the servo arm.

Ensure that when you are installing the control horn and push rod the servo and control surface is in the neutral position.

Once this is determined you drill two holes through the control surface to act as the guides for the screws using a hand push drill, not electric, with a tiny bit.  In my case it is two holes kitty corner to each other on the base of the control horn for fastening.  When drilling you need to ensure you are going perpendicular to the surface and straight through, not at an angle, so take your time as it will pay off!  I made this mistake and didn’t get it right so when placing the screws the opening on the back wasn’t lining up with the holes in the back plate causing issues.  Thank-you John for the help correcting this and getting me on the straight and narrow for the elevator!

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