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: When your RC plane rolls left as you increase throttle, it is usually due to torque and P-factor effects caused by the propeller. The engine's torque tends to roll the plane opposite to the propeller rotation, which is often to the left. To correct this, first check your control surfaces to ensure they are properly aligned and centred at neutral throttle. Next, adjust the trim on your transmitter to counteract the roll. If possible, add a small amount of right aileron trim to balance the torque effect. Additionally, slightly rigging the wing with a small amount of washout (twist) or adjusting the thrust angle on the motor mount can help. Finally, practise smooth throttle increases to reduce sudden torque effects. If problems persist, consider using a propeller with less aggressive pitch or switching to a counter-rotating propeller if available. These steps should help maintain stable, level flight as you increase throttle.