On today's launch, we used an unmodified and modified rocket. Our first video shows the unmodified rocket which did not launch at first. We pumped the bottle 6 times total for this launch. The total time in air was about 3 seconds. The second video shows our modified rocket launch. We attached 3 makeshift fins with duct tape. We pumped the bottle 12 times total for this launch. Our total air time on the modified launch was 4 seconds. This shows the fins could have improved our time or we had better wind conditions. It also shows that more pumps could have improved the time. For both launches we added 500 milliliters of water.
Aside from only increasing pressure on the bottle, adding more water would increase its force, causing it to launch farther into the air.
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