What causes jittery servos on an FPV wing and how to fix them?

Question: What causes jittery servos on an FPV wing?

Answer: Jittery servos on an FPV wing are usually caused by electrical noise, poor signal quality, or mechanical issues. First, check your power supply: ensure your servos receive a stable voltage, ideally from a dedicated BEC or LiPo battery, to avoid voltage drops that cause jitter. Next, inspect the servo signal wires and connectors for loose or damaged connections. Use twisted or shielded cables to reduce interference. Also, verify your flight controller or receiver is properly grounded and that the servo signal output is clean—sometimes adding a small capacitor (e.g., 0.1µF) across the servo power leads helps smooth noise. Mechanically, check the servo horn and linkage for tightness and smooth movement; any binding or excessive friction can cause erratic motion. Finally, if you use a PWM controller or mixing software, ensure the settings are correct and the servo endpoints and trims are calibrated. Following these steps usually resolves jitter and improves servo performance on FPV wings.