EXPERIMENTAL DETERMINATION OF THE APPARENT MOMENT OF INERTIA OF PARACHUTES

Abstract

An experimental arrangement for determining the apparent moment of inertia of parachute canopy models is described. The rigid canopy models are attached to a simple torsion pendulum and the periods of oscillation of the models and suspension system in air and in water are measured and used to calculate the apparent moment of inertia of the model canopies. The validity of the experimental arrangement was verified by measuring the apparent mass of some simple geometric bodies such as spheres and cubes and comparing the results with known theoretical values. Models of the circular flat, ribbon and ribless guide surface canopy shapes were tested for angular motion about two different axes and the results are presented in nondimensional coefficient form. Additional results showing the effect of geometric porosity on the apparent moment of inertia of a ribbon type parachute canopy model are presented in the appendix.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1965
Accession Number
AD0465722

Entities

People

  • Shukry K. Ibrahim

Organizations

  • University of Minnesota

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Angular Motion
  • Center Of Gravity
  • Coefficients
  • Contracts
  • Data Reduction
  • Experimental Data
  • Fluid Flow
  • Geometry
  • Government Procurement
  • Governments
  • Moment Of Inertia
  • Oscillation
  • Parachute Canopies
  • Parachutes
  • Recording Systems
  • Shape

Readers

  • Aerial Delivery - Logistics and Supply Chain Management.
  • Control Systems Engineering.
  • Mechanical Engineering/Mechanics of Materials.