P14031: Jib Transfer Bench Matt Brunelle Nicole Conway Mike - - PowerPoint PPT Presentation

P14031: Jib Transfer Bench

Matt Brunelle Nicole Conway Mike Kennedy Katy Wurman

Project Definition

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,

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

width of the sailboat, without the use of their legs or core muscles.

• Project Goals
• A fully-functional prototype that is:
• lighter
• cheaper
• easier to assemble and manufacture
• Constraints
• Designed for use with the Sonar class of sailboats
• Completely mechanical solution
• Designed for ease of reproducibility
• Cannot require alteration of the boat or cause damage

What’s a jib?

• The smaller triangular sail

towards the bow (front)

• f 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

• verall forward boat

speed.

P14031 Problem Statement

• Current State
• A jib transfer bench was created in Spring 2013 (P13031) that is heavy,

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

width of the sailboat, without the use of their legs or core muscles.

• Project Goals
• A fully-functional prototype that is:
• lighter
• cheaper
• easier to assemble and manufacture
• Constraints
• Designed for use with the Sonar class of sailboats
• Completely mechanical solution
• Designed for ease of reproducibility
• Cannot require alteration of the boat or cause damage

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
• 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:
• One-sided weakness
• Stroke
• Traumatic brain injury
• Spinal injury
• Limited core strength
• May need secure harness
• High-functioning quadriplegic
• Still have some grip

strength

• Ability to be used in

conjunction with existing stability bar

Use of device

Stored under gangway Installed in boat before each use Used in wet environment Removed immediately after sailing Taken out in pieces

Customer Requirements

Customer Reqt # Importance Description CR1 1 Make it easier for the jib trimmer to move between port and starboard CR2 2 Decrease the time required for the jib trimmer to move between port and starboard (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 CR1 Make it easier for the jib trimmer to move between port and starboard Maximum force required to traverse the width of the boat ↓ lbs of force CR2 Decrease the time required for the jib trimmer to move between port and starboard (compared to if they have no use of their legs and limited core strength without an assistive device) Transfer time between port and starboard ↓ Seconds 5 2 CR3 Lightweight design Total weight of device ↓ Pounds 100 50 CR4 Eliminate the need for the jib trimmer to make contact with the floor of the boat while moving between port and starboard Is contact required? Binary Yes/No

• No

CR5 Provide jib trimmer access to the jib lines Are lines accessible? Binary Yes/No

• Yes

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

CR7 Normal entry and exit from device is easy Time to get into seat ↓ Minutes 5 2 Time to get out of seat ↓ Minutes 5 2 CR8 Device is safe in emergency Time to release from device (in case of Emergency) ↓ Seconds 5 2 CR9 Provide support for core (possibly legs) Deivce's weight capacity (at upright seated position) ↑ Pounds 220 265 CR10 Device is easy to install Time to install ↓ Minutes 20 5 CR11 Corrosion resistance Are all components chosen for corrosion resistant properties? Binary Yes/No

• Yes

CR12 Device does not hinder the ability to see/observe surroundings (people, conditions, boats) Does the device hinder the crew's ability to

• perate the boat?

Binary Yes/No

• No

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 CR14 Design has minimal manufacturing time of components (custom parts) Percentage of custom parts used in design (custom parts cannot be purchased 'off-the- shelf' in a store or online) ↓ Percentage 15 5 CR15 Machining minimizes the use of specialized equipment Percentage of custom parts used in design (custom parts cannot be purchased 'off-the- shelf' in a store or online) ↓ Percentage 15 5 CR16 Device cost is the same or less than the current design Total cost to manufacture ↓ Dollars CR17 Seat should accommodate multiple body types % of users tested who find seat "comfortable" ↑ Percentage 60 75 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?