1. Introduction
The GoolRC Flysky FS-i4 is an affordable and reliable 4-channel 2.4GHz radio system designed for various RC vehicles, including helicopters, gliders, and fixed-wing aircraft. This system utilizes the advanced AFHDS 2A (Automatic Frequency Hopping Digital System Second Generation) technology, ensuring strong, interference-free signal operation and stable performance.
Key Features:
- 4 Channels: Provides essential control for a variety of RC models.
- AFHDS 2A Technology: Ensures reliable, interference-free 2.4GHz signal operation with automatic frequency hopping.
- Included Receiver: Comes with a compact 6-channel mini receiver (FS-A6) suitable for most vehicles.
- Simple Binding: Features a quick and straightforward binding procedure for stable connection.
- Ergonomic Design: The transmitter is designed for comfortable handling during extended use.
- Low Power Consumption: Built with highly sensitive, low-power components to extend battery life.
3. Setup Guide
3.1. Battery Installation (Transmitter)
The FS-i4 transmitter requires 4 AA batteries for operation. Follow these steps to install them:
- Locate the battery compartment on the back of the transmitter.
- Slide the battery cover downwards to open it.
- Insert 4 AA batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Close the battery cover securely.
View of the battery compartment on the back of the transmitter, showing space for four AA batteries.
3.2. Binding Procedure
Binding is the process of linking the transmitter and receiver so they can communicate. The FS-i4 and FS-A6 offer a simple and quick binding procedure:
- Ensure the transmitter is powered off.
- Insert the binding plug into the B/VCC port on the FS-A6 receiver.
- Connect power to the receiver (e.g., from an ESC or separate battery). The receiver's LED should flash rapidly.
- While holding down the 'BIND RANGE TEST' button on the transmitter, power on the transmitter.
- The receiver's LED should become solid, indicating successful binding.
- Release the 'BIND RANGE TEST' button and power off both the transmitter and receiver.
- Remove the binding plug from the receiver.
- Power on the transmitter first, then the receiver. The receiver's LED should be solid, confirming the connection.
3.3. Connecting Receiver and Servos
The FS-A6 receiver has 6 channels for connecting servos and other components. Refer to the diagram below for typical connections:
Diagram illustrating how to connect the FS-A6 receiver to a battery, switch, and various servos (Rudder, Throttle, Elevators, Ailerons).
- Connect the battery/ESC to the B/VCC port (after binding).
- Connect servos to channels CH1-CH6 according to your model's requirements (e.g., CH1 for Aileron, CH2 for Elevator, CH3 for Throttle, CH4 for Rudder).
4. Operating Instructions
4.1. Transmitter Overview
Familiarize yourself with the various controls and indicators on the FS-i4 transmitter:
Detailed diagram showing the antenna, handle, left and right gimbals, trim switches, reverse switches, bind key, power switch, PS/2 port, and battery compartment.
- Gimbals (Sticks): Control primary flight surfaces (e.g., Aileron, Elevator, Throttle, Rudder).
- Trim Switches: Used for fine-tuning the neutral position of control surfaces.
- Reverse Switches: Reverse the direction of servo movement for specific channels (V-MIX, RUD, THR, ELE, AIL).
- Power Switch: Turns the transmitter on/off.
- BIND KEY: Used for the binding procedure.
- PS/2 Port: For simulator connection.
Close-up view of the left gimbal, used for controlling throttle and rudder on Mode 2 transmitters.
Close-up view of the right gimbal, used for controlling aileron and elevator on Mode 2 transmitters.
Close-up view of the servo reverser switches, allowing adjustment of servo direction for V-MIX, RUD, THR, ELE, and AIL channels.
4.2. AFHDS 2A Digital Proportional Radio Control System
The FS-i4 utilizes Flysky's proprietary AFHDS 2A technology, which stands for Automatic Frequency Hopping Digital System Second Generation. This advanced system is specifically developed for all radio control models and offers:
- Superior Protection Against Interference: By constantly hopping frequencies, it minimizes interference from other 2.4GHz devices.
- Lower Power Consumption: Efficient design helps prolong battery life.
- High Reliable Receiver Sensitivity: Ensures a strong and consistent connection between transmitter and receiver.
Visual representation of the FS-i4's digital proportional radio control system featuring AFHDS 2A technology.
4.3. Advanced Features of Flysky FS-i4 RC Transmitter
Infographic highlighting key features of the Flysky FS-i4 RC Transmitter.
- Bidirectional Communication: Capable of sending and receiving data, allowing for potential telemetry (though specific sensors may be required and are not included).
- Multi-channel Hopping Frequency: Bandwidth ranges from 2.4055GHz to 2.475GHz, divided into 140 channels. The transmitter hops between 16 channels (32 for Japanese and Korean versions) to reduce interference.
- Omni-directional Gain Antenna: High-efficiency antenna reduces interference, uses less power, and maintains a strong, reliable connection.
- Unique ID Recognition System: Each transmitter and receiver pair has its own unique ID, preventing accidental connection or interference from other systems once paired.
- Low Power Consumption: Built with highly sensitive, low power consumption components, maintaining high receiver sensitivity while consuming significantly less power than standard FM systems, extending battery life.
4.4. Product Compatibility
The GoolRC Flysky FS-i4 transmitter and FS-A6 receiver system is compatible with a wide range of RC models, including:
The FS-i4 transmitter is suitable for controlling various RC models including planes, drones, robots, cars, helicopters, and boats.
- RC Planes (Fixed-wing)
- RC Drones (Multicopters)
- RC Helicopters
- RC Cars
- RC Boats
- RC Robots
5. Maintenance
Proper maintenance will ensure the longevity and reliable performance of your FS-i4 transmitter and FS-A6 receiver:
- Cleaning: Use a soft, dry cloth to clean the exterior of the transmitter and receiver. Avoid using harsh chemicals or solvents.
- Storage: Store the unit in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- Battery Care: Remove batteries from the transmitter if it will not be used for an extended period to prevent leakage and damage.
- Handle with Care: Avoid dropping the transmitter or subjecting it to strong impacts, as this can damage internal components.
