How to Fix RC Helicopter Tail Rotor: A Step-by-Step Guide

How to Fix RC Helicopter Tail Rotor: A Step-by-Step Guide

RC helicopters are exciting to play with and can be incredibly fun for enthusiasts of all ages. However, one of the most common issues reported by users is a malfunctioning tail rotor, which can lead to instability, reduced control, and even crashes. Therefore, knowing how to fix the tail rotor is essential for anyone who owns an RC helicopter. Fortunately, fixing the tail rotor is a relatively simple process that can be done quickly and easily with just a few basic tools. In this guide, we will take a step-by-step look at how to fix an RC helicopter tail rotor, covering everything from diagnosing the issue to lubricating and testing the rotor for optimal performance. Whether you’re a seasoned hobbyist or a curious beginner, this guide will provide you with all the information you need to fix your RC helicopter’s tail rotor and get back to flying with confidence.

Diagnosing the Issue

Before you start the process of fixing your RC helicopter’s tail rotor, it is important to diagnose the problem correctly. Here are some common signs indicating a malfunctioning tail rotor:

  • The helicopter wobbles or shakes excessively during flight
  • The helicopter doesn’t respond or moves slowly as you move the sticks on the remote control
  • The tail of the helicopter vibrates when you hold it

If you detect any of these signs, the tail rotor may be the likely culprit. It’s essential to visually inspect the tail rotor for any damage, verify the alignment of the blades, and check for loose or damaged parts. There are many online resources available that can help you with the process of inspecting and troubleshooting your helicopter. HeliFreak, for example, is an online forum that offers a wealth of information on fixing and maintaining RC helicopters. In addition, you may find it helpful to watch instructional videos by experts on YouTube, or refer to the documentation that came with your helicopter. With the help of the internet and other resources, you can easily diagnose the issue with your tail rotor and start fixing it right away.

What is the possible problem of defective rotor?

Some possible problems of a defective rotor include:

  • Decreased brake performance
  • Vibration or shaking in the steering wheel
  • Noise or squeaking while braking
  • Uneven wear on brake pads
  • Wobbling or uneven tire wear

If you experience any of these issues, it is important to have your rotor inspected and potentially replaced by a professional mechanic. This will ensure the safety and reliability of your vehicle.

If you need to purchase new rotors, there are many reliable online retailers such as AutoZone, O’Reilly Auto Parts, and RockAuto that offer a wide selection of high-quality products.

Replacing Broken Parts

If you have determined the tail rotor is broken, replacement is likely necessary. Here are the steps required to replace the broken tail rotor:

Tools Required Parts Required
Screwdriver New tail rotor blades
X-acto knife or scissors

Replacement Steps

  1. Remove the damaged blades from the rotor head
  2. Take the new tail rotor blades and gently slide them into place on the rotor head. If your rotor has a spinner, make sure the blades are aligned with the spinner.
  3. Secure the new blades by tightening their screws gently but firmly.
  4. Ensure the joint between the rotor head and tail rotor is tight and there is no play between them.
  5. Test the new tail rotor blades to ensure they are securely in place and spin smoothly.

It is important to note that different types of helicopters may have different tail rotor blade styles, and you should always ensure you purchase the appropriate replacement blades for your model. Websites such as Amazon and eBay offer a range of options and reasonable prices for rc helicopter parts and components.

What to do if tail rotor fails?

  • Immediately reduce speed and pitch
  • Apply as much power as possible without causing over-torque
  • Use the pedals to maintain yaw control using the main rotor
  • Search for a safe landing spot
  • Perform autorotation landing if possible

For more detailed information and guidelines, refer to the Federal Aviation Administration (FAA) Helicopter Flying Handbook.

Adjusting the Tail Rotor

If your tail rotor is misaligned, it can cause instability in flight. Follow these steps to fix the issue:

Adjustment Steps

  1. Locate the screws that need adjusting. These are usually on a plate near the tail rotor hub.
  2. Loosen the screw on the side where the blade is lifted.
  3. Tighten the screw on the side where the blade is low.
  4. Check the alignment by eye or with a measuring tool. A straightedge works well for this purpose.
  5. Adjust the screws again if necessary until the tail rotor blades are aligned precisely with the main rotor.
  6. Double-check that everything is tightened securely before putting the helicopter back in the air.

Some rc helicopter models may require additional adjustment and manipulation of the tail rotor to achieve proper alignment. If you are unsure about how to adjust the tail rotor, refer to the instruction manual or seek help from an experienced rc helicopter hobbyist or professional. Online forums such as RcGroups and Helifreak offer helpful tips and advice from the rc helicopter community.

How is tail rotor drift corrected?

Tail rotor drift is a common issue experienced by helicopter pilots during flight. It occurs when the tail of the helicopter starts drifting in the opposite direction of the main rotor blades. This can be quite dangerous and needs to be corrected before any serious consequences occur. Here are some ways to correct tail rotor drift:

  • Adjust the trim: Pilots can adjust the pitch of their tail rotor blades to reduce drift.
  • Decrease collective pitch: This reduces the lift and makes it easier to correct drift.
  • Change the rotor speed: By changing the rotor speed, pilots can change the torque generated by the main rotor blades, which can help to correct drift.
  • Hover taxi: In some cases, hovering slightly below the normal altitude and gradually increasing the speed can help to correct drift.

