Installing control horns is one of the most fundamental tasks for any RC airplane builder, yet it’s also one of the easiest places to make subtle mistakes that affect performance. In this DU-BRO 101 walkthrough, we’re breaking down how to install nylon T-style control horns the right way—from alignment and drilling to securing the backplate and finishing screws cleanly. Whether you’re a beginner or a seasoned builder, these techniques ensure a cleaner, stronger, and more reliable installation every time.
Why Control Horn Installation Matters
A control horn is a small component, but it plays a huge role in translating servo movement into precise, predictable control of your aircraft. Misalignment or sloppy installation can lead to binding, uneven throws, unnecessary stress, or even failure in flight. Using high-quality parts like the DU-BRO Nylon T-Style Control Horns ensures durability and consistency.
Preparing the Control Horn and Surface
The video demonstrates DU-BRO’s Nylon T-Style Control Horns, Part #237, which include two horns, two backplates, and four screws. Begin by separating the nylon parts with sharp side cutters. This gives you clean edges and ensures everything sits flush on your control surface.
These techniques work on nearly any structure—balsa, iron-on covering, or composite surfaces—making them a universal approach for RC builders. For more high-quality RC building materials, check out DU-BRO’s full line of construction accessories.
Perfecting Alignment with Double-Sided Tape
Many modelers mark their drilling holes using a pen, but this leaves room for error. A better technique is to place a small piece of thin double-sided tape—such as Scotch poster tape—on the base of the control horn. This allows you to position the horn precisely over the hinge line and pushrod path. If you misalign it, simply peel and reposition.
Once aligned, the horn is secure enough to drill through accurately. Using a pen vise with a 1/16" drill bit gives better control than a power drill and prevents tearing the covering. DU-BRO offers excellent precision tools and hardware to support this exact kind of modeling work.
Installing the Backplate
Next, thread the screws through the horn base until they barely protrude. Position the backplate underneath and alternate tightening each screw. This draws the backplate evenly against the control surface without crushing your structure. Even if the tape remains in place, it won’t affect the installation.
For additional screws, mounting hardware, and RC fasteners, explore DU-BRO’s hardware selection.
Cleaning Up the Screws
Often, screws extend beyond the backplate more than you'd like. Though harmless, they can look untidy. Trim them using side cutters, a hacksaw, or a Dremel tool. Afterwards, round off any sharp edges using a file or grinding bit—preventing cuts to your hands or damage to your aircraft.
DU-BRO’s high-quality hand tools make these finishing touches easier and safer.
Final Thoughts
With the right tools, proper alignment, and high-quality DU-BRO hardware, installing control horns becomes a precise and repeatable process. These simple techniques result in cleaner builds, smoother control, and improved long-term reliability for your RC airplane. Whether you’re building your first trainer or your tenth giant-scale model, DU-BRO products help ensure everything functions exactly as it should.
