Control Horn for RC Plane Nylon with Screws - Large Size

Specifications:

• Material: High-Density Nylon 
  
• Size Class: Large L17.5 x W13 x H26mm
  
• Mounting Type: 2-Screw Through-Hole with Locking Backplate
  
• Adjustment: 4 Vertical Holes for Throw/Torque Tuning
  
• Base Dimensions: Approx. 18mm x 12mm
  
• Total Height: Approx. 28mm - 32mm
  
• Screw size: 2 X 14mm
• Compatibility: Fits standard 1mm-1.2mm Clevis pins and Z-bends

Applications:

• Scratch-Built RC Planes: Essential hardware for Coroplast (Spad), Depron, and Balsa constructions.
  
• Scale Models: Perfect for 1/10 scale replicas (e.g., Cessna, Piper Cub) needing strong, hidden linkages.
  
• FPV Wings: Heavy-duty control for long-range wings carrying heavy camera/battery payloads.
  
• Repair & Upgrade: The ideal replacement for snapped stock horns on Ready-to-Fly (RTF) models.

Project Evolution:

• Prerequisites: Moving up from small park flyers where glue-on horns were sufficient.
  
• Feature Upgrade: This hardware unlocks the ability to build High-Wing Trainers and Sport Aerobatic planes. It allows you to use higher torque servos (Standard size, up to 3kg) without stripping the hardware connection.
  
• Effort Level: Intermediate. Requires drilling precise holes through the control surface.
  
• Minimum Hardware: 1.5mm Drill bit, Phillips Screwdriver, Clevis/Pushrod set.

Virtual Technician & Wiring Guide

• ⚠️ Installation Warning: Do not over-tighten the screws! Tighten until the backplate is flush and secure against the foam/wood. Crushing the material too much will weaken the control surface hinge.
  
• Alignment: The holes of the control horn must align directly over the hinge line for symmetrical movement.
  
• Security: For gas/nitro planes, apply a drop of thread locker or CA glue to the screw threads to prevent vibration loosening. Probots™ Secure-Transit ???? guarantees you receive the full screw set.

Package Includes: 

2 X Control Horn for RC Plane Nylon with Screws - Large Size

4 X M2 X 15mm Screws

Frequently Asked Questions (FAQ)

1. What is the exact height of this control horn?
   It measures approximately 28mm to 32mm from the base, giving excellent leverage for large surfaces.
2. Does this work with standard 1.2mm pushrods?
   Yes, the holes are sized to accept standard Z-bends or 1.2mm clevis pins perfectly.
3. Can I use this on a foam board (Flite Test) plane?
   Yes, but the screws might be long for 5mm foam. You may need to trim the screws or use a washer/spacer.
4. Is glue required for installation?
   Technically no, as it uses screws. However, adding a drop of CA glue between the base and foam adds extra security.
5. How many screws are included per horn?
   Each horn comes with 2 mounting screws and 1 matching backplate.
6. Will this fit a 9g micro servo?
   It is likely too large and heavy for 9g servos. This is better suited for Mini or Standard size servos.
7. What is the distance between the mounting holes?
   The base mounting holes are typically spaced about 8-10mm apart.
8. Can I use this for a rudder pull-pull system?
   No, this is a single-sided horn. Pull-pull systems require a double-sided arm (T-style).
9. Is the nylon fuel resistant?
   Yes, it is resistant to Nitro and Gasoline, making it safe for glow engine planes.
10. Does it come with the clevis?
    No, this listing is for the Horn, Backplate, and Screws only. Clevis sold separately.
11. Why does it have 4 holes?
    Multiple holes allow you to adjust the mechanical advantage (leverage) and control throw angle.
12. Can I paint these horns?
    Nylon is difficult to paint, but you can dye it with fabric dye if a specific color is required.
13. Is the backplate necessary?
    Absolutely. Without the backplate, the screws will tear through the foam or wood under load.
14. What drill bit size should I use?
    Use a 1.5mm or 2mm drill bit to create pilot holes for the screws.
15. Can I use this on balsa elevators?
    Yes, it is excellent for balsa. Ensure you drill through the hardpoint or plywood reinforcement.
16. How much does it weigh?
    Approximately 5 grams per set, which is negligible for large airframes.
17. Is this compatible with Dubro heavy-duty links?
    You may need to ream (widen) the holes slightly with a drill bit to fit heavy-duty 2mm clevises.
18. Can I cut the top off if it's too tall?
    Yes, Nylon can be trimmed, but ensure you leave enough material above the used hole for strength.
19. Do you sell a smaller version?
    Yes, search for our "Medium" or "Small" Nylon Control Horns for smaller park flyers.
20. Is this product 3D printed?
    No, this is an Injection Molded part, which is significantly stronger and smoother than FDM 3D printed parts.