Project Definition P14031: Jib Transfer Bench Matt Brunelle Nicole Conway Mike Kennedy Katy Wurman
Agenda • Team Introduction and Roles (1 minute) • Problem Statement (3 minutes) • Background Information (2 minutes) • Project Deliverables (1 minute) • Device Use (2 minutes) • Requirements (5 minutes) • Project Schedule (2 minutes) • Potential Issues/Risks (1 minute) • Questions and Feedback
Team Introduction and Roles Member Major Role Matthew Brunelle Mechanical Engineer Engineer Nicole Conway Mechanical Engineer Engineer Michael Kennedy Mechanical Engineer Engineer Katy Wurman Industrial Engineer Project Leader
P14031 Problem Statement Current State • A jib transfer bench was created in Spring 2013 (P13031) that is heavy, o expensive, labor-intensive to assemble, and accommodating of a strict size constraint present at the time. Desired State • A jib transfer bench that enables a jib trimmer to move transversely across the o width of the sailboat, without the use of their legs or core muscles. Project Goals • A fully-functional prototype that is: o lighter • cheaper • easier to assemble and manufacture • Constraints • Designed for use with the Sonar class of sailboats o Completely mechanical solution o Designed for ease of reproducibility o Cannot require alteration of the boat or cause damage o
What’s a jib? The smaller triangular sail • towards the bow (front) of the boat In downwind sailing, it • acts to provide a greater total sail surface area for the wind to act upon In upwind sailing, it acts • as an airfoil, while also funneling more air onto the mainsail, and therefore helps with the overall forward boat speed.
P14031 Problem Statement Current State • A jib transfer bench was created in Spring 2013 (P13031) that is heavy, o expensive, labor-intensive to assemble, and accommodating of a strict size constraint present at the time. Desired State • A jib transfer bench that enables a jib trimmer to move transversely across the o width of the sailboat, without the use of their legs or core muscles. Project Goals • A fully-functional prototype that is: o lighter • cheaper • easier to assemble and manufacture • Constraints • Designed for use with the Sonar class of sailboats o Completely mechanical solution o Designed for ease of reproducibility o Cannot require alteration of the boat or cause damage o
P13031: Existing Iteration • For use with Sonar class sailboat • Allows disabled people to sail • 270 lb weight capacity • Heavy (125 lbs) • Labor intensive to assemble Multiple people required o • Not ideal for small- scale production • Many custom parts
Project Deliverables • Functional jib transfer bench that meets the customer’s requirements • Detailed design plans for manufacturing • Installation and assembly instructions • User manual for proper device use
Stakeholders • Adaptive sailing programs/centers • Staff and volunteers • Disabled sailors or potential sailors • RIT • MSD team
Use Scenarios Considered • At Piers Park, youngest users usually 18-20 yrs old • Typical users have: o One-sided weakness • Stroke • Traumatic brain injury • Spinal injury o Limited core strength • May need secure harness o High-functioning quadriplegic • Still have some grip strength o Ability to be used in conjunction with existing stability bar
Use of device Stored under gangway Installed in Taken out in boat before pieces each use Removed Used in wet immediately environment after sailing
Customer Requirements Customer Reqt # Importance Description CR1 1 Make it easier for the jib trimmer to move between port and starboard Decrease the time required for the jib trimmer to move between port and starboard CR2 2 (compared to if they have no use of their legs and limited core strength without an assistive device) CR3 1 Lightweight design CR4 3 Eliminate the need for the jib trimmer to make contact with the floor of the boat while moving between port and starboard CR5 1 Provide jib trimmer access to the jib lines CR6 1 Design is an entirely mechanical solution CR7 2 Normal entry and exit from device is easy CR8 1 Device is safe in emergency CR9 1 Provide support for core (possibly legs) CR10 2 Device is easy to install CR11 1 Corrosion resistance CR12 1 Device does not hinder the ability to see/observe surroundings (people, conditions, boats) CR13 1 Device is safe to operate/use around all people in the boat CR14 2 Design has minimal manufacturing time of components (custom parts) CR15 1 Machining minimizes the use of specialized equipment CR16 1 Device cost is the same or less than the current design CR17 2 Seat should accommodate multiple body types CR18 1 Device must fit in the Sonar class of sailboat Importance Scale: 1 = High Priority, 2 = Medium Priority, 3 = Low Priority
Engineering Requirements CR# Customer Requirements Metrics Direction Units Marginal Target Make it easier for the jib trimmer to move between port and Maximum force required to traverse the width of ↓ CR1 lbs of force starboard the boat Decrease the time required for the jib trimmer to move between ↓ CR2 port and starboard (compared to if they have no use of their legs Transfer time between port and starboard Seconds 5 2 and limited core strength without an assistive device) ↓ CR3 Lightweight design Total weight of device Pounds 100 50 Eliminate the need for the jib trimmer to make contact with the CR4 Is contact required? Binary Yes/No - No floor of the boat while moving between port and starboard Are lines accessible? Binary Yes/No - Yes CR5 Provide jib trimmer access to the jib lines ↓ User's reach distance to access lines Inches 25 15 CR6 Design is an entirely mechanical solution Does the design only contain mechanical parts? Binary Yes/No - Yes ↓ Time to get into seat Minutes 5 2 CR7 Normal entry and exit from device is easy ↓ Time to get out of seat Minutes 5 2 Time to release from device (in case of ↓ CR8 Device is safe in emergency Seconds 5 2 Emergency) Deivce's weight capacity (at upright seated ↑ CR9 Provide support for core (possibly legs) Pounds 220 265 position) ↓ CR10 Device is easy to install Time to install Minutes 20 5 Are all components chosen for corrosion CR11 Corrosion resistance Binary Yes/No - Yes resistant properties? Does the device hinder the crew's ability to Binary Yes/No - No CR12 Device does not hinder the ability to see/observe operate the boat? surroundings (people, conditions, boats) ↑ User's rotation in device (to each side) Degrees +/- 30 +/- 45 ↑ CR13 Device is safe to operate/use around all people in the boat Vertical distance between seat and boom Inches 33 38 Percentage of custom parts used in design CR14 Design has minimal manufacturing time of components (custom ↓ (custom parts cannot be purchased 'off-the- Percentage 15 5 parts) shelf' in a store or online) Percentage of custom parts used in design ↓ CR15 Machining minimizes the use of specialized equipment (custom parts cannot be purchased 'off-the- Percentage 15 5 shelf' in a store or online) ↓ CR16 Device cost is the same or less than the current design Total cost to manufacture Dollars % of users tested who find seat ↑ CR17 Seat should accommodate multiple body types Percentage 60 75 "comfortable" CR18 Device must fit in the Sonar class of sailboat Does device fit? Binary Yes/No - Yes
Project Schedule
Potential Issues and Risks • Project Funding – lost NSF grant • Have yet to interview the customer who used the previous prototype
Questions?
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