Why does my RC plane roll to the left when I increase throttle?

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

Answer: A left roll when applying throttle is usually caused by torque and P-factor effects from the propeller. The engine’s rotation creates a torque that rolls the plane in the opposite direction. Additionally, asymmetric thrust (P-factor) can push the plane to one side, often to the left if your prop spins clockwise from the front. To correct this, first check your control surfaces to ensure they are neutral and properly trimmed. Next, try adding a small amount of right aileron trim or slightly adjust the rudder to the right to counteract the roll. If your plane has adjustable motor mounts, angle the motor slightly to the right to offset the torque. Also, verify the propeller is installed correctly and not damaged. Finally, practise gentle throttle increases to get a feel for the plane’s behaviour. These steps should help you maintain a stable flight path when powering up.