# Theory [**Lesson # 1** "Introduction. Principles of designing and building multicopters"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson1.md) [**Lesson # 2** "Fundamentals of electricity"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson2.md) [**Lesson # 3** "Theory of soldering"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson3.md) [**Lesson # 4** "Aerodynamics of the flight. Propeller"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson4.md) [**Lesson # 5** "Brushless motors and controllers"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson5.md) [**Lesson 6** "Fundamentals of electromagnetism. Types of motors"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson6.md) [**Lesson # 7** "Operating principle, types and design of batteries"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson7.md) [**Lesson # 8** "Controlling the flight of the multicopter. The flight controller operating principle. PID ESCs"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson8.md) [**Lesson # 9** "Fundamentals of radio communication. Operation principle of radio control equipment"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson9.md) [**Lesson # 10** "Analog and digital video streaming. Cameras, transmitters and receivers used"](https://github.com/CopterExpress/clever/blob/master/docs/en/lesson10.md) ## Video lessons A little about types of copters Part 1 Part 2 Part 3 Part 4 Part 5 Part 6 Autonomous flights