Futaba GY520_S9257 Matched Heading-Hold Gyro with S9257 Tail Servo  [GY520_S9257]

Futaba GY520_S9257 - GY520 Heading Hold Gyro + S9257 High Speed Digital Servo for Helicopter Gyro Operation
Price:
NZD$411.46
Brand:
Futaba
Model:
GY520_S9257
Condition:
Brand New
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Compact heading-hold unit with a responsive 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.

What the pack contains

  • 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.

Technical details

  • 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 matched Futaba set for RC helicopter tail control combining a MEMS heading-hold gyro and a high-speed digital tail servo, suited to pilots seeking stable headings and quick tail response.

Where should I place the GY520 sensor to reduce vibration effects?

Place the GY520 on a low-vibration zone of the fuselage using the provided sensor tape. Avoid direct mounting on open motor mounts and secure leads to eliminate movement that can affect readings.

How robust is the S9257 under repeated aerobatic use?

The S9257 is built as a high speed digital servo with two ball bearings for the output shaft. It is designed for frequent movement, but check torque and mounting for heavy tail loads to ensure long life.

What programming options are available for fine tuning?

Tuning can be done via the single button and LED on the GY520 for quick adjustments, or you can use the Futaba CIU-2 USB adapter with a PC for more detailed parameter changes.

Are spare horns included with the S9257?

Yes. The S9257 package includes a .83" round horn, a 1.5" four-point horn, a 1.2" six-point horn plus the necessary mounting hardware and a precaution sheet.

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