Futaba GY520_S9257 Paired Heading-Hold Gyro & S9257 High Speed Servo  [GY520_S9257]

Futaba GY520_S9257 - GY520 Heading Hold Gyro + S9257 High Speed Digital Servo for Helicopter Gyro Operation
Price:
AUD$332.14
Brand:
Futaba
Model:
GY520_S9257
Condition:
Brand New
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Integrated heading-hold gyro matched to a fast tail servo

The Futaba GY520_S9257 bundle pairs the compact GY520 heading-hold gyro with the S9257 high speed digital servo, intended for RC-scale helicopter tail control and gyro-assisted tail-hold tasks. The two components are sold together as a matched set to simplify fitting a reliable heading-hold solution on an RC helicopter tail assembly.

The GY520 is a single-unit heading-hold gyro that integrates sensor and control electronics using a MEMS sensor and an advanced PID control algorithm. It supports selectable F3C and 3D modes, six programmable parameters, and high update rates (280 Hz in 1520 µs mode and 506 Hz in 760 µs mode). Programming can be performed from the unit’s button and multi-color LED or via a PC using Futaba CIU-2 USB adapter. The gyro implements an AVCS angular velocity control architecture intended to improve tail holding performance when paired with a suitable tail servo.

The S9257 is a high speed digital tail servo supplied with multiple horns and mounting hardware, designed to interface with compatible helicopter gyro systems. It includes two ball bearings to support the output shaft and is intended for direct connection to a gyro-controlled tail setup. Both items are RC-scale components for model helicopter use only.

Included in the box

  • Futaba GY520 Heading Hold Gyro, instruction manual, two 13" (330mm) leads with red and black connectors, two sections of sensor tape, mini screwdriver.
  • Futaba S9257 High Speed Digital Servo, .83" (21mm) round horn, 1.5" (39mm) four-point horn, 1.2" (32mm) six-point horn, mounting hardware, lead, precaution sheet.

Key specifications

  • Item Futaba GY520 heading-hold gyro and S9257 high speed digital servo
  • Model Number GY520, S9257
  • Material MEMS sensor based control electronics (gyro)
  • Size (Gyro) 0.82 x 0.82 x 0.43" (20.8 x 20.8 x 11 mm)
  • Voltage Range (Gyro) 3.8 - 6.0 V DC
  • Control System (Gyro) Advanced PID control
  • Current Draw (Gyro) 40 mA (without servo)
  • Sensor Type (Gyro) MEMS vibrating structure gyro
  • Sensor Rate Range +/- 800 °/sec
  • Operating Temperature 14°F - 113°F (-10°C - +45°C)
  • Servo Dimensions 1.4 x 0.6 x 1.1" (36 x 15 x 29 mm)
  • Servo Weight 0.92 oz (26 g)
  • Servo Torque 28 oz-in (2.0 kg-cm) at 4.8 V
  • Servo Speed 0.08 sec/60° at 4.8 V
  • Servo Lead Length 7.9" (200 mm)
  • Bearings (Servo) Two ball bearings

A Futaba matched gyro and servo set suitable for RC helicopter tail applications where a compact MEMS heading-hold unit and a fast digital servo are required.

What electrical supply does the GY520 require?

The GY520 operates on 3.8 to 6.0 V DC. Ensure your receiver or BEC provides a stable voltage within this range to avoid erratic gyro behavior.

Will the S9257 work with older analog gearboxes?

The S9257 is a digital servo and will function when connected to standard receiver outputs, including those from analog systems. Follow the gyro wiring guide to ensure correct signal routing.

How do I update gyro parameters for different flying styles?

Use the GY520's button and LED to cycle and set parameters for modes like F3C or 3D. For more precise tuning, connect the gyro to a PC with the Futaba CIU-2 adapter and adjust settings there.

Does the S9257 include mounting screws?

Yes. The servo package includes mounting hardware to secure the S9257 in standard tail servo locations along with the accessory horns.

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