High-Pitched Noise from RC Helicopter, Help Needed!

[Alexei]

Hey everyone, need some advice. My RC helicopter started making a high-pitched noise recently. It still flies fine, but the noise is annoying. Any ideas on what might be causing it or how to fix it?

[thegodofclod]

Check the rotor blades for any damage or imbalance. Sometimes, a small nick can cause strange noises. Also, make sure all screws are tightened.

[JatoTheRipper]

If the noise persists, you might want to lubricate the rotor shaft and bearings. It could be a friction issue causing the high-pitched sound. Give it a try and see if it makes a difference. Good luck!