Futaba GY611_S9256 Tail Gyro (GY611) plus S9256 Digital Servo Set  [GY611_S9256]

Futaba GY611_S9256 - GY611 Gyro + S9256 Servo
Price:
NZD$676.12
Brand:
Futaba
Model:
GY611_S9256
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Tail stabiliser and servo combo for RC helicopters

The Futaba GY611_S9256 package links the GY611 yaw-rate sensor and amp to the S9256 digital servo to form a matched tail control system for radio control helicopters. The gyro features a 12-bit A/D converter and microcomputer control loop to help reduce neutral rudder drift, while the S9256 offers compatibility with Futaba narrow-pulse signal formats and a cooled Alumite servo case.

Key focus areas are sensor fidelity and servo response: the GY611 leverages SMM sensor elements and an AVCS angular vector control algorithm to deliver reliable angular velocity detection and low drift, while the S9256 supplies fast, compatible actuation. Correct installation and incremental tuning will cut in-flight rudder trimming for most airframes.

Included in the box

  • Futaba GY611 sensor and control amp
  • Futaba S9256 digital servo
  • Mini screwdriver
  • Three sections of double sided tape
  • Instruction sheet

Specifications

  • Item GY611 gyro (yaw-rate) and S9256 digital servo set
  • Model Number GY611_S9256
  • Material Alumite case on servo, low-back aeroform case on gyro
  • Power GY611 operating voltage DC 3.8V-5V, S9256 requires 4.8V Rx battery only
  • Gyro features 12-bit A/D, SMM sensor, AVCS (heading-hold style) control
  • Servo performance 0.06 sec/60° (at 4.8V), torque 47 oz-in (3.4 kg-cm) at 4.8V
  • Dimensions Amp: 57 x 32 x 15 mm, Sensor: 30 x 30 x 18 mm, Servo: 40 x 20 x 36.6 mm
  • Weight Amp 34 g, Sensor 30 g, Servo 57 g
  • Compatibility Model helicopters, yaw/tail stabilisation systems

Use this Futaba set as a matched tail stabilisation solution: mount the amp and sensor close to the tail assembly, power the servo from a regulated 4.8V receiver pack, and follow the manual for servo endpoints and gradual gyro gain adjustment to reach neutral rudder behaviour.

How should the GY611_S9256 components be positioned on the airframe?

Position the sensor and amp close to the tail boom but isolated from major vibration sources; use the supplied tape or mounting hardware to keep the units secure and aligned per the manual.

What is the recommended first-pass gyro gain procedure?

Start with the manual's baseline gain, hover and observe for drift, then increase gain in small steps until the tail holds without oscillation; record each change to find the best setting for your model.

How responsive is the S9256 with Futaba narrow pulses?

The S9256 is optimised for Futaba super-narrow pulse drive, delivering the quick servo motion needed for tight tail correction when paired with the GY611.

Can higher voltage be used to speed the servo?

No. The S9256 is specified for a 4.8V receiver battery only; higher voltages risk damage and are not recommended by the product notes.

What routine checks help long-term reliability?

Inspect servo mounting, check wiring and connectors, ensure the amp and sensor remain secure, and verify the servo operates smoothly at neutral during preflight checks.

Are there thermal or vibration limits to consider?

The servo’s Alumite case helps dissipate heat and the gyro’s low-back aeroform case reduces vibration pickup; still, mount carefully and avoid routing power leads near high-heat components.

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