1. Jib Transfer Bench – P13031 1/11/2012

2.  Problem Definition  Customer Needs / Specifications  Functional Decomposition  Benchmarks  First CAD Design  Concept Generation  Selection Criteria Matrix  Preliminary Calculations  Budget Estimate  Project Plan

3.  Task is to design a mechanical solution to move a disabled jib trimmer from side to side so they can perform their crew function

4. SEE METRICS CHART

5.  Gary & Zak ◦ No leg mobility / core support ◦ Desires to be fully secured  Cindy ◦ Partial leg & core strength ◦ Desires freedom to exit seat ◦ Limited footprint available due to Richard’s chair  Height differences to consider

9.  Must be able to translate AND rotate independent of each other (i.e. not fixed)

11. Platform Top Travel Bars Bottom Travel Bar Traveler Seat Bracket Seat Support Bar

15.  Handhold mechanisms on the previous team’s captain’s chair

16.  We plan to use something similar to secure our device to the front handholds to the boat

17.  Brainstormed ideas for each main component of our assembly: ◦ Seat ◦ Method of motion (translation and rotation) ◦ Method of propulsion ◦ Harness ◦ Locking mechanism  All must fall within our size constraints for Richard’s boat and without extending into the other team’s footprint

18.  Concept: Chair that can rotate on a pair of rails spanning the boat  Problem: With full 180° rotation, legs will smack

19.  “Seat-Within-A-Seat” initial sketch ◦ Swivel chair on rails that span the boat One bar w/ bottom support Two bar w/o support

20.  Telescoping arm anchored on the boat floor (platform) ◦ Seat mounted on top of arm

21.  Jib trimmers with limited core strength ◦ Propel themselves linearly ◦ Rotate themselves ◦ No electrical solution, 100% mechanical

22.  Settled on a purchase system ◦ Pulley system that will allow the user to pull themselves with a mechanical advantage

23.  Currently, not settled on a specific lock. ◦ Fence lock, pin lock, friction plate ◦ Cleating purchase system lines to lock chair  Check prices  Check compatibility of what we want to do

24.  Must support jib trimmer’s ◦ Torso ◦ Legs  Should have capability to accept and secure a user’s wheelchair cushion should they wish to use it.

25.  Lazy Susan design

26.  Swivel Stool Go-Kart Seat Racecar Seat

27.  5-point harness  Secured Double-Velcro vest  Lap Belt

28. Compiled all ideas, determined the best:  “Seat-Within-A-Seat” Chair  Harness or double-Velcro vest  Purchase system for motion  Undetermined locking mechanism  See Excel file

29. ComponentZak & GaryCindy Seat Go-Kart SeatSwivel Stool Torso Securing Mechanism 3/5 point HarnessLap Belt or Velcro Leg Support Wheelchair Footrestnone Method of Movement SWIAS 3-bar BB&B Movement Force 3-1 Purchase system Locking Mechanism Friction Brake & Cleats  Two separate systems based on individual customer needs

30.  Go-Kart Seat

31.  Stool

32.  Calculations to prove the design:  Using aluminum traveler bars  Box tube deflection – 7075 Aluminum ◦ Weight sitting on ◦ Deflection: -0.0000131 inches ◦ Shears at 19.9°  Box tube shear strength  Looking at smaller, cheaper, lighter materials

33.  Assuming 260-lb human

34.  Drop platform onto floor  Lock into first handhold (using similar locking device from Gold Medal Chair)  Jib trimmer sits in chair and straps in  Sail away!

35.  Based on the Gold Medal Chair: ◦ $1,658  Based on research of components that we are looking at: ◦ $2,000

38.  Continue with design phase  CAD Modeling  Create Bill of Materials  Prove Design  Detailed Design Review in 3-5 weeks  Order parts  Build, install, sail!