Project Readiness Package Rev 7/22/11

ADMINISTRATIVE INFORMATION:

 Project Name (tentative): Jib Transfer Bench

 Project Number, if known: P13031

 Preferred Start/End Quarter in Senior Design: Fall/Winter Fall/Spring Winter/Spring

 Faculty Champion:

Name Dept. Email Phone Dr. DeBartolo ME [email protected]

 Other Support

Name Dept. Email Phone Prof. Kate Liepold ME [email protected]

 Project “Guide” Unknown

 Primary Customers (name, phone, email): Cindy Walker, [email protected], (781) 789-5932 Zak Kordik, [email protected], (773) 469-6707 Gary Pierce, [email protected] , (219) 364-6470

 Stakeholders: - Richard Ramos, [email protected] - Magnus Liljedahl, [email protected] - Peter Goldman, [email protected]

 Sponsor(s): (provider(s) of financial support)

Name/Organization Contact Info. Type & Amount of Support Committed RIT TBD NSF [email protected] RAPD grant

Interest in continuing (not interested) 0------1------2------3------4------5 (very interested) I have already established contact with the customers associated with this project. I am capable of doing the needed ergonomics analysis corresponding to designing the product. I feel the background on the subject that I have acquired in the last 10 weeks will aid the progress of the project.

Page 1 of 13 Project Readiness Package Rev 7/22/11

PROJECT OVERVIEW: Last year a team of engineers from RIT worked with Keith Burhan and Richard Ramos to incorporate Keith’s design for a swiveling captain’s chair into Richard’s boat. Richard is a C 4-5 quadriplegic so the design incorporated a chair that could hold him securely and a bicycle adaptation for his hands so that he could steer the boat from the chair. The person crewing with Richard responsible for trimming the Jib sail, Cindy Walker, has limited use of their legs. Team Paradise, a disabled sailing club, has implemented a Jib transfer bench for paraplegics in one of their sail boats. They have a design for a marine plywood and carbon fiber system capable of providing the support needed to accommodate a paraplegic athlete. This design has potential to be reengineered so that it’s easier to manufacture and less costly. Peter Goldman has shown an interest in implementing a Jib transfer bench such as this in a boat for his sailing club as well. Both boats considered for implementation of this transfer bench are Sonars. To trim the jib sail they need to get from the left to the right side of the boat. Because the athletes have limited to no leg or core strength they need to use their arms to move themselves. The distance between the seats on either side of the boat is too great to span without considerable arm strength, so currently the person must travel from one seat, to the floor, and back up onto the other seat. This devise should make it easier for the athletes to get from one side to the other. By easier I mean it should take less force and less time to make the transition.

Primary boat of interest: Sonar

Page 2 of 13 Project Readiness Package Rev 7/22/11

DETAILED PROJECT DESCRIPTION:  Customer Needs and Objectives: (1=highest priority) Customer Importance Description Need # Make it easier (require less force) for the jib trimmer to get from port to CN1 1 starboard Make it take less time for the jib trimmer to get from port to starboard given CN2 2 they have no use of their legs and limited to no core strength CN3 1 light weight CN4 3 eliminate the need for the person to make contact with the "floor" of the boat CN5 1 Provide access to jib lines CN6 2 Mechanical solution CN7 1 easy to use CN8 1 provide support for legs and core CN9 1 Easy to install CN10 1 Adjustable to different boats CN11 1 Move between port and starboard CN12 1 Corrosion resistant

 Functional Decomposition:

operate jib lines at points A and B on boat X

Move person Accomodate Hold bench Adjust system to Provide support between points User stationary boat x to person A and B

maintain release at point accept person position at point support legs A A

maintain release at point secure person position at point support core B B

release person

Page 3 of 13 Project Readiness Package Rev 7/22/11

 Specifications

Page 4 of 13 Project Readiness Package Rev 7/22/11

 Constraints: - Can not hinder the ability of the sailor to operate the Jib lines due to positioning or introduction of barriers.

- Must remain within budget

- Minimize support components requiring alteration of the boat itself

STUDENT STAFFING:

 Skills Checklist:

Appendix (PRP): Skills Checklist

Project Name (tentative): Jib Transfer Bench Nicholas J Davis Checklist Completed by (name):

For each discipline, indicate which skills or knowledge will be needed by students working on the associated project, and rank the skills in order of importance (1=highest priority). You may use the same number multiple times to indicate equal rank.

