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for a semi ellipsoidal parachute with over 340 cm diameter how many gores do you recommend?

What do you think packing a parachute in a reserved space of 30 cm lenght? The rocket diameter is 13cm. My chute is nylon ripstop and have about 370cm diameter. how can I find a correct space/volume necessary to packing It? Have any formula?

Hi, I'm from Brazil. I'm a college student, and my university have plans to compete in 2021 university nationals rocket design league, i'm a member of the recovery system. We all are begginers. I know the rocket will have about 13kg and 2,4m. I calculated de parachute area (semi elipsoidal) and...

What the best test to analyse for exemple a parachute stability for a rocket of 13 kg? Maybe drop from very high place? Wind Tunnel? Please, I need suggestions and how to do it properly. Thanks!!!

the lots of articles i read, the Cd was between 0.7~0.8, but I saw a Nasa Video on youtube saying 1.5, and my teacher said in mec fluid book says 1.4, know i'm feeling lost... the material of the parachute will be Nylon Ripstop... I will have to calculate that coefficient of drag or have some...

How to calculate the size of the spin hole?

How to make a properly Wind Tunnel Test for a 13kg Rocket?

What the purpose of the wind tunnel test for my parachute? Is that really necessary? If is, how can I do that properly? Pls, I need Help with a certain Urgency. :)