FIELD: shipbuilding. SUBSTANCE: signals of induction emf are selected as parameters of degree of wear of propeller structural members; to this end, external local permanent magnetic field is excited in zone of diagnostics with field lines directed along plane of rotation of propeller blades; eddy currents are created in the course of rotation of propeller in members being checked; then signals of induction emf are measured and their shape and amplitude are compared with signals corresponding to serviceable state of structural members being checked to determine moments when these defects appeared and developed. EFFECT: enhanced reliability. 4 dwg
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