Futaba S3155 Compact Digital HS Wing Servo  [S3155]

Slim Profile Servo for Wing Bays

The Futaba S3155 Digital HS Wing Servo is intended for wing-mounted tasks on sailplanes, electric props and small jets. Its compact dimensions make it straightforward to fit into narrow bays while maintaining crisp, high-speed control.

Solid Gear Train and Versatile Horns

Designed with dust and splash resistance, this servo is not rated as waterproof. The internal metal gearing (FUTM3331) provides a tough drivetrain for repeated use. The package includes a 1" (25.4mm) 4-arm horn already fitted, plus a 1.5" (39mm) 4-arm horn, a 1.75" (45mm) straight horn and a 1.4" (35mm) round horn to suit different linkage layouts.

For builders fitting servos into tight wing cavities, the Futaba S3155 gives a good mix of speed and robust metal gears for dependable in-flight performance.