FIELD: gas-turbine engines. SUBSTANCE: rotating blade of turbine of gas- turbine engine has upper flange with zigzag lateral surfaces and contact flats. Thickness of upper flange in area where lateral surface is adjacent to contact flat ranges from 0.3 to 1.5 of thickness of contact flat. EFFECT: enhanced reliability of blade due to reduced stresses and avoidance of cranks and defects in upper flange of blade. 6 dwg
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