Calibration Loading of a Strain-Gauged Diverless Helicopter Weapon Recovery System.

Abstract

This memorandum from Australia presents the results of a ground calibration loading test carried out on the Diverless Helicopter Weapon Recovery System (DHWRS). The DHWRS is essentially an aluminum alloy (6061-T6) cage, suspended by a cable from a helicopter, that is used to recover Mk48 torpedoes from the sea. It had been found that some DHWRS used in service had developed cracks at the welds in the aft ring. It was decided that the structural integrity of the DHWRS should be verified. This was done by a calibration loading test to determine the strains for typical loading conditions, and for a load of 24050N, which corresponds to the US Navy static proof load for the acceptance of the DHWRS. A regression analysis was carried out on the load/strain data. Equations relating applied load to measured strain are presented for several locations, including the critical position on the aft ring. Stress levels for a load of 24050N were calculated from the load/strain data. Keywords include: Recovery vehicles, and Underwater equipment.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1984
Accession Number
ADA151486

Entities

People

  • M. Heller

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircraft Maintenance
  • Aircrafts
  • Aluminum
  • Aluminum Alloys
  • Bending Moments
  • Bending Stress
  • Calibration
  • Department Of Defense
  • Gages
  • Helicopters
  • Load Cells
  • Machines
  • Regression Analysis
  • Safety Factor
  • Strain Gages
  • Test Methods
  • Underwater Equipment

Readers

  • Aerospace Test and Evaluation
  • Electrical Engineering
  • Thermal Physics or Thermal Science.