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 o 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 o 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 o A fully-functional prototype that is:

• lighter

• cheaper

• easier to assemble and manufacture

• Constraints o 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

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 o 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 o 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 o A fully-functional prototype that is:

• lighter

• cheaper

• easier to assemble and manufacture

• Constraints o 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

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 o 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: 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 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

operate 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?