1. CO2 Dragster Project Julia Rodriguez

2. UNDERSTAND The cars are powered by the CO2 cartridge being punctured. The cars will race on a 20 meter track along a string. F=ma will be taken into account that the lightest car may go the fastest. Drag and friction will also be considered so that it does not slow down the car.

3. EXPLORE To find out what other cars looked like and to see what worked the best I viewed cars from different years from a competition on http://www.science-of- speed.com/showroomlist.asp http://www.science-of- speed.com/showroomlist.asp

4. DEFINE The CO2 car must meet TSA requirements which are pictured below.

5. IDEATE After my research I wanted to do a all shelled car with curves. I sketched several designs on a paper I then turned in. I thought the shells would make the car more aerodynamic and it would cut out wood from the bottom making it lighter.

6. IDEATE With the curves I wanted on my car I found out I could only shell the back wheels which I had to use smaller wheels for. The blueprint on the next page is my final sketch.

7. IDEATE

8. PROTOTYPE I built my car using a band saw, drill press, dremel tool, and sand paper.

9. REFINE After I originally constructed my car I need to shave off more wood from the wheels. I did this using the dremel tool. I then painted my car with lime green wall paint.

10. SOLUTION

11. VIDEO OF CAR ROTATING This video shows the final solution of my car rotating both horizontally and vertically in Inventor. https://www.youtube.com/watch?v=1jHADQ 1CDzA&feature=youtu.be https://www.youtube.com/watch?v=1jHADQ 1CDzA&feature=youtu.be

12. CAR ABOUT TO RACE

13. VIDEO OF CAR RACING This video shows the car I constructed racing in the school hallway using an electronic raceway. https://www.youtube.com/watch?v=6bW9jRb SMCI&feature=youtu.be https://www.youtube.com/watch?v=6bW9jRb SMCI&feature=youtu.be

14. DRAWING

15. RESULTS AND FLOW DESIGN A detailed race result sheet is attached to the button on my website. It shows speed, weight, wheel spin, and wheel alignment. Also attached to a button on my website is a flow design of the car and blank that shows how aerodynamic the car is.