DU-BRO 101 - HOW TO INSTALL HEAVY DUTY ADJUSTABLE CONTROL HORNS ON RC AIRPLANES

Here’s a basic overview of how to install DU-BRO Heavy-Duty Adjustable Control Horns.
1. Insert bolt into beveled washer with the bolt head against the flat side of the washer
2. Place a bump washer onto the bolt next with the bump facing the beveled side of the washer previously installed
3. Insert the bolt into your prepared control surface hole.
4. Place the other bump washer onto the bolt in the control surface with the flat side facing the control surface.
5. Screw down the threaded aluminum barrel and snug it tight to slightly crush in the balsa.
6. Thread on the lock nut and use two pliers (any kind will do) to snug the lock nut against the threaded aluminum barrel
7. Thread on the remaining plastic arm and determine where to cut the bolt for the height needed for your control surface.
8. Remove the plastic arm, use a cutoff wheel on an electric rotary tool, and replace the arm.
9. Using the supplied DU-BRO Safety Lock Kwik-Link, connect the arm to a threaded push rod

[@easystar123]

Great video and very useful information. Thanks for sharing.

[@dubropineridge]

Glad it was helpful!

[@paulwright8532]

It would have nice to learn whether the connection point of the pushrod to control horn needed to be centered over the control surface hinge line, as with other types of control linkages. :-/

[@JoshuaOrchard]

Paul, you are correct in that the majority of applications you will want to align the hole where you'll attach your Kwik link with the hinge line of the control surface. There can be some debate in our community on how critical this is but there are some applications where this may not be required. I understand that that this geometry debate goes outside the "101" series presented here and that's why it is not emphasized in this video. I appreciate your guidance here and contribution to the community with your comment.