Futaba GY401+S9257 AVCS Gyro with S9257 High Response Servo  [GY401+S9257]

Crisp tail response from the Futaba GY401+S9257 kit

The Futaba GY401+S9257 kit combines the GY401 AVCS gyro and the S9257 digital servo to tighten tail behaviour and reduce pilot workload. This pairing aims to deliver quick, accurate yaw corrections for routine flying and sport manoeuvres.

Key points about the GY401 AVCS gyro

The compact GY401 fits neatly into small heli frames while offering the Angular Vector Control System to automatically correct rudder trim changes from gusts or rotor torque. SMM tech helps suppress small trim shifts so the helicopter tracks cleaner in flight.

S9257 digital servo performance notes

The S9257 provides fast, steady actuation to match the gyro's inputs. With 23oz-in of torque and a 0.08 sec/60 deg speed across a 4.8V to 6.0V range, the servo supports swift stick response with controlled endpoint behaviour.

If you want a balanced combination of quick servo action and gyro stability, the Futaba GY401+S9257 is a practical kit for pilots aiming to sharpen tail control without excessive tuning time.