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Testing a new model of ram-air parachute inflation

Published online by Cambridge University Press:  04 July 2016

J. Potvin
J. Potvin*
Affiliation:
Department of Science and Mathematics, Parks College of Engineering and Aviation, Saint Louis University, St Louis, Missouri, USA
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Abstract

This paper reports on the experimental validation of a new model of slider-reefed ram-air parachute opening, using jump data collected by this investigator and others. The model is based on the parachute load equation of motion coupled with a new differential equation which describes the rate of change of the parachute's drag area. The model clearly identifies the important factors which determine the inflation peak load and opening time. It also features many scaling relationships useful for design work. Several predictions are shown to be design-independent. The experimental data used in this model validation were gathered during sport parachuting jumps performed by this author. Also used are data generated by the US Navy during tests of the MC-5, MT-1X/SL and MT-1XX parachutes. The experimental results and model predictions are found to agree within 20% accuracy over a wide range of opening speeds and deployment altitudes.

Type
Research Article
Information
The Aeronautical Journal , Volume 101 , Issue 1007 , September 1997 , pp. 299 - 314
Copyright
Copyright © Royal Aeronautical Society 1997 

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