Solve and understand the Helicopter Cube intuitively [DE]

In this tutorial I will show you how to solve the Helicopter Cube intuitively. As in my other tutorials, I will not just give you algorithms, but also derive the few algorithms that we need.
Firstly, we will restrict ourselves to the simple moves that retain the cube shape. At the end, we will also look at shape-shifting moves, how to restore the cube shape and how to solve the problems that arise with the orbits.
The Helicopter Cube is closely related to the Clover Cube, for which I have already made a separate video ( • Intuitive Lösung für d... ). Even more general is the Curvy Copter ( • Video ).