PART 1 is here
https://www.youtube.com/watch?v=K_73LydfQQY
It's a misconception that LOW KV have more torque due to their nature.
High KV motors have the same torque in low power applications such as fans, actuators etc.
What's the problem with multicopters and other RC stuff?
here we'll cover the main problem, which is related to properly feeding the motor with current.
There are at least other 3 and i'll be sure to cover them aswell, inside other topics.
