Dive into the third class of an Introduction to FPV Drones series, focusing on essential components and their functionalities. Explore brushless motors in depth, including their structure, types, and operating principles. Understand the importance of electric and magnetic fields in motor operation. Learn about motor ratings, permanent magnets, and the relationship between poles and magnets. Discover the role of Electronic Speed Controllers (ESCs), their ratings, firmware, and protocols. Gain insights into battery types and ratings for FPV drones. Conclude with an overview of power distribution systems. Master the technical aspects of FPV drone components to enhance your understanding and skills in drone building and operation.