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 engine’s rotation creates a reactive force that tends to roll the plane opposite to the propeller’s spin direction, commonly causing a left roll if your prop spins clockwise from the front. To correct this, first check your trim settings on the transmitter and adjust the ailerons slightly right. If trimming isn’t enough, add a small amount of right aileron or rudder input when applying throttle. Also, verify the motor and propeller are installed correctly and not damaged. If your plane has adjustable control surfaces, you can set a slight right trim on the ground. Finally, consider flying with some right rudder input during throttle-up to counteract the torque. These steps should help stabilise your plane’s roll when you increase power.