NDE (Nondestructive Evaluation) of Black Hawk Helicopter Rotary Wing-Head Spindle Threads Using Electric Current Perturbation

Abstract

Six Black Hawk helicopter rotary wing-head spindles were inspected for flaws in the thread roots using the electric current perturbation (ECP) method. Both new spindles and spindles which had been removed from service were examined. The ECP method was shown to provide much higher sensitivity for detection of surface and slightly subsurface flaws than the presently-used ultrasonic method. In addition, ECP is not influenced by the presence of a tie rod in the spindle bore. A laboratory demonstration of the flaw detection capability of ECP was held for representatives of USAAVSCOM and Sikorsky Aircraft.

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Document Details

Document Type
Technical Report
Publication Date
Nov 12, 1985
Accession Number
ADA196002

Entities

People

  • Gary L. Burkhardt

Organizations

  • Southwest Research Institute

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Aircrafts
  • Army Aviation
  • Classification
  • Contracts
  • Demonstrations
  • Detection
  • Electric Current
  • Gas Bearings
  • Helicopters
  • Inspection
  • Nondestructive Testing
  • Perturbations
  • Security
  • Sensitivity
  • Test And Evaluation
  • Ultrasonic Inspection

Readers

  • Aerospace Engineering
  • Structural Health Monitoring of Composite Structures.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).