STUDY OF PARACHUTE SCALE EFFECTS

Abstract

A study was conducted to determine the effects of changing scale upon drag coefficient, filling time, peak opening force, and stability for single, un reefed textile parachute canopies. The investigation was confined to Flat Circular, Extended Skirt, Ringslot, Ribless Guide Surface, Circular Flat Ribbon, and Conical Ribbon parachutes operating in the subsonic flow regime at altitudes below 20,000 ft. As an integral part of the study, a survey of the existing literature and test data, a compilation of all pertinent data, and recommendations for future experimental investigations were made. Scaling equations with associated 95% confidence intervals were developed for the drag coefficient of the Flat Circular and Extended Skirt parachutes through the use of a multiple regression analysis which indicates the significant variables and their functional forms. Because the available data was poorly distributed, the equations will have to be used circumspectly to avoid misleading conclusions.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1963
Accession Number
AD0296915

Entities

People

  • William B. Walcott

Tags

Communities of Interest

  • Air Platforms
  • Human Systems
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Altitude
  • Analysis Of Variance
  • Computer Programs
  • Confidence Limits
  • Data Science
  • Dynamic Pressure
  • Information Science
  • Literature Surveys
  • Parachute Canopies
  • Parachutes
  • Plastic Explosives
  • Regression Analysis
  • Statistical Analysis
  • Surveys
  • Test And Evaluation
  • Two Dimensional

Readers

  • Aerial Delivery - Logistics and Supply Chain Management.
  • Combustion and Flow Dynamics.
  • Systems Analysis and Design