A little bit of theory: How do Quadcopters fly?

How do Quadcopters fly?

 

Quadcopeters as the name suggests use four motors to fly. Two motors rotates in clockwise direction and another two in counterclockwise direction. In this way their are balancing quadcopters rotation. When four clockwise motors would be used on the copter, it will start rotating always in clockwise direction and if only four counterclockwise motors copter would be rotating in counterclockwise direction. Having two pairs of contrary motors cause Quadcopters to stay in place. Peacefully hovering above ground. When speed on all motors equally increases or decreases drone will vertically take-off from the ground or

Good to know: lift, drag and thrust.

Piloting

 

Quadcopter or any other copter, airplane or object can be rotated around three axis, they are called roll, pitch and yaw.

  • Rotation around the front-to-back axis is called roll.
  • Rotation around the side-to-side axis is called pitch.
  • Rotation around the vertical axis is called yaw.

Airplanes use ailerons, rudder and elevator to rotate around one or another axis. However copters doesn’t have them instead use four motors with propellers. Airplanes are more intuitive to understand but quadcopters are not as complex as they look.

 

Roll, Pitch & Yaw

Always to rotate drone through one or another axis two motors on one side need to speed up and other two motors on opposite side must be inversely changed.

Roll axis

 

To lean drone to right both left motors speed need to be increased and speed of both right motors decreased. To lean to left both right motors speed should be increased and left decreased.

Pitch axis

 

 

Rotating a drone thought pitch axis requires speed change of back and front motors. To lean forward speed of ‘front’ motors need to be decreased and speed of ‘back’ should be increased. To lean backward speed of ‘front’ need to be increased and ‘back’ should be decreased.

Yaw axis

 

 

Yaw axis full move explanation is a little bit more complex then other two axis. I would like to explain the basics here but if you would like to know more, just google it. Also good thing is that all flight controllers have this knowledge injected to their ‘brain’. In the nutshell, to turn drone left or right two diagonally across motors must speed up and second two should slow down.

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