The four rotor drone is more commonly referred to as a quadcopter. This kind of drone is becoming increasingly popular among amateur and professional drone hobbyists alike. Quadcopters rely on four separate rotors to remain airborne and maneuver around objects and obstacles.
Compared to traditional two and three rotor drones, quadcopters are relatively easy to fly and maneuver, making them ideal for beginners. In addition, quadcopters are well-suited for a variety of uses, including photography and videography, surveillance, and racing.
Quadcopters perform best with four identical motors and propellers, ensuring that each rotor operates at an equal speed. Motors come in different sizes and types, though most quadcopters tend to use brushless motors due to their increased efficiency, power, and durability. Propellers come in various sizes, pitches, and materials.
Before purchasing a quadcopter, it's important to do some research on the motor and propeller specifications recommended by the manufacturer. Different drones require different components to achieve peak performance, so it's important to take into consideration the drone's intended purpose.
If you'd like to read more about quadcopters and the various components used to build them, you can check out this article on quadcopter parts: https://oscarliang.com/quadcopter-parts-guide/.