Futaba S9257 EP Heli Digital Rudder Servo for Gyro-Controlled Helicopters  [S9257]

Precision rudder servo for gyro-controlled helicopters

The Futaba S9257 EP is a compact, high-speed digital rudder servo engineered for RC helicopter gyro operation. It connects directly to Futaba gyro units to deliver accurate tail control when used with a suitable gyro.

Key mechanical details and included items are taken from the original product information: the servo is supplied with multiple horn types and mounting hardware, and it uses a dual ball bearing arrangement to smooth the output shaft. The unit is specified for FM, PCM and HRS systems only and must not be used with AM systems.

Installation requires connection to a compatible gyro such as the Futaba GY401 series or the GY502, and basic tail linkage adjustment plus endpoint tuning are recommended when fitting the servo into a helicopter tail assembly. Use standard tail servo mounts and check radio travel limits to avoid overtravel.

Compatibility

This servo is specified for use with the Futaba gyro products listed above and for tail control in electric-powered model helicopters. A gyro connection is required for correct operation, and radio compatibility is limited to FM, PCM and HRS systems.

The S9257 is a focused rudder servo for pilots using Futaba gyros in scale and sport RC helicopters, offering compact size, included mounting hardware and multiple horn choices for tail linkage setups.