Futaba CGY770R 3-Axis AVCS Gyro/Receiver/Governor System with GPB-1 Gyro Program Box

Product Overview

The Futaba CGY770R is a compact, high-performance unit that combines a 3-axis AVCS gyro, a receiver, and a head speed governor. It features cutting-edge MEMS sensor technology, ultra-high-speed processing, and an advanced PID control algorithm, offering superior stability and precise control for flybarless helicopters. The GPB-1 Gyro Program Box facilitates easy setup and tuning of the gyro and governor functions.

Contents

• CGY770R/GPB-1 Set Components
• CGY770R Unit
• GPB-1 Gyro Program Box
• Connection Details
• Specifications
• Warranty & Repair Service
• Compliance Information
• Precautions

CGY770R/GPB-1 Set Components

The CGY770R/GPB-1 Set typically includes:

• CGY770R Unit
• GPB-1 Gyro Program Box
• CGY connection cable (CGY770R to GPB-1)
• Transmitter connection cable (for GPB-1)
• Mounting Pads (x3)
• Dust Covers (x5)
• Manual
• Decal
• Velcro

CGY770R Unit

The CGY770R is a 3-axis Gyro, Governor, and Receiver integrated into a single unit. It is designed for flybarless helicopters and offers advanced stabilization and control.

GPB-1 Gyro Program Box

The GPB-1 is used to set up and tune the CGY770R's gyro and governor functions. It connects directly to the CGY770R. It is not intended for installation on the helicopter itself.

Features

• Integrated System: Combines 3-axis Gyro, Governor, and Receiver in one compact unit.
• High Performance: High-speed operation and extremely low latencies ensure greater stability and precise control.
• Compact & Lightweight: Low profile, small size, and light weight.
• Easy Setup: Intuitive setup and tuning of gyro and governor programs using the GPB-1. Settings are divided into Basic and Expert menus.
• Firmware Updates: Firmware can be updated via a Windows-based personal computer using optional CIU-2 or CIU-3 interfaces.
• Compatibility: S.BUS2 and UR (Ultra Response) System compatible (when used with UR servos for helicopters).
• Gyro Section:
  • Advanced and adaptive PID control loop for simultaneous control of roll, pitch, and yaw axes.
  • Compatible with 1520 µs Analog, 1520 µs Digital, 760 µs Digital, and UR mode servos.
  • Rudder (Yaw) Section: Capable of sensing angular velocity up to +/- 1,000 deg/sec. Features Feed Forward Option for more accurate corrections.
  • Aileron, Elevator (Roll, Pitch) Section: Developed for flybarless helicopters, supports H3-120, H3-140, H3-90, H4-00, and H4-45 swash plate types.
• Governor Section:
  • Advanced and adaptive PID control loop for consistent and accurate operation.
  • Governs head speeds from 700 rpm to 4,000 rpm.
  • Compatible with 1520 µs Analog and 1520 µs Digital throttle servos.
  • Features Feed Forward Option for precise head speed governing.
  • Selectable Governor or Revolution Limiter modes.
  • Supports gear ratios from 1.00 to 50.00.
  • Compatible with GV-1 revolution sensor and optional back plate or brushless phase sensors.
• Receiver Section:
  • Supports FASSTest-2.4 GHz (18/12CH mode) and T-FHSS-2.4 GHz systems via the GPB-1.
  • S.BUS2 compatibility allows transmission of battery voltage and optional sensor information.
  • Diversity antenna system and DUAL RX system for enhanced reliability.
• Other Functions: Maximum RPM memory, cumulative engine operation timer, and integration of engine operation time.
• Applicable Systems: Transmitters: Futaba FASSTest-2.4 GHz (18/12CH mode), T-FHSS Air-2.4 GHz. (Wireless tuning is only supported by FASSTest).

Connection Diagram Description

The connection diagram illustrates how to connect various components to the CGY770R and GPB-1. The main connections are:

• Servos: Aileron, Elevator, Collective Pitch, Rudder, and Throttle/ESC servos connect to designated ports on the CGY770R.
• Battery: A power source (3.5-8.4V) connects to the BATT port or the 2nd Rx2 port in Dual Rx mode.
• RPM Sensor: Connects to the RPM sensor port for governor function.
• GPB-1 Gyro Program Box: Connects to the CGY770R via the CGY connection cable for setup.
• Transmitter: Connects to the GPB-1 via the transmitter connection cable for wireless tuning.
• Optional Components: External receivers or S.BUS2 sensors can be connected to specific ports.

Diagram Text Descriptions:

• Aileron servo
• Elevator servo
• Collective Pitch servo
• Rudder servo
• Battery (3.5~8.4V) or 2nd Rx2 at Dual Rx
• ESC or Throttle servo
• 2nd Elevator servo (H4-xx) (CH setting is possible for cases other than H4-xx)
• External Rx when built-in Rx is INH or S.BUS2 sensors
• 3.5~8.4V (or AUX.CH servo)

GPB-1 Gyro Program Box Description

The GPB-1 Gyro Program Box is an essential tool for configuring the CGY770R. It allows users to adjust gyro sensitivity, governor settings, and other parameters. It connects to the CGY770R via a dedicated cable and can also connect to a transmitter for wireless parameter transfer.

