P13031 - Jib Transfer Bench

1. P13031 - Jib Transfer Bench Team Members: Mike Walsh, Nick Davis, Charley Kowalyshyn, Zeb Koch Guides: Kate Leipold, Dr. DeBartolo

2. Project Description Project Motivation: • To provide an expanded and enhanced sailing experience for sailors with varying disabilities Project Goal: • To design a mechanical solution to move a jib trimmer from side to side on a Sonar class sailboat, allowing them to function as a member of the crew.

3. Concept Summary • Concept heavily influenced by space constraint required due to Captain’s Chair • 23”front to back available • Cantilevered design fit best in space constraint • Rotational and translational movement required for jib trimmer

4. Customer Needs Recap • Gary & Zak • No leg mobility / core support • Desires to be fully secured • Cindy • Partial leg & core strength • Desires freedom to exit seat when necessary • Limited footprint available due to P13032’s chair • Cindy needs the option to sail with Gold Medal Chair or as a standalone device

5. Design Summary • Two systems were to be built, requiring a comprehensive design to fit varying needs • Cantilevered seat – most viable option to fulfill needs at expense of weight, time and money

6. System Architecture • Main components: • Baseplate platform • Side seat platforms • Bench • Lazy susan • Seat • Purchase system • Handholds • Points of contact with the boat are: • Baseplate, side seat platforms, handholds, purchase system

7. Baseplate • Modeled on previous baseplate • Legs are bolted through metal plate underneath • Base clamps to bilge cover • Allows adjustability – forward and backward

8. Side Seat Platforms • Protects boat from interference with jib transfer bench • Provides surface to distribute any forces from system • Parts of purchase system mounted to these platforms

9. Bench • Pillow block and carriage provide linear motion on bar and track • Most expensive component in system • Heaviest component • Most complex to install

10. Lazy Susan and Seat • Durable lazy susan • Greased bearings • Rigid against torque • Provides enough friction for braking, but allows easy rotation too

11. Handholds • Provide adjustability to any Sonar handhold • Slides along 80/20 in X-Direction • 80/20 design allows for rotation to perfect angle • Slots in plates allow for extension into handhold cups • Turnbuckle gives max adjustability and security

12. Purchase System • Mounted behind occupant. Travels the width of device • Designed to give a 3-1 advantage

13. Purchase System

14. Cindy’s System w/o Captain’s Chair • Top of swivel stool used • Lap belt for support

15. Cindy’s System w/ Captain’s Chair • System moved forward on baseplate with front handhold used • Limits space for Cindy to move

16. Zak & Gary’s System • Bucket seat and 5-point harness provide support • Leg supports

17. Testing Results

18. Testing Results (continued)

19. Testing Results (continued)

20. Evaluation: Success and Failure • System is overweight • Had to be robust due to space limitation • System is expensive • System is unable to be manufactured on a large scale in its current design • Some specifications are not feasible • Adjusting for multiple configurations is time consuming

21. Suggestions for Future Work Zeb worked on the PRP to iterate this project again in the 2014 school year • Eliminate space constraint due to Captain’s Chair • Reduce weight • Reduce cost • More off-the-shelf parts • Less machining • Better corrosion resistance • Re-evaluate specs • Evaluate feedback on rotation – if it needs a brake mechanism

22. Questions, Comments?