1. Natasha Hyare Ryan Benson Casey Carlin
Team Zero
Natasha Hyare Ryan Benson Casey Carlin

2. Project Overview Introduction Problem Criteria & Constraints
Preliminary Ideas
Refinement
Calculations
Implementation/Final Design
Results/Discussion
Conclusion
Suggested Improvements
Acknowledgements

3. Introduction
Build an All-Terrain Vehicle that can complete the assigned course using only the materials provided.
Use engineering concepts we learned, such as the design process and teamwork skills to complete our project.

4. Problem Criteria & Constraints
Must
Carry 3 golf balls
Complete the course
Must Not
Use extraneous
materials
Leave the course
Fall apart
Criteria
Balance
Speed
Torque
Minimize
Weight
Size

5. Preliminary Ideas Cardboard box siding/frame
Small profile and dimensions
Reduce weight
2 small CDs as front wheels, 2 big CDs as rear wheels

6. Preliminary Sketches Rubber band around wheels to increase traction
4 wheel drive to distribute motor power
Rubber band ‘booster’ on front wheels

7. Project Overview Refinement Introduction
Problem Criteria & Constraints
Preliminary Ideas
Refinement
Calculations
Implementation/Final Design
Results/Discussion
Conclusion
Suggested Improvements
Acknowledgements

8. Refinement Minimize volume used to hold golf balls
Make entire vehicle smaller

9. Refinement Use biggest gear as drive wheel
Use two small CDs as rear wheels 40 20 30 10

10. Refinement Increased structural support
Repositioned motor, gears, and payload with the elimination of the ramp

11. Calculations Angular Speed Calculation
V= Voltage, w = angular velocity, P = Power, I = Current, T = Torque M = mass F = Force, v = velocity, r = radius of drive wheel, a = acceleration.

12. Calculations Power Calculation
V= Voltage, w = angular velocity, P = Power, I = Current, T = Torque M = mass F = Force, v = velocity, r = radius of drive wheel, a = acceleration.

13. Calculations Torque Calculation
V= Voltage, w = angular velocity, P = Power, I = Current, T = Torque M = mass F = Force, v = velocity, r = radius of drive wheel, a = acceleration.

14. Calculations Torque at 1:4 and 1:6 gear ratios
V= Voltage, w = angular velocity, P = Power, I = Current, T = Torque M = mass F = Force, v = velocity, r = radius of drive wheel, a = acceleration.

15. Calculations Velocity
V= Voltage, w = angular velocity, P = Power, I = Current, T = Torque M = mass F = Force, v = velocity, r = radius of drive wheel, a = acceleration.

16. Project Overview Implementation/ Final Design Introduction
Problem Criteria & Constraints
Preliminary Ideas
Refinement
Calculations
Implementation/ Final Design
Results/Discussion
Conclusion
Suggested Improvements
Acknowledgements

17. Implementation of Final Design

18. Final Design

19. Final Design

20. Final Design

21. Final Design

22. Final Design

23. Results/Discussion 9.2 seconds 8.9 seconds 12.7 seconds 13.1 seconds
Team Zero’s Performance in Competition:
Distance in heat #1 (ft)
Distance in heat #2 (ft)
Performance Total
Rank (#/38)
5 ft
2 ft
4.5 36
Team Zero’s Performance in Testing:
(60 ft/smooth terrain)
(60 ft/rough terrain)
Test Heat 1
Test Heat 2
Test Heat 3
Test Heat 4
9.2 seconds
8.9 seconds
12.7 seconds
13.1 seconds

24. Project Overview Conclusion Introduction
Problem Criteria & Constraints
Preliminary Ideas
Refinement
Calculations
Implementation/Final Design
Results/Discussion
Conclusion
Suggested Improvements
Acknowledgements

25. Conclusion Strengths Small/lightweight Sturdy Fast
Innovative 3-wheel design
Weaknesses
Wheel Alignment
Poor Wire Design

26. Suggested Improvements
Problem #1- Car was scraping and got caught along the side wall
Adding a bumper along the sides as well as the front of the vehicle
Problem #2- The wires disconnected during the second trial
The wires could have been permanently attached to each other

27. Acknowledgements
DC Motor Torque/Speed Curve Tutorial
Profs. Khoie, Saviz and Stark

28. Questions?