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. The spinning propeller creates a reactive force that tends to roll or yaw the plane in the opposite direction. Here’s how to address it:

1. Check your trims: Make sure your aileron and rudder trims are centred before flight.
2. Adjust control surfaces: Slightly trim or adjust your ailerons and rudder to counteract the left roll during throttle-up.
3. Use differential thrust or control: If your plane has adjustable control throws, reduce the upward deflection on the left aileron or increase it on the right.
4. Consider adding right thrust: Mount the motor with a slight right thrust angle, around 1-2°, to counteract torque effects.
5. Fly and test: Make small adjustments and test fly to find the best balance.
Torque and P-factor are normal for single-prop planes, so minor corrections are common. Following these steps should help your plane fly straight when you throttle up.