When flying the helicopter drone you have to keep pressing the spacebar to avoid falling. A drone should be able to be controlled with adjustable altitude. When the height is reached, the drone should hold the height independently in order to be able to control it without any problems. Raising and lowering should be separately controllable, for example with the spacebar only rise as long as it is pressed and sink only as long as the shift key is pressed. Upon contact with the ground, the drone should turn off the propellers and recognize the situation as having landed.