Rocket launch 1

Today in class, we had our first launch for our rockets. The directions were to use 500 mL of water in the bottle, and about forty to fifty PSI. First we put water into our 2 L bottle and the screwed it on to the rubber cork. Once we attached the bottle and set it in place, we were ready to pump the bottle with air to add pressure. In our first launch, we used 500 mL and about 45 PSI. This launch was fairly good, but we had a problem. Water started to shoot out of our bottle before we even launched it. When we pulled the string it went pretty high in the air and was in the air for about two to three seconds. Our next launch we didnʻt listen to Mr. Blake, and used 500 mL of water and pumped about 60 PSI of pressure into the bottle. When we pulled the string to release the bottle it went a little higher. This could have been because of the pressure, but also because we screwed the cork in to the bottle tighter. During our third launch, we used the orange aqua pod that Mr. Blake had. I didnʻt see much of a difference from when we used the other device. We didnʻt get a good video of our launch because we were too caught up in watching it, so we will put a video on next time. Here is a picture of our AWESOME bottle.

Bottle Rocket Research

During the last weekend we were suppose to find information about bottle rockets and post it so other people can use it as well. In the next couple weeks we are going have to make a bottle rocket stay in the air for over ten seconds. The website I found was pretty useful. It explains how it uses all three of Newton's laws. It also tells you the most effective place the center of mass should be and where the center of pressure should be. It tells you the pressure ratio that is effective and tells what kind of fins are effective. The steps are simple enough and can help everyone. Doing this was great because it only makes it easier to help us make our bottle rockets and get better grades.