A drone that can fly and swim underwater.

The TJ-FlyingFish consists of a central domed hull and four struts, each equipped with a propulsion unit at the end. When the aircraft is in flight, all four struts point upward and the propellers rotate at the higher of the two speeds. After landing on the water, the poles turn down and rotate at a slower speed, guiding the drone underwater. After the drone finishes its stay under water, it can return to the surface and fly away. The TJ-FlyingFish weighs 1.63 kg and can soar for 6 minutes on a single battery charge or move underwater for 40 minutes. It is also capable of descending to a maximum depth of 3 m, and its maximum underwater speed is 2 m/s. The drone is completely autonomous and does not need an operator.