SOAP February 27, 2014 Armstrong Hall of Engineering 1 SOAP.

SOAPFebruary 27, 2014

Armstrong Hall of Engineering

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Presentation Overview Project Identification/Development Body Team Braking Team Steering Team

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Project Objectives To empower kids To provide engaging experience Make car available as a kit

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Indianapolis Soap Box Derby Hosts Super Kids Race http://indianapolissoapboxderby.com/home

Super Kids Race

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Specifications

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Number of Children 100

Weight of Child and Adult 300 - 500 pounds

Height of drivers 4 – 6.5 feet

Number turns per child 2 – 3 per day

Height of Hill 40 feet

Max Speed 35 mph

Max Turning Radius 15 feet

Length of Track 1500 feet

Cost $1000

Braking Distance 300 feet

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Survey Results – Customer Priorities

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Survey Results - Cost

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Budget Breakdown Budget for 2013-2014 year - $1500 Budget remaining - $822.30 Current Cost of Prototype -

$791.14 Target cost for car – $1000

Future Expenses Front wheel breaks Rear steering system with override Rear axle mounting system

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Cost of Prototype2013 Expenses Toward Prototype Price

Seats 200

Seatbelts 49.98

Brake pads 36.71

ODYSSEY brake cable 32.95

2” x 4” x 8’ boards 15.54

½” 4 x 8 plywood 99.80

Spray paint 24.72

Wood Filler 11.58

Steering system 165.98

Wheels 123.88

2014 Expenses Toward Prototype Price

Axles 20.00

Seating Housing 10.00

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Design Evolution

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Prototype IV

Prototype I Prototype II & III

Design Process: Where are we?

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Body Team

Brake Team

Steering Team

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Team Breakdown

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Body Team: Nick F,

Lakshya G, Alexandra M.

Brake Team: Jake S,

Rachel P, Justin S

Steering Team: Nick L, Alan G, Pulkit P

Body Team

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Team Members: Nicholas Farley (team leader) Alexandra Milat Lakshya Gupta

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Questions/Comments

Braking Team

Team Members Jake Schramm - Project Leader Justin Sohn -Webmaster Rachel Pauley - Team Liaison

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Semester Progress Determined exact location of brake pedal Decided to buy new brakes parts as opposed to transferring old

ones Visited Go-Kart and Bike Shops to research new parts Research prices

Semester Progress Created Decision Matrix on Emergency Brake System Traveled to stores Matching tires on car Purchased Brake Parts Started assembling braking system Planning and collaborating on brake assembly with Steering Team

Gantt Chart

Emergency Brake System

Challenge with Tires Original tires would not work with our brakes Two Options

Buy 4 New tires Purchase 2 new tires for back wheels

Purchased Parts

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Purchased Parts

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Purchased Parts

Purchased Parts

Brake System Assembly (Pictures)

Attachment of Brakes on Car Planning Stage Collaborated with steering team

Axle Welding of Parts

End of Semester Prepare sketches for brake system Plan on how to apply brakes for next semester Prepare transitional document

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Questions/Comments

Steering Team

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Steering Housing Calculated the

location of the steering housing-14” tall 12” from front

Based off the angle of the steering shaft, location of the front seat and height of the car

Steering Housing 4x4 piece of wood

drilled into the floor of the car

Hood of the car rests on top of the housing

Attached steering wheel to steering shaft

Steering Housing

Drilled hole in the floor for the steering shaft

This allows the shaft to be attached to the linkage on the front axle

Underside of the Body Consisted of a

combination of our original design and a bedframe design

Decided on this after a 6-3-5 brainstorming activity

Underside of the Body Used 2x2 pieces of

wood and L-brackets

Will test deflection with the same test plan that was used on the old underside of the body

Axle Test

Step 1: We placed our front axle with the steering linkage fully assembled inside a clamp to support it

Axle Test

Step 2: Going by increments of 10 pounds, we slowly added weight to each spindle until the axle started to break

Axle Test

Step 3: At 160 pounds the screws on either side of the wood started to rip out of the wood

Solutions Change axle material Brackets Change orientation of U-bracket

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Questions/Comments

DFMEA (Separate into Teams) Steering System – 720/1000 RPN

Improper slip clutch setting Durability of Brakes – 200/1000 RPN

Must function properly during all day race Wheels Axle

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