parachute concavity and drag

[matbrown 0]

I am looking for help understanding parachute concavity and drag for a research project. Can anyone suggest any references for the effect of parachute concavity on overall drag of a chute. The experiments we have done suggest the greater the concavity the more drag but it is tough to understand this completely. Any help would be hugely helpful.

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[riggerrob 558]

Go read Theo Knacke's (sp?) textbook on aerodynamic decellerators, available from Poynter Publishing.

[Gary73 8]

Quote

Go read Theo Knacke's (sp?) textbook on aerodynamic decellerators, available from Poynter Publishing.

Parachute Recovery Systems Design Manual
by T.W.Knacke

Excellent book, with lots of drawings, charts, photos, and math. Available from Para-Gear.

"Extraordinary claims require extraordinary evidence." - Carl Sagan

[erdnarob 1]

Contact Jean Potvin and Gary Peek (Peek on this forum) from University of St-Louis Mo. They are specialized in low speed aerodynamics concerning parachutes. A person who could help you too is John Sherman of Jump Shack.

Learn from others mistakes, you will never live long enough to make them all.

[councilman24 36]

Another, earlier reference with more math than I care to not understand is
"Parachutes" by W.D. Brown, published by Sir Isaac Pitman & Sons, LTD, London in 1951.

But you may not find this one.

I'm old for my age.
Terry Urban
D-8631
FAA DPRE