GoolRC WLtoys F959S RC Airplane Instruction Manual

1. Introduction

The GoolRC WLtoys F959S Sky-King is a 3-channel remote control glider designed for both beginners and experienced enthusiasts. It features a durable EPO construction, a 6-axis gyroscope for stable flight, and a folding propeller for reduced resistance during gliding. This manual provides essential information for assembly, operation, maintenance, and troubleshooting to ensure a successful and enjoyable flying experience.

Image 1.1: The GoolRC WLtoys F959S RC Airplane and its accompanying remote control.

Key Features:

• Three-channel backward pusher glider: Designed for efficient flight and easy control.
• EPO Construction: Ensures strong impact resistance and durability.
• Built-in 6-axis gyro: Provides enhanced flight stability and smoothness, suitable for beginners.
• High discharge rate battery: Offers approximately 15 minutes of flying time and over 20 minutes of gliding time.
• Folding propeller: Reduces drag when gliding, improving efficiency.
• Lightweight Streamline Fuselage: Weighing only about 100g, contributing to stable flying performance.

Image 1.2: Overview of key features including USB fast charging, 2.4GHz transmitter, and battery specifications.

Image 1.3: Illustration of the integrated 6-axis gyroscope, which enhances flight stability.

Image 1.4: The ultralight, streamline body design, weighing approximately 100g, contributes to stable flight.

2. Package Contents

Before beginning assembly, please verify that all components listed below are present in your package:

• WLtoys F959S body
• Left wing
• Right wing
• Wing spar
• 7.4V 300mAh LiPo battery
• X4 transmitter (mode 2, left hand throttle)
• USB charger
• English user manual

Image 2.1: All items included in the product package.

3. Setup and Assembly

3.1 Wing and Nose Assembly

The F959S features a detachable fixed-wing design and a detachable nose for easy assembly and transport. Carefully attach the left and right wings to the main body, ensuring they are securely in place. The nose cone can also be attached or detached as needed.

Image 3.1: The detachable fixed-wing and nose components. Ensure the center of gravity is correctly positioned for optimal flight.

3.2 Battery Installation and Charging

1. Aircraft Battery: Insert the provided 7.4V 300mAh LiPo battery into the designated compartment within the aircraft body. Ensure the connectors are properly aligned and secured.
2. Charging: Connect the LiPo battery to the USB charger. Plug the USB charger into a compatible USB power source (e.g., computer USB port, USB wall adapter). The charging time is approximately 30-40 minutes. Do not overcharge the battery.
3. Transmitter Battery: Open the battery compartment on the back of the X4 transmitter. Insert 4 x 1.5V AA batteries (not included), observing the correct polarity. Close the compartment securely.

4. Operating Instructions

4.1 Pre-Flight Check

• Ensure both the aircraft battery and transmitter batteries are fully charged.
• Verify all parts are securely assembled (wings, nose).
• Check that the propeller is free from obstructions and can fold correctly.
• Perform a range check to ensure the 2.4G signal is strong (control distance up to 200 meters).

4.2 Take-Off Method

For optimal take-off, hold the aircraft firmly and throw it with a gentle, flat, level motion. Avoid throwing it with the nose pointing too far up or down, as this can lead to an unstable initial flight path.

Image 4.1: Proper take-off technique involves a correctly flat level throw. Avoid mistakenly nose-up or nose-down throws.

4.3 Flight Controls and Characteristics

The F959S is a 3-channel aircraft, providing control over throttle, rudder, and elevator. The built-in 6-axis gyro assists in maintaining stable and smooth flight, making it forgiving for new pilots.

• Throttle: Controls the motor speed and altitude.
• Rudder: Controls the yaw (left/right turning) of the aircraft.
• Elevator: Controls the pitch (nose up/down) of the aircraft.

Utilize the rudder channel to execute slides and spirals. You can turn off the motor during flight to allow the aircraft to glide freely, extending flight time and practicing gliding maneuvers.

Image 4.2: The rudder allows for slide and spiral control. The system operates on a 2.4GHz frequency with a range exceeding 200 meters.

Image 4.3: The folding propeller mechanism and how the rudder can be used to control slides and spirals by turning off the motor.

5. Maintenance

5.1 General Care

• Cleaning: After each flight, gently wipe down the aircraft body with a soft, dry cloth to remove any dirt or debris. Avoid using harsh chemicals or solvents.
• Inspection: Regularly inspect the wings, fuselage, propeller, and control surfaces for any signs of damage, cracks, or loose connections. Address any issues before the next flight.
• Propeller: Ensure the folding propeller mechanism operates smoothly and is free from obstructions.

5.2 Battery Care and Storage

• Storage: Store the LiPo battery in a cool, dry place away from direct sunlight and extreme temperatures. For long-term storage, it is recommended to store LiPo batteries at a storage charge (around 3.8V per cell), not fully charged or fully discharged.
• Charging Safety: Always charge batteries on a non-flammable surface and never leave charging batteries unattended.
• Disposal: Dispose of damaged or old LiPo batteries responsibly according to local regulations.

5.3 Storage of Aircraft

When not in use, store the aircraft in its original packaging or a protective case to prevent damage. Detaching the wings and nose can help save space and protect components during storage.

6. Troubleshooting

This section addresses common issues you might encounter with your GoolRC WLtoys F959S RC Airplane.

7. Specifications

Detailed technical specifications for the GoolRC WLtoys F959S RC Airplane:

8. Warranty Information

GoolRC products are manufactured to high quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official GoolRC website. Typically, warranty covers manufacturing defects for a limited period from the date of purchase. Please retain your proof of purchase for any warranty claims.

9. Customer Support

If you encounter any issues not covered in this manual, or require further assistance, please contact GoolRC customer support. You can typically find contact information (email, phone, or support portal) on the official GoolRC website or through the retailer where you purchased the product. When contacting support, please provide your product model number (F959S) and a detailed description of the issue.