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

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

Answer: When your RC plane rolls left as you increase throttle, the most common cause is torque from the propeller. The engine’s rotation creates a reactive force that tends to roll the plane opposite to the propeller’s spin direction. To fix this, first check your plane’s setup: ensure the control surfaces, especially ailerons and trims, are correctly centred on the ground. Next, try adding a small amount of right aileron trim or adjust the control throws slightly to compensate for the left roll. Also, verify the motor is securely mounted and the propeller is balanced, as vibration can worsen control issues. For a more permanent fix, some pilots apply a slight right wing incidence or use a thrust line angled to counteract torque. Finally, practice gradual throttle increases to get used to the plane’s behaviour. If the problem persists, consult your plane’s manual or community forums for model-specific advice.