Specifications

*The operating voltage shown only applies to the CGY770R and GPB-1. Always verify that your receiver, servos, tail rotor servo, switch, and any other electronic components used in your installation are capable of operating at the voltage you plan to use.

Warranty & Repair Service (In U.S.A.)

If you encounter difficulties setting up or operating your gyro, consult the instruction manual first. For further assistance, contact your hobby dealer or the Futaba Service Center via email (service@futabaUSA.com), fax (1-256-461-1059), or phone (1-256-461-9399).

If the issue cannot be resolved, pack the system in its original container with a note detailing the difficulty, including:

• Symptoms (including when the problem occurred)
• System details (Transmitter, Receiver, Servos and model numbers)
• Model name
• Your Name, Address, and Telephone number

Send the package to the authorized Futaba Service Center:

Futaba Corporation of America
2681 Wall Triana Hwy
Huntsville, AL 35824, U.S.A.

Compliance Information

Compliance Information Statement (for U.S.A.)

This device, trade name Futaba Corporation, model number CGY770R, complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. CAUTION: Any changes or modifications not expressly approved by the grantee of this device could void the user's authority to operate the equipment. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and your body. The responsible party for this device compliance is: Futaba Service Center, 2681 Wall Triana Hwy, Huntsville, AL 35824, U.S.A., TEL 1-256-461-9399 or E-mail: service@futabaUSA.com.

Compliance Information Statement (for Canada)

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and your body.

French: Cet appareil radio est conforme au CNR-210 d'Industrie Canada. L'utilisation de ce dispositif est autorisée seulement aux deux conditions suivantes : (1) il ne doit pas produire de brouillage, et (2) l'utilisateur du dispositif doit être prêt à accepter tout brouillage radioélectrique reçu, même si ce brouillage est susceptible de compromettre le fonctionnement du dispositif. Cet équipement est conforme aux limites d'exposition aux rayonnements IC établies pour un environnement non contrôlé. Cet équipement doit être installé et utilisé avec un minimum de 20 cm de distance entre la source de rayonnement et votre corps.

Declaration of Conformity (for EU)

Hereby, Futaba Corporation declares that the radio equipment type CGY770R is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: http://www.rc.futaba.co.jp/english/dl/declarations.html

Precautions

Meaning of Special Markings

Pay special attention to safety where indicated by the following marks:

• DANGER: Procedures which may lead to dangerous conditions and cause death/serious injury if not carried out properly.
• WARNING: Procedures which may lead to a dangerous condition or cause death or serious injury to the user if not carried out properly, or procedures where the probability of superficial injury or physical damage is high.
• CAUTION: Procedures where the possibility of serious injury to the user is small, but there is a danger of injury, or physical damage, if not carried out properly.
• [Prohibited]: Prohibited actions.
• [Mandatory]: Mandatory actions.

WARNING
Failure to follow these safety precautions may result in severe injury to yourself and others.

• Read through the entire manual before operating this product.

Usage Precaution

• The FASSTest system is not compatible with the conventional FASST system.

CAUTION

• Do not mount the GPB-1 (Gyro Program Box) on the helicopter. It will be damaged by vibration.

Antenna Installation Precaution

• WARNING
  Be sure that the two antennas are placed at 90 degrees to each other. The CGY770R has two antennas. To maximize signal reception and promote safe modeling, Futaba has adopted a diversity antenna system. This allows the receiver to obtain RF signals on both antennas and fly problem-free.
• Do not cut or bundle the receiver antenna wire.
• Do not bend the coaxial cable, as it causes damage.
• To prevent damage to the antenna, exercise caution. Do not bend at the base of the antenna. Also, ensure that the unit is not subjected to impact damage.
• Keep the antenna as far away from the motor, ESC, and other noise sources as you possibly can.

Carbon Fuselage Precaution

• WARNING
  You must leave 30 mm at the tip of the antenna fully exposed. The exposed antenna should be secured so that it cannot move around or back inside your aircraft.

Connector Insertion Precaution

• DANGER
• WARNING
  Do not connect the connector by mistake as shown on the right. Do not connect either a switch or battery in this manner.

Before Each Flight

• WARNING
  Keep away from conductive materials to avoid short circuits.
• If it does not operate properly during operation test before use or use, stop using it.
• Always check the transmitter and receiver battery voltage to ensure they have enough remaining capacity to complete the flight.
• Confirm that the CGY770R is operating in the correct mode.

About Batteries

• WARNING
  Newer high-end servos and other radio equipment can place large demands on power systems. When using a regulator, ensure it can supply the current demands of your equipment. Also, ensure the wiring and switch selected can handle high current draws. The servo current draw can be up to 50% higher on a flybarless helicopter. Always ensure your receiver battery is fully charged before each flight.

About Connector

• Insert connectors such as sensor, servo, connection cable, battery, etc., securely. If not fully inserted, they may come off due to vibration during flight, posing a danger of detachment.

