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 effects from the motor and propeller or aerodynamic factors. Here’s how to diagnose and fix it:

• Check motor torque: The spinning propeller creates a torque that tends to roll the plane opposite to the propeller’s rotation. If your prop spins clockwise (from behind), the plane will want to roll left.
• Adjust trim or ailerons: Use your transmitter’s aileron trim or physically adjust the control surfaces slightly to counteract the roll.
• Set differential thrust or thrust angle: Slightly offset the motor thrust line or add a bit of right thrust by angling the motor mount to counter torque.
• Check for balance issues: Ensure the plane is properly balanced laterally; uneven weight can worsen roll tendencies.
• Test in hover or slow flight: Observe how the plane behaves at different throttle settings to fine-tune adjustments.
By methodically adjusting trim, thrust angle, and checking balance, you can eliminate unwanted rolling when throttling up.