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

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 effects from the motor and propeller. The rotating propeller creates a force that tries to roll the plane in the opposite direction. To fix this, first check if your plane’s trim settings are correct—use the aileron trim to counter the roll. If trimming isn’t enough, try adjusting the control surfaces slightly to compensate. Also, verify the motor and propeller are mounted correctly and that the propeller is balanced; an unbalanced prop can cause uneven forces. If your plane has adjustable thrust angles, setting a slight right thrust angle can counteract the left roll. Finally, consider the plane’s weight distribution—ensure it’s balanced side-to-side. By systematically trimming, checking hardware, and adjusting thrust angles, you can reduce or eliminate the left roll when throttling up.