About Wiring

• Please secure the wiring so that it does not rub against the helicopter frame or other items that could cause wear. If it does, consider covering these areas with fuel tubing (or similar) to prevent damage.

About Vibration Isolation and Waterproofing

• The CGY770R is fixed with a dedicated mounting pad for good condition, and the helicopter should have sufficient anti-vibration measures to avoid strong vibration during flight. If there is a risk of the gyro getting wet, place it in a plastic bag for waterproof measures.

On Flight Precaution

• Always exit programming mode before attempting to fly the model.
• Gyro Operating Precautions:
  • The CGY770R requires 5-10 seconds to initialize when power is turned on. Do not move the helicopter or the tail rotor, aileron, and elevator sticks during initialization, or the gyro may not initialize properly. Once initialization is complete, the swash servos and tail servo will move several times, indicating the CGY770R is ready for flight.
  • Verify that the gyros are operating and compensating in the correct direction before each flight. Incorrect compensation direction on any axis can make the model uncontrollable after takeoff.
  • The servo type parameters within the CGY770R must match the servo type being used. Incorrect settings may damage the CGY770R or servos, possibly resulting in a loss of control during flight.
  • Always allow the gyro to adjust to the surrounding environmental temperature before flight. Large temperature changes during use can cause drift and other operational issues.
  • If switching between Normal Mode and AVCS Mode in flight, you must have the gyro re-learn the center position after making a trim change on the transmitter. To memorize the new center position, flip the gain switch on the transmitter three times between Normal Mode and AVCS Mode (Normal → AVCS → Normal → AVCS) within one second. The servo will center, indicating the new center position has been memorized.
  • When operating the gyro in AVCS Mode, all compensation and revolution mixing must be disabled, and any tail rotor or swash offsets for flight modes must be disabled.
  • Do not drop the CGY770R onto a hard surface or subject it to strong shock, as this may damage the sensor.
  • Verify that the gyro is operating in the desired mode.
  • When the CGY770R is operated in AVCS mode, the tail rotor or swash plate servos will not center when the tail rotor, aileron, or rudder stick is released. This is normal for AVCS mode. Servos may also move while the model is being carried to the flight line. Before takeoff, visually center the tail rotor pitch slider and level the swash plate using the transmitter control sticks. You can also center the servos by moving the tail rotor stick full left, then full right, back to full left, and then allowing the stick to center within one second; the same method applies for aileron and elevator servos.
• WARNING
  Never turn off the CGY770R while the GX (gyro) LED is blinking green at high speed (approx. 5/sec). If the power is turned off during high-speed blinking, a data error will occur, and all data will be initialized. It is very dangerous to fly in this state.

Governor Operating Precautions

• Governor:
  • When the throttle servo is connected to the CGY770R, the battery fail-safe function within the CGY770R must be set up and enabled.
  • Throttle Fail Safe Function (Transmitter Setting): Use the fail safe function for the channel that turns the governor on and off to set the fail safe position to the point at which the governor is turned off. With this setting, when the system enters fail safe, the governor will be turned off, and the receiver throttle signal (fail safe position preset) will be output directly.
  • When using the condition hold function on the transmitter, always set the throttle servo maximum operating point to less than the point at which the governor is activated. If this is not done, the governor may activate while in condition hold.
  • While preparing for flight or starting the engine, always ensure the throttle remains below the governor activation point and do not select any flight modes that may activate the governor.
  • If you prefer to activate the governor while the model is still on the ground, always ensure that you have at least -1 degrees of pitch in the model before activating the governor. This negative pitch is necessary to prevent an unexpected lift-off as the governor activates and the head speed increases to the desired RPM.
  • Be sure to set the autorotation condition to the OFF side with the governor ON/OFF switch function.
  • Periodically check the RPM sensor output to ensure proper governor operation. Due to high vibration and centrifugal forces, the magnet may come loose or the sensor alignment may change. Every 10th flight, verify that the magnet and sensor are properly mounted.
  • If abnormality such as vibration is recognized on the aircraft side during operation, be prepared to turn off the governor immediately.

Machine Maintenance

• WARNING
  Even though the CGY770R is a high-performance gyro and governor, it is necessary to ensure that the helicopter mechanics are also in optimum operating condition. Please use the guidelines below and address all issues before installing and flying the CGY.
• The CGY must be used with a rigid tail rotor drive system. Any modern torque tube or belt drive system should be adequate. Do not attempt to fly the CGY using a wire-driven tail rotor system.
• Always ensure the drive gears, torque tube, pulleys, belt, bearings, and shafts are in proper working condition. If any of these items are damaged or worn, they must be replaced.
• The linkage rod, tail rotor bell crank, pitch slider, and tail rotor grips must operate without friction to obtain the best performance from the CGY. Binding in the tail rotor control linkage will decrease the performance of the CGY gyro and may also shorten the servo lifespan. Please take the time to ensure the tail rotor system on your helicopter is working correctly and without friction or binding.
• Vibration will affect the CGY's overall performance. All rotating components on the helicopter should be balanced to minimize vibrations in flight. Ensure that your engine or electric motor is running smoothly and that all vibrations have been addressed before installing and test flying the CGY.