Team Members: Ryan Wilson Cody Woods Nate Morefield Mike Kurvach

1. Tri Better Triathlon Shoe Team Members: Ryan Wilson Cody Woods Nate Morefield Mike Kurvach

2. Agenda • Project Mission • Background • Design Objectives • Concept Selection Process • Concepts • Comparison • Schedule

3. Design Review Purpose • Obtain Feedback on Design Concepts • Identify Design Problems

4. Project Mission • The purpose of this project is to design a triathlon shoe for competition by combining the advantages of a cycling shoe and a running shoe. • When successful this project will reduce transition times while maintaining running and cycling performance.

5. Background • Triathlon-Swim, Bike, Run • Sprint Distance- 750m Swim, 20k Bike, 5k Run • Olympic Distance- 1.5k Swim, 40k Bike, 10k Run • Transitions: • T1- Swim to Bike • T2- Bike to Run

6. Current Situation Pearl Izumi Tri Fly IV Zoot Ultra Race 3.0 Pedal Cages

7. Key Objectives in Design • Flexibility During Running • Good Power Output During Cycling • Secure Attachment to Bike Pedal • Ability to Clip Out of Pedal with Ease • Provide Float • Ultimate Goal is to reduce transition times without hurting cycling or running performance

8. Concept Selection Process

9. Concept Selection Process • Good Power Output Dur

10. Concept 1 -Full Length Pedal -Internal Forefoot C-Clip -Heel Clip Advantages: -Rigid Plate Provides Stiffness only when Cycling -Easy to clip out and Transition to Running

11. Disadvantages: -Rubber Sole Hinders Float -Forefoot Clip Components will Add Stiffness During Running -Large Pedals Add Weight to Design -Clipping in Requires Two Motions -EVA Foam will Dampen Energy Transfer During Cycling

12. Risks: -High Weight: Estimated Weight 330g per Shoe 270g per Pedal -Difficulty Working with Carbon Fiber -Energy lost in cycling due to deformation

13. Concept 2 -Removable Rigid Fork -Pedal/Fork Interfacing Clip Advantages: -Ridged Insert is Removed During Run -Compact Pedal -Simple Clipping Concept

14. Disadvantages: -Void in the Shoe After Removing Insert -Lost Energy From EVA Foam Dampening During Cycling -High Stress on Fork Could Cause Failure or Deformation

15. Risks: -High Stress on Fork: 580 MPa in Tension -Aligning Fork and Clip Difficulty -Biomechanical Issues During Run -Failure to distribute pressure from foot -Removing and inserting fork may be difficult

16. Concept 3 -Rigid “Hinged” Plate -Low Profile Mini Clip Advantages: -Hinged Plate Reduces Excess Movement While Cycling -Hinged Plate Flexes While Running -Pedal Engages Rigid Plate

17. Disadvantages: -Lost EVA Foam Volume for Pedal Clip -Constrained Flexibility While Running

18. Risks: -Determining the Flex Points Common for All Athletes may Prove Difficult -Maybe too Stiff for Running but too Flexible for Cycling -Failure to distribute pressure from clip

19. Comparison

20. Schedule • System Design Weeks 4-5 • Resource Summary Data Base Weeks 4-5 • Analysis Weeks 4-8 • Detailed Design Weeks 4-8 • Detailed Design Review Week 9 • Order Materials Week 10