Drones are used all over the world for racing and freestyle events. Racing and freestyle drones are built for speed and agility. Racing and freestyle drones tend to be relatively small in size, with 250 mm between the propeller shafts and 5-6 inch props being the usually upper end of the size scale.
Drones With Cameras
Drones have also been used in various art projects including but not limited to drone photography. At least one drone has demonstrated the feasibility of painting graffiti on a wall with spray paint. They may be used in performance art with new degrees of positional control that allows for new uses of puppets, characters, lights and cameras.
Aerial Photography
Drones have also been used in light shows including most prominently in the 5 February 2017 Super Bowl LI halftime show in which Lady Gaga, in a pre-recorded segment, was accompanied by a swarm of 300 LED-equipped Intel "Shooting Star" drones forming an American flag in the sky.
Safety And Structural Inspections
Each rotor produces both a thrust and torque about its center of rotation, as well as a drag force opposite to the vehicle's direction of flight. If all rotors are spinning at the same angular velocity, the net aerodynamic torque, and hence the angular acceleration about the yaw axis, is exactly zero, which means there is no need for a tail rotor as on conventional helicopters.
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