Chosen Solution
my drone does not take off after replacing the central cross section. I think the blades are spinning the wrong direction.
Is there any software for this for pc? As my blade qx3 has, and you can fire up each motor separately and shows on the screen which way they should rotate. Top left and bottom right rotors should rotate the same. And top right bottom left should rotate the same to each other, but opposite to the other pair.
Yes, have you changed the blades? If so, make sure the blades are on correctly. What I mean is that a blades at on the a motor, while c, for counterclockwise blades are on the c motor. Search up propeller replacement on Google