Hello, and welcome to Josh and Britney's Balloon Car Project Wiki. Our car was called The Girlscout. It's average speed was 1.36 meters per second. Compared to the rest of the class, our car performed above average. Here is how our car worked:
The body of our car was made out of a Thinmints box and was about 30 centimeters long and about 5 centimeters wide. Our car had 4 wheels made out of CD's and juice bottle caps attached by hot glue. The rest of our design was pretty simple. We had one axle in the back and one it the front of the car. The wheels on our car were attached to the axle. Our car was powered by two balloons; one inside of the other. We attached the balloons to a metal Slurpee straw to funnel the air. The straw was about a centimeter wide. We attached the balloons to the straw using a rubber band. One thing that was unique about are car was that we pulled our balloons all the way over the straw so that the air could funnel out easier and make our car go faster. We used a cork to hold our straw up and angle it towards the ground. The fact that we angled our straw towards the ground also made our car unique because not many other kids did that, even though it seemed to make our car go faster.
Once the air was let out of the balloon, it was funneled towards the ground using the straw. This propelled our car forward. However, since we had a medium sized straw, the air came out fast, but not so fast that it all got used up in the beginning of our run. This means that the straw held enough air to dirve our car all of the way through the finish line. Our wheels were free spinning and began to spun by the force of the air pushing the car forward. Also, since our body was hollow, it caught the balloons after they deflated. This prevented the balloons from getting caught in our wheels, which would have slowed our car down.Overall, our design seemed to work well and our car performed above average compared to the rest of the class.
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