The drone is a lot lately in the news. When a drone is a picture emerged of a four-engined plane. It is probably for this reason that manufacturers these four or multi-engine airplanes now as quadcopter (4 engines) or hexacopter (6 engines) are also available as radio controlled models to consumers.
The quadcopter is known for its agility and the ability to perform daredevil stunts, such as creating loops. That is also the reason that flying with a quadcopter generally it takes some practice to learn them properly fly. How crazy it may sound, but the smaller the quadcopter the higher level in order to fly it well, keep in mind when purchasing a quadcopter there.