Team Members: Guide: Customer:

Madeline Hoppy Dr. Richard Lux Dr. Jeremy Haefner

Michael Kurvach

Nate Morefield

Ryan Wilson

Cody Woods

Tri Better Triathlon Shoe

Project Review

Purpose

The purpose of this Project Review is to:

Access the final status of design

Confirm satisfaction of customer needs and design specifications

Review the budget and schedule

Project Mission Statement

The goal of this project was to develop a shoe and pedal

system for triathletes which reduces cycling to running

transition time during competition without compromising

cycling or running speed.

Customer Needs Critical Needs

• Flexibility while running

• Lets the triathlete transition faster

• Shoes can be left on the pedal when not in use

• Easy clip out

• Good power output

• Long pedal life

• Secure attachment to pedals

Non-Critical Needs

• Easy clip in

• Comfortable

• Float and Adjustability in the Pedal

Engineering Specifications

Concept Summary

Adjustable Coupling

Allows Bike Shop to make necessary custom adjustments

Full Length Rigid Pedal

Allows the shoe to remain flexible for the run but stiff for good

energy transfer during cycling

Forefoot and Heel Clip System

System Architecture

Four Main Components:

1. Coupling

2. Pedal

3. Front Clip

4. Rear Clip

System Architecture

Design Summary: Coupling

Machined from aluminum

Easily attached to spindle

Allows rotational adjustments

to be made to the pedal

Design Summary: Pedal

Made from carbon fiber to reduce the weight of the system

Provides rigidity for cycling power transfer

Allows forward/backward adjustments

Interfaces with coupling, front clip, and rear clip

Design Summary: Front Clip

(Geometry)

Uses geometry of a mounted aluminum clip to interface with

the shoe

Shoe contains an imbedded Delrin washer to distribute the

clip pressure and allow for ease of clipping in/out

Design Summary: Heel Clip

Clip interfaces on to an imbedded Delrin rail

Press directly on rail to clip in and twist to release

Hold ankle to the rigid pedal

Testing Results Description Units Actual Marginal Ideal Performance

Flex Force N 40 <=45 <=30 Marginal

Transition Time Saved s 8 >=0 >=10 Marginal

Shoe Mounted on Bike? Y/N Yes Yes Yes Ideal

% Clip out % 100 >=75 >=95 Ideal

Power Output % 0 0 Ideal

Factor of Safety 8 >=3 >=5 Ideal

Rider able to unclip while riding Y/N No No No Ideal

% Clip in % 100 >=50 >=95 Ideal

% Willing to reuse % 100 >=50 >=80 Ideal

Float deg 20 >=0 >=15 Ideal

Clearance mm >1 >=1 Ideal

Adjustment mm 8 >=5 >=10 Marginal

Rotational Adjustmet (shims) deg 10 >=0 >=5 Ideal

Shoe Weight g 253 <=370 <=200 Marginal

Shoe/Pedal Weight g 670 <=700 <=500 Marginal

Budget Items Vendor Purchaser Cost

Breather Joann Fabrics Ryan 11.39

Barge Cement CMS Ryan 9.46

Epoxy Aeromarine Ryan 50.00

Balsa Wood Fibre Glast Ryan 54.90

Sole Material De La Torre Ryan 27.00

Pedals Berts Bikes Ryan 17.27

Board, Peel Ply, Caulk etc Home Depot Ryan 54.14

Carbon Fiber Soller Composites Cody 90.82

Aluminum Speedymetals Mike 61.80

Plastic, Ball bearings McMaster Carr Nate 41.14

Plastic Sheet Curbell Plastics 30.00

Actual Sub Total 442.92

Budget 500.00

Surplus 57.08

Initial Projected Cost (08FEB13 ) 584.93

Schedule Comparison Task Anticipated Completion Actual Completion

Coupling Complete Week 4 Week 3

Carbon Fiber Pedal Complete Week 4 Week 5

Front Clip Complete Week 3 Week 4

Rear Clip Complete Week 2 Week 3

Build EVA Sole Week 4 Week 5

Redesign of Front Clip --- Week 7-8

Testing Week 7 Week 8-9 Documentation and Final Presentation Week 10 Week 10

Objective Project Evaluation

Successful development of concept

Successful construction of prototype

Meet overall schedule and major deadlines

Completed project under budget

Further refining still needed on certain elements

Future Work

More iterations with Front Clip Deformation method to fine

tune the design

Determining a reasonable manufacturing process

Redesign of a lighter coupling

More product testing

Marketing

Acknowledgements Dr. Rick Lux-Guide

Dr. Jeremy Haefner-Customer

Bob Michalski-Puma SE

John Bonzo-Brinkman Lab

Towpath Bikes

Steve Stanziano

Pat Renahan

Steven Howe-Testing Components

Professor Carl Lundgren-Composites Consultant

Mark Smith-MSD