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 and motor. The spinning propeller creates a reactive force that tends to roll the plane in the opposite direction. To address this, first check the direction your propeller spins and ensure it matches your plane’s setup. Next, adjust the aileron trim or use differential aileron throws to counteract the roll. If your transmitter allows, set up throttle-based trim or mixing so ailerons compensate automatically as you increase throttle. Also, verify that your motor and propeller are properly aligned and balanced to reduce unwanted torque. Finally, make small test flights after each adjustment, gradually fine-tuning the controls until the roll disappears. This approach will help you maintain stable flight when throttling up.