Rotor blade for helicopter, has distributed dimples provided on upper side and/or lower side of rotor blade in matrix, where dimples possess circular cross section, and are intended in area of point of rotor blade

摘要

The rotor blade (2) has distributed dimples (8) provided on an upper side (6) and/or a lower side (7) of the rotor blade in a matrix (17), where the dimples possess a circular cross section. The dimples are intended in an area of a point (4) of the rotor blade, where depth of the dimples amounts to 15 to 30 percent of thickness of the rotor blade. The dimples are arranged in straight-lined rows (18-30).