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.
Included high-speed S9254 Digital Servo boasts 47 oz-in torque and a
speed of .06 sec/60¢X
Remote Gain Function and Mode Switching Function Remote: Gain
function allows sensitivity switching from the transmitter and mode
switching function allows AVCS/normal gyro mode switching.
Integrated, compact and lightweight design made possible by high
density mounting technology.
Conductive Resin Case: This case improves EMC (Electrostatic and
electromagnetic interference) resistance.


INCLUDES: One GY401 gyro
One S9254 Digital servo, available separately FUTM0224
One .81" (20.5mm) round servo horn, one 1.8" (45mm) round servo horn
one 1.25" (32mm) 6 point servo horn, one 1.5" (39mm) 4 point horn,
mounting hardware
One mini plastic adjustment screwdriver
Three mounting pads
One instruction sheet


SPECS: GY401 Gyro- S9254 Digital Servo
Length: 1.1" (27mm) 1.6" (40mm)
Width: 1.1" (27mm) .79" (20mm)
Height: .79" (20mm) 1.4" (36.2mm) not including horn
Weight: .95oz (27g) 1.8oz (50g)
Torque: 47 oz-in
Speed: .06 sec/60¢X