Futaba S9257 EP Heli Digital Rudder Servo — High-speed digital rudder servo for helicopter gyro control  [S9257]

High-speed rudder servo for helicopter gyros

The Futaba S9257 EP is a compact high-speed digital rudder servo intended for RC helicopter gyro operation. It is designed to work directly with Futaba gyro units and to provide precise tail control when linked to 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 for smoother shaft operation. The unit is intended 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 and endpoint tuning are recommended when integrating the servo into a helicopter tail assembly. Use standard tail servo mounting and verify travel limits in your radio to prevent overtravel.

Compatibility

This servo is specified for use with Futaba gyro products listed above and for tail control in electric powered model helicopters. Connection to the gyro is required for proper operation, and radio system compatibility is limited to FM, PCM and HRS types.

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