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Old 01-05-2006, 02:45 PM
SLC1993 SLC1993 is offline
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Default Parachute Science Fair Project - 7th Grade

I'm working on a science fair project for the descent of parachutes. I was thinking of making 3 different parachutes (nylon, cotton, polyester). I don't know what my dimensions should be of the parachute itself, and the fishing line I'm going to use. Also, what should I use as a weight for the parachute according to the dimensions?

Thank you!
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Old 01-08-2006, 03:58 PM
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Default weight

for the weight i have an idea ( i did it in science class b4). Use a ball of clay and put it on the end of the strings. make sure that the strings r tied 2gether. for the dimensions may i suggest making into octagon shapes. i think that they're the ones with 8 sides, im not sure (im not good at geometry). like poke holes lol.
Hope it helps!
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Old 06-11-2006, 10:41 AM
icstars icstars is offline
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I also have an idea for the weights. You could take small plastic bags and fill them with sand. This way you can get the exact weight that you want. And then you just tie the bag to the strings.
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Old 06-22-2006, 09:12 AM
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Icstars has the right idea, spot on. You want to control the payload weight very precisely. The size needed for the actual chute is determined by the weight of the payload, and the material used. Some materials weigh more than others, some materials resist air more than others. Generally speaking, you can't really make a parachute that is too big. So, start out large and work your way down in size if there is a size or weight requirement for the WHOLE thing. Just so you know, if you make your parachute TOO big, the resistance of the air on the chute can actually CARRY AWAY the payload at the slightest breeze. Should this happen during the experimenting phase, simply add more sand to the payload.

Heisenberg may have slept here.
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