NASA developed the Mars helicopter drone
Despite being an achievement in Mars exploration, even Curiosity will be limited to the Red Planet's vision and mobility on the terrain.Russia tests unmanned aerial cum-shot helicopter
According to the manufacturer Rostec, the helicopter was designed with a coaxial rotor blades, with a planned launch weight of 500kg.China launches unmanned helicopters can stealth
The AV500W has a length of 7.2m, a maximum takeoff weight of 450kg with a top speed of 170km / h and a range of 4,000m.