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Futaba - FUTM0808   513886202193 4513886202193
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Futaba GY401 Gyro w/S9254 Digital Servo
Futaba GY401 Gyro w/S9254 Digital Servo
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Instruction Manuals: Manual 1 (240 KB)

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Tech Notes
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.


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
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.
One year warranty


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


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


Can be used in helicopters and airplanes (Due to 0-100% Gain Adjust).
The new SMM (Silicon Micro Machine) technology is the integration
of mechanical elements, sensors, actuators and electronics all
brought together on a common substrate chip. This hobby industry
first, results in a gyro sensor with an unprecedented level of
functionality, reliability, and sophistication.
This will not work with JR Digital servos. These have a different
Voltage- use only with a 4.8V battery. (if you use it with a
higher voltage battery it needs to be regulated to 5.2V).
jxs 2/24/04
updated jpg 3/16/06
updated jpg 5/23/13

– If you need more information, use these Futaba resources –
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Phone: 217-398-8970
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