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The Parachute Systems Design Manual (http://ftp.demec.ufpr.br/CFD/bibliografia/aerodinamica/PARACHUTE%20Recovery%20Systems%20Desgin%20Manual.pdf) indicates that the tension force on the reefing line is a very small fraction of the shock force (maximum 4%), we will use 4% of the shock force when sizing reefing lines.
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