Following is a transcript of the video. This helicopter has dual-crossing rotors for increased precision The K-MAX uses a unique double rotor system where the two rotors cross each other.

Enter Airbus Helicopters, a French company that aims ... to fuel efficiency as it bears roughly 40% lift load off the main rotor during take-off. "By adjusting the distribution of power between ...

combined with its double rotor mechanism, provides high maneuverability. As a result, the Ka-52 represents a challenging target to neutralize. Moreover, the helicopter, known as the "fire chariot ...

just like the tail rotor of a real helicopter. The result is a quadcopter that can fly upside-down with the greatest of ease, perform barrel rolls, and all the other maneuver a true 3D RC ...