1. Engineers: Richard Dzionara-Norsen (ME) Jeffery Flowerday (ME) Jonathan Nguyen (ME) Kassandra Schlott (IE)

2. Project Overview ●Re-design an assistive sailing device ● Must fit in Sonar-Class Sailboat ● Must be non-permanent, mechanical system ● Design should allow anyone to use/build

3. Background P12031 – Redesigned seat made by Keith Burhans, and catalogued parts P13032 – Designed seat to fit 90% of population *Both designs used same steering device

4. Project Objectives ● Maintain adjustability ● Steer Sonar Sailboat ● Minimize: ● cost of system ● system weight ● number of custom/machined parts ● system installation and build times

5. Design Approach Changed customer needs into measurable parameters

6. Important ERs Degree of tiller rotation Minimum of 45 degrees Lock points along track At least 3 stop points Force required to move tiller no more than 12 lbs Number of tools needed Less than 5 different tools

7. Design Approach ● Trip to Piers Park Sailing Center to better understand customer needs and design application ● Worked with current devices to assess pros and cons of future prototypes

8. Final Design

9. Final Design Overview ● Used some pieces from previous design ●Track Platform ●Chair Platform ●Base Platform ● PVC Components: ● Lighter ● Cheaper ● Easier to modify/replace

10. Components: PVC Chair ●Design for 90% of population ●Lighter ●Cheaper

11. Components: Track Platform Supports ●Taken from P13031 (previous Jib Transfer group)

12. Components: PVC Steering Arms ●Customizable ●Less custom parts ●Intuitive design

13. Line Diagram - Side

14. Line Diagram - Top

15. Test Results ●22 degrees of tiller rotation ●Infinite amount of lock points ●Steering system doesn’t fail under extreme loads ●Installation: ●Time reduced ●4 Tools

16. Design Successes ● Reduced: ● System weight ● Overall system cost ● Custom/machined parts ● Improved steering ● More genuine sailing experience ● Easier to assemble ● Easier system assembly/installation ● User does not come in contact with boom

17. System Shortfalls ●Tiller has limited range of motion ●Smaller “gear ratio” than previous iterations ●Lines bind under excessive pressure ● Some machined parts still present ● Range of motion limited ● Chair and steering conflicts

18. Future Improvements ● Focus on steering for maximum usage ● Simplify handholds ● Work with more local disabled sailing communities

19. Overall Lessons Learned ● Importance of planning ● Independent decision making ●Difference between customer needs and feasibility ● Ropes are for cowboys

20. Questions?