1. Team Gun Show Final Presentation December 1, 2004 Group Members: Nate Griggs Clay Hamlin Marc Manning Jon Megahy Van Vo Joel Williamson

2. Project Overview Problem Concept & Objectives Existing Product & Limitations Problem Statement & Constraints Design Partition Pair-wise Comparison Conceptual Design Prototype Review Conclusion Future Concepts

3. Problem Statement & Objectives Our Customer is a Sporting Event Promoter Repeatable Firing Mechanism for T-Shirt Gun to be used for promotional events Customer Needs Ability to fire at least 5 T-shirts before reloading More rapid loading/firing of T-shirts Less operation labor

4. Existing Product Limitations: Length of Loading Time Labor Intensive Loading

5. Existing Product Limitations: Only Capable of Single Shot Operation

6. Design Specifications & Constraints Safety Precautions allow for only design of the repeating modifications, not the firing assembly Specifications/Constraints Should attach to existing device Less than 4 feet in length Total weight should less than 35 lbs Operable by one person Rubber seals to handle pressure Cost effective

7. Design Partition 4 Main Sub-Systems Barrel Provides the means for directing t-shirt in a desired direction at high velocity Would most likely be a tube of some sort. Barrel housing / Slide Forms the “body” of the assembly Responsible for holding all of the other subsystems together Facilitates necessary movement of parts in the assembly

8. Design Partition (continued) 4 Main Sub-Systems (cont.) 5 Shot Queue Will allow for at least 5 t-shirts to be stored and subsequently fired in rapid succession Gun Rear Will contain the rear seal for the firing chamber along with the firing mechanism. Firing Mechanism will NOT be improved upon (commercially available); taken as a given

9. Pair-wise Comparison Weighting Criteria

10. Selection Analysis Pair-wise Comparison

11. Conceptual Design Open/Loading Position Barrel Coupling Grip S-Slide Revolver Housing Firing Chamber Existing Trigger Mechanism Isometric View of Open Position Revolver Gasket

12. Conceptual Design Closed/Firing Position Barrel Coupling Grip S-Slide (sheathed by Grip) Isometric View of Firing Position Revolver Revolver Housing Firing Chamber Existing Trigger Mechanism

13. Conceptual Design Indexing Assembly Spring Ratchet Firing Chamber

14. Conceptual Design S-Slide Isometric View of S-SlideTop View of S-Slide Open Locked and Ready to Fire

15. Conceptual Design Pumping Assembly s-slide grip

16. Conceptual Design Animation

17. Prototype Open/Loading Position Barrel Coupling Grip S-Slide Revolver Housing Firing Chamber Existing Trigger Mechanism

18. Prototype Closed/Firing Position Barrel Coupling Grip S-Slide (sheathed by Grip) Revolver Housing Firing Chamber Existing Trigger Mechanism

19. Prototype Indexing Assembly

20. Prototype S-Slide

21. Conceptual Design Pumping Assembly

22. Prototype Video

23. Conclusions Design vs. Prototype: Major problem with prototype is substitution of welds Prototype uses many material substitutions Repeatable Firing Mechanism for T-Shirt Gun to be used for promotional events Project Constraints: Safety Repeatable Firing Sealing Operation Ease Revolver Design is Best Solution for Criteria

24. Future Concepts Attach a Firing Mechanism Test Seals Test Launching Distance Test Operation Ease Pneumatic Indexing System Aesthetic Improvements Make Design more Robust for Mass Production/Easier Manufacturability

25. Questions/Suggestions?