Video #1
Video #2
Video #3
On Friday we launched for the third time this week! It was a really interesting and very fun day in physics. We did three attempts with our fin and parachute modifications. The idea was to have a parachute made of a thin trashbag, a lightweight hemp string, an orange nose cone and an additional bottle that was cut ot hold in the parachute. Our rocket design was simple, yet we found it very effective. However, on the field we decided not to use the orange nose cone because of design problems. On the first attempt (video #1) we used 700mL of water fuel and 40psi. After launch we recorded a time of 5.3 seconds. Video #2 was the second flight there was 500 mL of water and 40psi. This was our most successful launch thus far, it was in air for 5.9 seconds. Lastly, video #3 had a water amount of 800mL and about 40psi. This was our least successful run of the day only lasting 4.2 seconds. Upon the completion of the day's launches we concluded that we are going to go back to the rocket drawing board to improve on the elements we currently have. One component we would like to improve on is the parachute. We want to have a wider chute that will catch the wind better and stay airborne longer. Today was fun and we cannot wait until the next launch day! We are already half way to the 10 second goal :D
Based on the numerical data, it appears that adding water reduces the flight time. This is probably due to the fact that it adds more mass to the bottle. Since the modifications also add mass, the bottle travels to the ground faster, which decreases the flight time.
ReplyDeletewow!!! your guys parachute works pretty well!! right now im trying to make our parachute more like yours because ours didnt really work well. good job :)
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