Blade for rotating wing of helicopter is divided in three zones, with width of blade maximal in first zone, decreasing linearly in second one, and decreasing following parabolic function in third one

摘要

Blade (1) is subdivided in three zones (Z1, Z2, Z3) along its length. First zone (Z1) extends front inner edge (R0) to section situated at around 90% of its total length (R1); second zone (Z2) extends from section R1 to section situated at around 95 % of total length (R2); and third zone (Z3) extends from section R2 to free end (R) of blade. Width (L) is maximum, and slightly constant in first zone, decreases linearly in second zone, and decreases following parabolic function in third zone.