S9257 Futaba EP Heli Digital Rudder Servo — Compact High-Speed Tail Unit  [S9257]

Compact digital rudder servo built for gyro control

The Futaba S9257 EP serves as a small, high-speed digital rudder servo tailored for RC helicopter gyro use. It is intended to interface with Futaba gyro gear to give clean, responsive tail control when matched with a suitable gyro.

Mechanical highlights and contents are provided from the original product data: the servo ships with several horn options and mounting hardware, and it employs a dual ball bearing setup for steadier shaft movement. The unit is intended for FM, PCM and HRS radio systems only and should not be connected to AM equipment.

For installation, connect the servo to an appropriate gyro such as the Futaba GY401 range or the GY502. Carry out basic tail linkage setup and endpoint adjustment during integration, and verify radio travel settings to avoid mechanical overtravel.

Compatibility

The S9257 is specified for use with the Futaba gyro models listed above and for tail control in electric model helicopters. Correct operation requires a gyro connection and the radio compatibility is limited to FM, PCM and HRS protocols.

Overall, the S9257 is a purpose-built rudder servo for pilots using Futaba gyros, offering a compact footprint, dual bearings and multiple horn options for flexible tail linkage setups.