Inflated with helium, the Air_ray’s propulsion system is a flapping wing drive. Each wing has alternating pressure and tension flanks that are attached to an internal set of ribs. The flanks are ...

The drone’s wings span 2m and it weighs 480g including battery. Flying at its design speed of 5m/s, its wings are flapping at 2Hz, consuming 23W. Each wing is in two parts, hinged together, with the ...