Description: In the article the analysis of aerodynamic features of work of bearing screw of helicopter is conducted at flight on heights, close to the maximal practical ceiling, it is rotined that at flight of helicopter on heights, close to the height of the maximal practical ceiling, for providing of effective work of bearing screw and maintainance of climb rate it is necessary to diminish the general step of bearing screw.

Keywords: aerodynamic features of bearing screw, maxheights