1. ME 489 Formal Design Review September 22nd, 2004 Garrett Davis Matt Moody Arnar Thors

2. Background Info The Great Moonbuggy Race –NASA/Marshall Space Flight Center –US Space & Rocket Center –University of Alabama High School Student Customers –Vinemont High School

3. What is GMR? Human-powered 2 passengers – female & male Must collapse into 4’x4’x4’ volume 15” from ground 20 ft vehicle carry 20 ft turning radius

4. Customers Vinemont High School 15 high school physics students Political Implications –UA Recruitment –Vinemont HS Involvement –NASA Awareness

5. Customer Req’ts Adjustable Seat Suspension/Stability Lightweight Rear Steer/Front Drive Comfortable Seats Colorful Single-gear drive One-Steer/One-Brake Steering Wheel Type (Primary) Tires – Hoss-Daddy

6. Side-by-Side Seating Concept #1 Front/Rear WB Cam-style Steering Rear Drive/Derailleur Triangle cross-section frame

7. Concept #2 Front WB/Rear Swingarm Cable/Pulley Style Steering Rear Drive/CVT Gearing Square cross section frame

8. Concept #3 Front Swingarm/Rear WB Rear Rack & Pinion Steering Front Drive/Derailleur w/ rev I-Beam, T-shape frame

9. Concept Evaluation Criteria Weighting Concept #1Concept #2Concept #3 Weight20%0.40.20.6 Safety20%0.2 0.5 Manufacturability15%0.23 0.45 Ergonomics/Comfort5%0.150.10.05 Size10%0.10.25 Simplicity10%0.10.25 Maneuverability10%0.20.10.3 Gearing10%0.30.20.1 Total100%1.981.532.5

10. Concept #3

11. Concept #3 Development Concept deviations –Change of frame cross-section –Derailleurs ditched for single speed –Reverse undecided –Independent swingarms changed to solid Further Development –All aluminum frame/suspension comp. –Adjustable seating position refined –Main frame structure reinforced

12. Concept #3 Development Major Areas of Concern: –Main Frame Member –Swingarm –Front Axle Sizing –Sustainability (common replacement parts, fatigue analysis) –Shock/Spring Choice –A-Arm Geometry/Size –Balance/CG (ride height/weight distribution) –Cost Effective Material/Parts Choice –Cost Effective Fabrication Techniques

13. Future Plans 8/29/049/5/049/12/049/19/049/26/0410/3/0410/10/0410/17/0410/24/0410/31/0411/7/04 Planning Meeting Team Organization Concept Generation Customer Meeting Concept Evaluation Design Development Formal Design Review Parts Gathering Design Review #1 Construction Design Review #2 In-House Testing Customer Testing Final Adjustments (Repairs) Design Review #3 Final Presentation

14. Future Plans Construction –Group-Wide Limitations –Intentions to Build Separate from UA Engineering Machine Shop Student Projects Building Access to Shelton State facilities Access to privately owned businesses/shops –Individual Construction Schedule

15. Future Plans Procured Parts Listing: –Major Aluminum Frame Members –Minor Suspension Members –Tires/Wheels –Rack-n-Pinion –Steering Column & Wheel –Brake Caliper –Steering Linkages –Shock/Spring Selections –Seat Material

16. Conclusion Questions?