TETHERED – MULTI ROTOR 2018-12-06T09:53:06+00:00


Tethered Unmanned Aerial Vehicles (UAV) are ideally suited for applications that require more endurance built to withstand harsh environments. Also, high band width communication is possible because of optical fiber tether.

The proposed Tethered UAV based surveillance System is a solution for Border Security Force (BSF) applications by enhancing Electro optic (EO) surveillance capabilities thereby providing enhanced situational awareness and dynamic command and control functions.

With the displacement of the EO payload at an approximate height of 60 meters, the operational capabilities of the EO sensor are enhanced.


To develop a UAV tethered to a ground and to carry a surveillance payload (Daylight/Thermal) continuous video streaming in real time to ground.

The tethered UAV should be capable of handling camera payload with endurance of 6 hours at a maximum of 100m height. Maximum weight of UAV is 9 kg excluding tethered wires and weight of onboard battery.


Tethered unmanned aerial vehicle with sensor payload for surveillance purpose during day and night.
UAV is tethered to a ground station on predefined area that provides power source. UAV communicates with ground control
station UAV capable of operating in windy conditions of 20 km.hr during all phases of operation.

Tethered Uav Eo Surveillance System Description

  • Unmanned Aerial Vehicle (UAV)

  • Tether winch unit

  • Ground Control Station

Unmanned Aerial Vehicle (UAV) comprises of airframe, Propellers, motors, electronic speed controller, autopilot, sensors, payload, power module and backup battery. It is connected to a spooled, hybrid opto-electronic power/control tether from tether winch unit. Tether winch unit is used for winding and unwinding the tether during takeoff and landing of the UAV. Ground Control station comprises of communication antennas, rugged laptop and remote video terminal. The
system is capable of carrying a payload while hovering using ground power. The mounted payload’s high definition signals are sent back to the ground control unit via an optical-fiber cable within the tether. The system has two distinctive advantages over a normal UAV: high endurance and large bandwidth. The system can be operated stand-alone or vehicle-mounted and it is suitable for aerial video surveillance.