FIELD: aircraft engineering.
SUBSTANCE: aerodynamic profile of bearing surface cross-section features B-long chord. Profile leading edge is rounded while trailing edge is sharp or blunted. Edges are located at profile chord end and are connected by smooth lines of the profile contour top and bottom parts. Blade profile leading edge features radii of rounding in contour top Rtop of 0.012 B÷0.017 B while contour bottom Tbot - 0.006 B÷0.012 B. Maximum relative depth of profile C makes 0.149 B÷0.157 B and is located at the distance X=0.24 B÷0.45 B from leading edge and along its chord.
EFFECT: higher bearing capacity of rotor blade.
3 cl, 6 dwg, 2 tbl
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