Easy Custom Pushrods

Easy Custom Pushrods

Many kits are made to precise standards, and this includes the pushrods. They are perfect for the recommend servos, but when using servos that have the output arms in a different location, those included pushrods may not work as well. This happened to me, and it meant that I needed to make up my own pushrods for the elevators. I purchased some 2-56 threaded pushrod from the local hobby shop and cut it to the size needed, which was only about 3 to 4 inches long.

But I found out that threaded rod is not very rigid and tended to flex a little when the control surfaces were at full deflection. I had some copper tubing lying around that would allow the threaded rod to fit inside it. I cut some tubing so just about 1/2 inch of rod extended out of each side. I then used 2-56 nuts on each end and tightened down the tubing to the rod. This created a very rigid pushrod that was also very light and clean looking. You can save even more weight by using aluminum or carbon-fiber tubing instead of copper. Of course, I just used what was in the shop.

The nice thing about this is that you can make custom-length pushrod any time and not spend a lot of money doing it. Now I have extra 2-56 and 4-40 threaded rod along with the matching copper and aluminum tubing in my shop—just in case I need another custom-size pushrod.

Updated: July 20, 2015 — 12:23 PM
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