Why does my RC plane roll left when I increase throttle?

Question: Why does my RC plane roll left when I throttle up?

Answer: A left roll when increasing throttle is usually caused by the engine torque and propeller effects. Most RC planes have clockwise-spinning propellers, which create a torque reaction rolling the plane to the left. Here's how to address it: 1. Check your trim settings—apply slight right aileron trim to counter the roll. 2. Adjust the control throws, increasing right aileron throw slightly if needed. 3. Consider adding a small amount of right thrust by angling the motor mount slightly to the right; this counters torque-induced roll. 4. Ensure your plane is properly balanced; a nose-heavy or tail-heavy model can worsen control issues. 5. If your transmitter has exponential settings, adjust them to smooth out control inputs. 6. Finally, practise gentle throttle increases and smooth control inputs to manage torque effects. These steps should help stabilise your plane when you throttle up.