
thumb|A DJI (company)|DJI Phantom quadcopter drone in flight thumb|Typical drone racing|racing quadcopter with carbon fiber frame and FPV camera A quadcopter, also called quadrocopter, or quadrotor is a type of helicopter or multicopter that has four rotors.
thumb|A DJI (company)|DJI Phantom quadcopter drone in flight thumb|Typical drone racing|racing quadcopter with carbon fiber frame and FPV camera A quadcopter, also called quadrocopter, or quadrotor is a type of helicopter or multicopter that has four rotors.
Although quadrotor helicopters and convertiplanes have long been flown experimentally, the configuration remained a curiosity until the arrival of the modern unmanned aerial vehicle or drone. The small size and low inertia of drones allows use of a particularly simple flight control system, which has greatly increased the practicality of the small quadrotor in this application.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).