Accession Number:

ADA151486

Title:

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

Descriptive Note:

Technical memo.,

Corporate Author:

AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)

Personal Author(s):

• Heller,M.

Report Date:

1984-07-01

Pagination or Media Count:

43.0

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 loadstrain 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 loadstrain data. Keywords include Recovery vehicles, and Underwater equipment.

Descriptors:

• *LOADING(HANDLING)
• *HELICOPTERS
• *RECOVERY VEHICLES
• STRESS STRAIN RELATIONS
• TORPEDOES
• ALUMINUM ALLOYS
• STRUCTURAL PROPERTIES
• CRACKS
• STRAIN(MECHANICS)
• REGRESSION ANALYSIS
• RELIABILITY
• CALIBRATION
• AUSTRALIA
• UNDERWATER EQUIPMENT

Subject Categories:

• Helicopters

Distribution Statement:

APPROVED FOR PUBLIC RELEASE