FIELD: machine building.
SUBSTANCE: invention relates to blades of blade machines, and in particular to protective element (32) of leading blade (16) front edge, which comprises trough plate (34) and back plate (36), each of which passes along height and along length and which are connected to each other along their height, at that plate (34) of trough has more considerable length, than back plate (36) on first segment (S1) of front edge protective element, and equal to or less than length of back plate (36) on second segment (S2) of protective element (32) of leading edge.
EFFECT: reduces weight and inertia of the protective element.
10 cl, 5 dwg
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