Unit 91 Week 7

Jon Gutierrez, Chris Sauer, Simon Radomski, Chat Huynh, Jeff Burton, & Robert Platt

October 1, 2008

Mid-Term Presentation

Outline

Project Goal Problem Statement Design Partition Analysis Tool

Project GoalTo Create a bike that can jump off cliffs

Josh Bender

Josh Bender – YouTube.com http://www.youtube.com/watch?v=Y3qRy0Nj2uY

1

1.5

2

2.5

3

3.5

4

4.5

5

0 2 4 6 8 10 12 14Travel (in)

Mec

hani

cal A

dvan

tage

Regular Riding Landing Jumps

Problem Statement

Characteristics•Soft Suspension•High Traction

Characteristics•Hard Suspension•Maximum force to rider

ProductionDownhill Bikes Our Bike

Mechanical Advantage

0

100

200

300

400

500

600

700

800

900

1000

0 2 4 6 8 10 12 14

Travel (in)

Spr

ing

Forc

e (N

)

Problem StatementBegin Impact End Impact

Characteristics•Low Initial force

Goal: allow the rider additional reaction time

Characteristics•High Final Force

ProductionDownhill Bikes

Our Bike

Force To Rider

Design Partition

• Evaluate Wheel Path• Chain Extension• Affect of Geometries on Forces

Current Design

Isometric View

Current Design

Un-Compressed

Current Design

Compressed