FUTABA GY401 Gyro AVCS

This is the Futaba GY401 Gyro with an S9254 Digital Servo.
This is a high performance, compact and lightweight
(AVCS) Angular Vector Control System gyro developed for model helicopters.
Because the sensor and control circuit are integrated, it is simple to install.
FEATURES: AVCS System: Since the rudder trim changes (caused by wind and other
meteorological changes) the front, rear, and other heli attitudes
change and are automatically cancelled; tail (rudder) operation is
easy, making it perfect for 3D flight.
(also known as heading hold gyro)
SMM Gyro Sensor: Use of this newly developed technology virtually
eliminates rudder trim changes during flight (see COMMENTS).
Digital Servo Compatible (DS Mode): DS mode makes it compatible with
Futaba Digital Servos. This maximizes the high-speed response
performance of the Digital Servo.