It’s important that pilots receive proper training and have the necessary skills to correct tail rotor drift. Some companies, such as Heli-Center Aviation, offer tailored training programs and courses specifically designed to help pilots learn how to manage and correct drift.

Lubricating the Tail Rotor

Keeping your tail rotor lubricated is essential for its smooth operation. Here’s how to lubricate your rc helicopter’s tail rotor:

Lubrication Steps

  1. Determine the tail rotor bearings that require lubrication. Check the instruction manual for guidance if necessary.
  2. Remove any cover or casing protecting the bearings and expose them for lubrication.
  3. Apply a small amount of lubricant to each exposed bearing. Avoid using too much as this can attract dust and debris, causing more problems in the future.
  4. Using a clean cloth, wipe off any excess lubricant that may have spilled onto the tail rotor blades.
  5. After lubricating, reassemble any parts that were removed and perform a test flight.

It’s important to use the right type of lubricant when maintaining your rc helicopter’s tail rotor. Consult the instruction manual to determine what type of lubricant is recommended. Additionally, some lubricants may not be suitable for certain tail rotor models, so exercise caution before using a new type of lubricant. Online retailers such as Tower Hobbies and Horizon Hobby offer a range of rc helicopter lubricants and maintenance products.

Can a helicopter fly without a tail rotor?

Yes, a helicopter can fly without a tail rotor but the aircraft’s yaw control will be compromised. The tail rotor is responsible for controlling a helicopter’s yaw, or its rotation around the vertical axis. Without it, the helicopter will experience uncontrolled spinning, making it difficult to maneuver safely.

There are other technologies being developed to replace the traditional tail rotor, including NOTAR (NO TAil Rotor) and Fenestron systems. These use alternative methods to control yaw, such as a directed airflow and a ducted tail rotor. However, these systems are not yet as widely used as traditional tail rotors.

For more information about helicopters, you can visit websites such as Vertical Mag, which is a source of news and information for the vertical aviation industry.

Test Flight and Troubleshooting

After fixing your rc helicopter’s tail rotor, it’s important to conduct a test flight before returning it to normal use. Here are some additional tips to ensure a successful test flight:

Test Flight Tips

  • Begin the test flight in an open space with plenty of room for the helicopter to maneuver. Avoid flying in crowded areas or near people, animals, or delicate objects.
  • During takeoff, observe the tail rotor’s movement for any signs of wobbling or unresponsiveness. If you detect any issues, land the helicopter immediately and recheck the tail rotor.
  • During the test flight, monitor the helicopter’s performance and make note of any unusual sounds or movements.
  • Before landing, practice slow and steady descents to ensure that the tail rotor is functioning correctly.

If you encounter any issues during the test flight, here are some common troubleshooting tips:


  • Check for loose screws or bolts on the helicopter body and tail rotor.
  • If the helicopter is still wobbling or unstable, readjust the tail rotor using the adjusting screws.
  • Make sure the pivoting mechanism of the tail rotor is not damaged or excessively worn.
  • Inspect the tail rotor blades for any signs of damage or wear and replace them if necessary.

If you’re experiencing issues beyond what these tips can help with, consider reaching out to an rc helicopter repair expert or contacting the manufacturer of your helicopter. Online retailer websites such as Amazon and Banggood offer a variety of rc helicopter repair kits and tools for those who want to do the repairs themselves.

What is the tail rotor of a helicopter?

The tail rotor is a critical component of a helicopter that provides stability and directional control. It is a small rotor mounted on the tail of the helicopter that rotates perpendicular to the main rotor blades. The tail rotor helps counteract the torque produced by the main rotor blades and allows the helicopter to turn and hover in any direction.

It is essential to maintain and replace the tail rotor regularly to ensure proper functioning of the helicopter. There are various products and services available online that cater to the needs of helicopter enthusiasts and professionals, such as rotor blades, tail rotor assemblies, and maintenance services. Websites like offer a wide range of helicopter parts and services from trusted brands.


Fixing an rc helicopter tail rotor may seem like a daunting task, but with the proper tools and a step-by-step guide like this one, it’s a manageable DIY repair. Remember to always diagnose the issue before beginning any repair work and to use caution during test flights. Lubrication is also important for the smooth operation of your helicopter’s tail rotor. If you encounter any issues beyond your skill level, don’t hesitate to reach out to a professional for help.

Additional Resources

  • YouTube: Many rc helicopter enthusiasts share their tips and tricks on their YouTube channels. Search for “rc helicopter tail rotor repair” to find helpful videos.
  • Online Forums: Websites like RC Groups and Helifreak offer forums where users can ask questions and share their experiences with repairing rc helicopters.
  • Manufacturer’s Website: Many rc helicopter manufacturers provide online product manuals that include repair guides and troubleshooting tips.

With a little know-how and the right tools, you can fix your rc helicopter tail rotor and get back to enjoying smooth and stable flights.