Bob W.
I am currently reading an interesting book on the subject.
Check out "Parachute Recovery Systems Design Manual" by T.W. Knacke
ISBN 0-915516-85-3
It presents theory, and formulas written for those of us who are only
moderately technically astute.
It deals with exactly the information you asked about.
Even if you ultimately acquire your parachute from one of the "Trusted"
sources, you will be much
better informed on the subject.
Dan Wright
Aerodynamics are for people who can't build engines!
Enzo Ferrari
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