AIR FLOW CHARACTERISTICS OF PARACHUTE FABRICS AT SIMULATED HIGH ALTITUDES

Abstract

The air flow characteristics of parachute canopy cloth were measured over an unusually wide range of test conditions. High altitude simulated tests (up to 150,000 feet) have shown the cloth to have markedly low flow rates, as may be predicted from a nozzle flow analogy. A method of predicting high altitude behavior was proposed. Permeabilities of four cloths were shown to be significantly dependent on their state of stress AT THE TIME OF AIR FLOW MEASUREMENT. The magnitude of this relationship was observed to be determined by the biaxial stress-strain behavior of each fabric. The air stream deflection tendency of thick canopy material was verified and its cause investigated. The role of pore geometry in influencing cloth permeability was explored.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1960
Accession Number
AD0270928

Entities

People

  • C. V. Seshadri
  • G. A. Brown

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Flow
  • Air Force
  • Barometric Pressure
  • Construction
  • Flow Rate
  • Fluid Dynamics
  • Fluid Mechanics
  • Geometry
  • High Altitude
  • Hydrodynamics
  • Materials
  • Materials Laboratories
  • Measurement
  • Mechanics
  • Plastic Explosives
  • Pressure Measurement
  • Recording Systems

Readers

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