Most of the blogs/website say we need a minimum of four channels for a quadcopter (pitch, roll, throttle, yaw):
- One channel for throttle
- A second channel for turning right and left.
- A third channel for pitching forward and backward.
- A fourth one for rolling left and right.
But looking at the RC transmitter, I see that at a time you can change a maximum of two sets data (left and right joy stick). Even if you want to send Rudder and Throttle information at the same, can it not be sent in the same packet?
My understanding is two channels should be sufficient to control a quad copter. Please provide more clarity on this.