Cross-Country Sit SkiProgress Report

Cody BarnettBetsy Camp

Josh MetzlerRobbie Quesada

Mark ScheelAlex Triplett

Academic Advisor: Dr. Hormoz ZarehIndustry Advisor: Jennifer ArmbrusterSponsor: PSU Inclusive Recreation

Agenda

• Introduction• Mission Statement• Final PDS• External Search• Internal Search• Concept Selection• User Survey• Project Schedule

Introduction

• Inclusive Dept. of Campus Rec wants a cross-country sit ski• Must accommodate various

– Body shapes– Injury types

Mission Statement

The objective of the PSU Sit Ski Team is to design and build a cross-country sit ski for the PSU Inclusive Rec Department. The sit ski must accommodate varying user size, weight, and injury type. The product and supporting documentation will be delivered to Inclusive Rec in June of 2012.

Final PDS

• Seat back adjusts from 19” to 25”• Seat back reclines from 90° to 120°• Footrest adjustable• Bottom of seat adjusts to 20°• Restraints for T12 to C5 injuries• Cost less than $1500

External Search

• Kiwi X-Country Ski– Lightweight– Adjustable footrest– Fixed seat

• Loss of core strength• Low to the ground

External Search

• Teton Nordic Sit Ski– Telescoping footrest– Molded seat is fitted– Frames custom-built– Does not mount to

commercially available bindings

External Search

• Central Cross Country– Footrest inadequate– Restraints do not

accommodate higher-level injuries

– Users have noted rubbing issues with seat material

Internal Search

• Brainstorming Sessions• Concept Designs

Internal Search

• Concept Designs– Seat– Frame– Adjustability– Restraints

• Overall Design Selection– Fundamental Design– Low-Risk Design– Improved Design

• Pros• Adjustability• Strapping points• Manufacturing ease

• Cons• Heavy• Manufacturing time

• Pros• Simple design• Some adjustability• Bucket seat

• Cons• Expensive seat & parts• Low adjustability

• Pros• Simple design• Robust frame• Low-cost seat

• Cons• Lack of adjustability• Lack of strap points• Expensive manufacturing

Concept Selection

Concept Selection

Design Strengths Weaknesses Visual

Fundamental Design

Simple design Some adjustability Bucket seat

Expensive seat and parts

Low adjustability

Low-Risk Design

Simple design Robust frame Low-cost seat

Lack of adjustability Lack of strap points Expensive

manufacturing

Improved Design

High adjustability Strapping points Manufacturing ease

Heavy Manufacturing time

User Survey

• User online survey– Validate design decisions– Utilize users’ experience

and knowledge

Project Schedule

Start Date Finish Date

Design December 1 April 5

Manufacturing April 2 May 16

Testing May 17 May 31

Final Delivery June 8

• PDS• Internal Search• External Search• Detail Design

Summary

• Introduction• Mission Statement• Final PDS• External Search• Internal Search• Concept Selection• User Survey• Project Schedule

Questions

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