Meet the Dipper: a dynamic aerial-aquatic drone that can fly and swim. It has a max cruising speed of 70 km/h and a range of 5km. Dipper can also dive from 150m at 130 km/h. It can swim for 10 minutes at a speed of 9km/h. As the researchers explain:
The vehicle has only one main propulsion motor, and uses a novel clutch system to engage either the front tractor propeller for flight in air, or the rear ship’s screw propeller for underwater propulsion.