The FlySpark FLS-NG3 UAV Tethered Power System is a lightweight, portable, and high-efficiency tethering solution designed for professional multi-rotor drones that require continuous, long-duration operations. Built for reliability and simplicity, it provides stable wired power, high-speed data transmission, and automatic cable control, ensuring uninterrupted aerial missions in any environment.

This advanced tethering system integrates a retractable winch, tether housing, integrated tether cables, and a ground-based power supply—delivering up to 4 kW output power with DC 380–420V output voltage. The aluminum alloy case is compact yet durable, making it perfect for field deployment, mobile missions, and industrial UAV applications.

The FLS-NG3’s intuitive control panel allows for easy operation with torque adjustment, real-time LCD power monitoring, and automatic payout/take-up for safe, smooth cable handling.

✅ Key Advantages:

1. Unlimited Flight Duration – Enables long-endurance, fixed-point, or continuous missions without battery swaps.

2. Compact & Lightweight – Weighs only 9.9 kg with a portable housing design ideal for rapid field use.

3. Smart Operation – Torque adjustment for smooth reeling, LCD display for live monitoring, and one-touch power activation.

4. Safety-Assured Performance – High-voltage protection, stable cable control, and overload prevention built in.

5. Durable Engineering – Rugged construction with protective housing ensures reliability in diverse conditions.

Ideal for aerial surveillance, event security, emergency management, infrastructure inspection, and industrial monitoring, the FlySpark FLS-NG3 redefines efficient and safe UAV tethered operations.

Technical Specifications

⚙️ Operation Summary

1. Connect the NG3 box to a 220V AC power source or generator.

2. Link the tether cable securely to the drone’s onboard power port using the XT90 connector.

3. Adjust the torque knob to the lowest setting before powering on.

4. Use the LCD display to monitor live output voltage, current, and power.

5. Maintain appropriate cable tension during flight; automatic reeling ensures smooth cable management.

6. After the mission, turn off the air switch to safely disconnect high-voltage power.

Maintenance & Safety Guidelines

• Always center the cable when hovering for extended periods.

• Avoid exceeding 60m cable deployment on 100m reels to prevent overheating.

• Inspect and clean cables and connectors every 50 takeoffs or 20 flight hours.

• Store in a dry environment (22°C–28°C) when not in use for long periods.

• Use shock-absorbent packaging during transport to protect internal components.

• Regularly maintain the lead screw with anti-rust cleaner for smooth performance.

  After obtaining the NG3 tethering box, connect it to 220V AC power. Plug the cable into the NG3 tethering box.
  Plug the cable’s three-prong plug into an outdoor power bank, generator, or new energy vehicle.
  2. Remove a section of cable and plug the plug into the drone, aligning the sockets. Hook the cable onto the drone and secure it. Turn on the drone’s remote controller to power it on.

  When the NG3 is operating, first lower the torque adjustment knob to the lowest setting, turn on the air switch, and adjust the knob to reel in the cable.

  
  2. To power the drone, press the “Display” button. The NG3 tethering box display will illuminate continuously, indicating high-voltage power output. The display will show the current output voltage, current, and power of the cable’s main power supply.
  3. When preparing for takeoff, lower the torque knob to the lowest setting or apply a slight amount of torque (in windy conditions). Pull the cable out through the drone. To reel in the cable, adjust the torque knob from low to high, synchronizing with the drone’s descent speed. Alternatively, adjust the torque to the appropriate level from the start to maintain a constant tension in the cable. The drone will then release the cable and hover, forcing the cable to pull and automatically reel in the cable during landing due to the tension.
  4. After completing the mission, turn off the air switch to disconnect the high-voltage DC power supply.

  Notes
  1) When using the NG3 tethering box, the cable must be centered when the drone is hovering for extended periods.
  2) When using the NG3 cable to power the drone for extended periods, pay attention to the cable length. For example, if the cable box has a 100M cable, a 60-meter cable is recommended to prevent the cables from becoming tangled and overheating, potentially melting the cable surface.
  Product Maintenance
  1. Storage and Transportation
  1) The NG3 tethering box must be stored in its packaging in a dry environment.
  2) If the NG3 tethered device is not in use for an extended period, or needs to be stored for more than three months, the recommended storage temperature is 22°C to 28°C.
  3) When transporting the NG3 tethered device, ensure that it is shock-absorbing. Loosening of internal screws is normal.
  2. Maintenance
  1) Inspect and maintain the tethered power supply every 50 takeoffs and landings or 20 hours of flight time to ensure proper operation. 2) After extended use, the NG3 lead screw can be properly maintained, such as by using WD4 rust remover to clean the lead screw.