p14031: jib transfer bench - edgeedge.rit.edu/edge/p14031/public/presentations...• adaptive...
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P14031: Jib Transfer Bench
Matt Brunelle
Nicole Conway
Mike Kennedy
Katy Wurman
Project Definition
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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
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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
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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
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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.
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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
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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
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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
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Stakeholders • Adaptive sailing
programs/centers
• Staff and volunteers
• Disabled sailors or
potential sailors
• RIT
• MSD team
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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
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Use of device
Stored under gangway
Installed in boat before
each use
Used in wet environment
Removed immediately after sailing
Taken out in pieces
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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
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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
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Project Schedule
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Potential Issues and Risks • Project Funding – lost NSF grant
• Have yet to interview the customer who used the
previous prototype
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Questions?