Gator RC 70mm Adjustable Control Horn w/ Rod – Aluminum RC Linkage

Gator RC 70mm Adjustable Control Horn w/ Rod

This Gator RC 70mm adjustable control horn system is a complete linkage solution designed for medium to large RC airplanes. Featuring a steel M4 threaded rod, brass linkage components, and adjustable mounting washers, this system provides a strong, precise, and adaptable connection between your control surface and servo linkage.

A complete, adjustable control horn system for 35–100cc RC aircraft — featuring a steel 4mm threaded rod (70mm), a brass 3mm pushrod with wire pass-through, adjustable taper washers for gap-free surface contact, and a 3mm ball link for smooth, precise servo-to-control-surface connection. At 13 grams, this is the full linkage solution in one pack.

Key Features

• 70mm steel threaded rod (M4) — 2.75-inch rod included, ready to install with no additional hardware needed
• Adjustable taper washers — conform to the angle of your control surface for a flush, gap-free mount on angled or beveled surfaces
• Brass 3mm pushrod (M3 × 32mm) with wire pass-through hole — accepts wire for additional linkage routing or retention
• 3mm brass ball link — fits standard 3mm threaded pushrod ends for smooth, low-friction pivot at the servo connection point
• M4 × M3 adapter piece (12mm center-to-center) — bridges the rod to the ball link with a 3mm screw and nut included
• Red anodized aluminum components — lightweight, corrosion-resistant, and visually distinctive on your build
• Complete one set per pack — everything needed for one control surface linkage run

Specifications

• Threaded rod: M4 × 70mm steel (2.75 inches)
• Brass pushrod: M3 × 32mm with wire pass-through hole
• Ball link thread size: 3mm (fits standard 3mm pushrod ends)
• Adapter piece: 4mm × 3mm, 12mm center-to-center
• Ball link hole: 3mm
• Opening hole: 3.5mm, length 23mm
• Closed loop extender: M3 × 32mm
• Horn base bolt-through ball hole: 3mm, length 27mm
• Horn material: Red anodized aluminum
• Total system weight: 13 grams (0.46 oz)
• Recommended aircraft size: 35cc to 100cc
• SKU: GRC-CH-225
• Sold as: 1 × complete control horn set

What's Included

• 1 × M4 × 70mm steel threaded rod (2.75 inches)
• 1 × M3 × 32mm brass pushrod with wire pass-through hole
• 1 × 3mm brass ball link
• 1 × M4-to-M3 adapter piece (12mm center-to-center)
• 1 × M3 screw and nut (for ball link attachment)
• Adjustable taper washers for gap-free surface mounting

Required to Complete

• Servo with compatible output arm geometry for your aircraft size
• Pushrod or Z-bend wire if extending beyond the included rod length
• Mounting screws appropriate for your control surface material
• Backplate or reinforcement (recommended for foam or balsa surfaces)

Best For

• Gas and glow-powered RC aircraft in the 35cc to 100cc engine size range
• Builders who want a classy, complete linkage solution without sourcing individual components
• Elevator, rudder, and aileron control surface connections requiring a ball link pivot
• Aircraft with angled or tapered control surfaces where standard flat washers leave gaps
• Sport, aerobatic, and large-scale builds where a polished, finished appearance matters

Installation Notes

• Use the adjustable taper washers to match the bevel of your control surface before final tightening — this eliminates slop and rocking at the horn base
• Align the horn pivot point directly over the control surface hinge line for accurate throw geometry
• The brass ball link accepts standard 3mm threaded pushrod ends — verify your servo pushrod hardware is 3mm threaded before ordering
• The wire pass-through hole in the brass rod can be used for a safety wire or to route a secondary return linkage
• Apply thread-lock sparingly to the M3 screw securing the ball link adapter to prevent vibration loosening in flight
• Confirm full deflection in both directions is smooth and unrestricted before flight

Why Choose an Adjustable Taper-Washer Control Horn?

Most standard control horns mount flat against the control surface — which works fine on flat surfaces but leaves a visible gap and potential rocking point on any surface with a taper, bevel, or compound angle. The adjustable washer system on this horn solves that directly: the washers conform to the surface angle, pulling the entire base into full, flush contact. Combined with the ball link pivot and aluminum construction, this is a noticeably more refined installation than a basic nylon horn — appropriate for the 35–100cc aircraft class where hardware quality is expected to match the rest of the build.