Why Does My RC Plane Roll Left When I Increase Throttle?

Question: Why does my RC plane roll left when I throttle up?

Answer: When your RC plane rolls left as you increase throttle, it’s usually due to torque and P-factor effects from the propeller. The spinning propeller generates torque that tries to roll the plane in the opposite direction, often causing a left roll if your prop spins clockwise (from the pilot’s perspective). To correct this, first check that your control surfaces are properly trimmed with the plane stationary. Then, try adding a small amount of right aileron trim to counteract the left roll during throttle increase. If your transmitter allows, program throttle-to-aileron mixing to automatically apply right aileron as throttle rises. Also, ensure your motor and propeller are correctly installed and balanced to avoid excessive vibration or uneven thrust. Finally, consider adjusting the throttle curve to reduce sudden power spikes. By following these steps, you can minimise unwanted rolling and improve your plane’s handling during acceleration.