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 creates a torque reaction that tries to roll the plane in the opposite direction of the propeller’s rotation, typically causing a left roll if your prop spins clockwise from the front. To correct this, first check your trim settings and adjust the ailerons slightly right to counter the roll. Next, try adding a small amount of right rudder input during throttle-up to balance the yaw and roll forces. Also, verify your motor and propeller are properly aligned and that the plane’s centre of gravity is correctly positioned. If you are using a high-power motor, consider adding a slight right thrust angle by mounting the motor a few degrees to the right to neutralise torque effects. Finally, practise smooth throttle increases rather than sudden bursts to maintain better control. These steps should help keep your plane flying straight as you gain speed.