Hang Tight TEAM REMAKE Kelsey Barrera Mitch Reid Rishi Savaliya

Agenda????? Define the Problem Time Management Survey Brainstorming Research Donation Letters Existing Solutions Group Solutions Selecting an Approach First Prototype Second Prototype Third Prototype Test Procedures Test Results and Evaluation Refinements

Define the Problem Problem Statement According to the US Department of Transportation’s National Highway Traffic Safety Administration (NHTSA), approximately 57 million people in the United States rode a bicycle in the year The first bicycle that used a chain was invented in This resulted in the problem of bicycle chains falling off the gears. In a class of 27 students, 20 agree that bicycle chains falling is a problem that occurs very often and should be solved.

Define the Problem Statement of Purpose Create a product that will prevent the chain from falling off the gear of a bicycle.

Gantt Chart

Survey Survey Population: 145 Goals of conducting our survey  Target Market Information  Multiple causes of falling bike chains  Problem Justification  Product Pricing

Survey Data – Target Market Information Age Groups  14 and under  15 to 25 Ride bikes average of 1 to 5 times a week

Survey Data – Causes for Faulty Chains

Survey Data – Problem Justification

Survey Data – Product Pricing

Brainstorming Determined what specifically causes chains to fall off Create possible designs  No restraints  All ideas welcome Build off team members’ ideas for best preliminary designs

Research Why do bike chains fall off?  Decreased tension makes the chain loose  Misalignment of the chain and sprockets Does not mean a bike cannot be used

Donation Letter Explained reason for writing Asked bike manufacturers to donate bikes  Schwinn  Mongoose/Pacific Cycle  Trek Bicycle  Raleigh America Inc.  Cannondale Bicycle Corp. Benefits to companies for contributions

Existing Solutions Drive-shaft driven bicycle  Eliminates chain Patent

Existing Solutions Chain catcher for bicycles  Does not prevent chain from falling Patent

Existing Solutions Motorized bike with gear and chain cover Patent

Group Solutions Individual drawings

Criteria and Constraints Easy to use Aesthetics Functionality Material Cost Feasibility Adaptability

Select an Approach ConstraintWeightSketch 1Sketch 2Sketch 3Sketch 4Sketch 5 Ease of Use Aesthetics Functionality Material Cost Feasibility Adaptability Total

Develop a Design Proposal Created a Build Process Completed a material and cost analysis Created technical drawings for final concept

First Prototype Foam

Second Prototype Wood

Third Prototype ABS Plastic Rapid Prototyping Machine

Test Procedures Chain Alignment  Chain must stay aligned with prototype wheels Drop Test  See effect of various riding terrains on prototype Durability Test  Chain stays aligned for a given period of time Rider Interference  Prototype cannot prevent rider from pedaling properly

Test Results and Evaluation Wooden prototype passed all tests

Refinements