CO2 Dragster Report MY NAME: Myles Zarzosa NAME OF SOLUTION (PROJECT): CO2 Dragster COURSE AND GRADE LEVEL: Design & Tech Part II TEACHER: Dale Brown

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Elijah Nelson
6 years ago
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1 CO2 Dragster Report MY NAME: NAME OF SOLUTION (PROJECT): COURSE AND GRADE LEVEL: TEACHER: Myles Zarzosa CO2 Dragster Design & Tech Part II Dale Brown

2 PROBLEM STATEMENT To research, design, engineer and report a CO2 powered dragster to race down a 20-meter track in the least possible time. DESIGN CRITERIA (information about my problem) 1. The dragster must have a mass of 50 grams or more. 2. The completed dragster must have a minimum/maximum length of The completed dragster must have a maximum body width at front and rear wheels of 1 ¾. 4. The dragster must have a cartridge hole depth of The dragster must have a cartridge hole diameter of ¾. 6. The height of the cartridge hole from bottom to centerline of the hole must be 1 ¼. 7. The dragster must have a minimum of 1/8 of wood around the entire cartridge hole. 8. The dragster must have two screw eyes, one toward the front and one toward the back of the centerline, on the bottom of the dragster. 9. The dragster must be made of solid wood of sufficient strength to withstand racing. 10. Bearings, bushings, and lubricants may be used in the construction. 11. The dragster must have at least three wheels with a maximum diameter of 2 inches. 12. Wheels must be made of plastic. 13. The dragster must have two axles. 14. Axles must go through the body of the dragster. External axle tubes are not permitted. 15. In the opinion of the judge(s), any dragster deemed unsafe will be disqualified. Competition: 1. Dragsters will run two at a time. 2. Dragster will run on a fishing line down a 20- meter track. 3. Race will begin when firing mechanism is fired. Both dragsters will start simultaneously. 4. Race will end when the dragster passes at the finish line. 5. Winner will be determined through single elimination. 2

3 RESEARCH (20 Fast Facts/ information I will use for my problem) e.html

4 Scanned- THUMBNAIL SKETCHES (see back of report for originals) 4

5 SOLUTION CHART & RATIONAL Solution Chart: Selecting the best design 4- meets perfectly 3- meets well 2-meets somewhat 1-meets minimally 0-does not meet Design #4 Winner Design #1 Design #2 Design #3 Design #5 WHEEL BASE WEIGHT AERODYNAMICS AESTHETICS BUILD TIME TOTAL My final design was #4 and it weigh in at: 103 grams 5

6 WINNING THUMBNAIL SKETCH 6

7 7-TECHNICAL DRAWING SHEET (Top & Side View) (see back of report for originals) W DRAWING SHEET D. PRODUCTION SHEE 7

8 CHART & RESULTS Race WINNER LOSSER 1 Rod O Meara 2 Chantel Verner 3 Dave Giardino My first CO2 drag race was against Rod O Meara s car. Both of our cars where with in 3 grams of each other with my car coming in at 103g and Rod O Meara s car at 106g. My car won the race as Rod O Meara s car malfunctioned half way down the run giving me the win. My second race was against Chantel Verner s car, again both cars were similar in weight but Chantel Verner had the lighter car and won the race. My last race was against Dave Giardino s car which was lighter than Chantel Verner s car. This race wasn t even close as Dave s car shot out fast and left my car behind rather quickly. CONCLUSION My CO2 car, finished fourth out of the five other cars racing. I had pick the design for my car to be a bit heavier then the other cars it was racing. My reason for wanting a heavier car was to survive the impact at the end of the track. My biggest fear was winning the race but not holding together on impact. So, I went with the heavier car which was my biggest mistake. I should have went with the lightest car as the race results showed that the order of the winning car depending on the weight of cars. Each car won or lost on this factor. The aerodynamics played a small factor in the race. The key to winning a race of this type comes down to weight, the lightest car wins. My recommendations for design changes are to lighten the car by carving more wood off the model. I would also use lubrication in the axles to reduce friction in the car going down the track. What I wouldn t change is my design I like the idea of the cars to have a little bit of style going down the track. The key to keeping my design and winning the race would have been to drill as many holes in my model to lighten it up but not to lose the strength of the model in key places during the impact at the end of the race. 8

SkillsUSA California

SkillsUSA California CO2 Dragsters Engineering Competition Objective To design, engineer, fabricate, and race a CO2 powered dragster. About The Competition This is an open contest to all SkillsUSA members, regardless of regional