Mechanical Engineering

2 3D CAD Aerodynamics MATLAB programming CFD 1 Machining (basic) Biomaterials Stress analysis (2D) Vibrations 1 Statics/dynamic analysis (2D) Combustion engines Thermodynamics GD&T (geometric dimensioning & tolerancing) Fluid dynamics (CV) Linear controls LabView (data acquisition, etc.) Composites Statistics DFM Robotics (motion control) 1 FEA Composites Heat transfer Other: Modeling of electromechanical & fluid Other: systems 1 Fatigue & static failure criteria (DME) Other: 1 Specifying machine elements

Reviewed by (ME faculty):

Page 5 of 13 Project Readiness Package Rev 7/22/11

Industrial & Systems Engineering

Statistical analysis of data – regression Shop floor IE – methods, time study Materials science Programming (C++) Materials processing – machining lab Facilities planning – layout, material handling 2 DOE Production systems design – lean, process Systems design – product/process improvement design 1 Ergonomics – interface of people & equipment Data analysis, data mining (procedures, training, maintenance) Math modeling – linear programming), Manufacturing engr. simulation Project management 3 DFx -- Manuf., environment, sustainability Engineering economy – ROI Other: Quality tools – SPC Other: Production control – scheduling Other:

Reviewed by (ISE faculty):

 Anticipated Staffing Levels by Discipline:

How Discipline Anticipated Skills Needed (concise descriptions) Many? EE 0

ME 2-3 Statics and dynamics analysis, Machining capability, CAD modeling

CE 0

ISE 1 Ergonomics and Human Factors

Other 0

Page 6 of 13 Project Readiness Package Rev 7/22/11

OTHER RESOURCES ANTICIPATED: Describe resources needed to support successful development, implementation, and utilization of the project. This could include specific faculty expertise, laboratory space and equipment, outside services, customer facilities, etc. Indicate if resources are available, to your knowledge.

Resource Category Description Available? Faculty

Environment

Equipment Machining equipment

Materials Composite materials

Other

Prepared by: Nicholas J Davis Date:

Page 7 of 13 Project Readiness Package Rev 7/22/11

 Potential Concepts: Have the chair on a monorail track to transfer it from one side to the other. The Monorail would span the gap between the benches on either side of the sonar. Incorporate a pivot point underneath the seat so that it can swivel 180 degrees to maintain the correct orientation on either side of boat. Use a pulley system with v cleats to move the chair from side to side and lock it into position respectively. A half-moon shaped rail could be incorporated rather than a straight rail if it provided better positioning of the operator.

Magnus Liljedahl from Team Paradise has a swiveling lazy Susan design. This puts the point of rotation in the center of the floor. There is a lever arm that goes out from the lazy susan at an angle to avoid contact with the bench seats in the boat. The lever arm is designed to put the seat on, therefore it holds the weight of the person and the seat. There is molded leg support on top of the lazy susan, infront of the lever arm. Straps hold the persons legs in place. Both the seat attached, and the leg support, are made of molded carbon fiber. A harness can be incorporated in the seat to provide additional core support. Original design would need modification for incorporation in boats other than a Sonar.

Page 8 of 13 Project Readiness Package Rev 7/22/11

 Benchmarks:

Lazy Susan design Eagle Health XX Pivoting bath bench Long Toilet to Tub Transfer Bench

Weight capacity Proven approx. 200 lbs 350 lbs 400 lbs Max transfer Approx. 50” 34” 15” distance Weight of device Approx. 40 lbs Light-approx. 20 lbs 17.5 lbs material Plywood/fiberglass/carbon Aluminum/Plastic Aluminum/Plastic fiber Product foot print 600 sqr in 1430 sqr in 722 sqr in http://eagletransferbench.blogspot.com/ http://www.dynamic-living.com/product/portable-pivoting-transfer-benches#name_tabsHref+clear

 Engineering analysis:

Areas to apply Analysis:

- Points of failure in developed device (Stress/Strain) - Wear analysis (fatigue) - Gear analysis/pulley analysis (mechanical advantage)

- Material analysis (anti corrosive) Aluminum, carbon fiber, marine plywood, pressure treated wood and fiber boards, galvanized steel all are corrosive resistant. Additional material properties such as the strength to weight ratio will need to be considered in designing the chair. Consider thermoforming plastics, and fiberglass with Kevlar inserts as well.

- Weight considerations - Cost considerations - Max/min speed to move across the boat - Force required to start the persons movement (inertia) - Width of the boat (or max distance traveled) - Estimated or desired life - Max time allowed to install/remove - Max time allowed secure/release person.

Primary concerns: Cost

3 3 ∑all materials[(Cost per in )(in of material)] <= budget

For Richards chair design the cost for PEDESTAL BASE SUBCOMPONENT PARTS, TRACK PLATFORM SUBCOMPONENT PARTS, and the PASSENGER INTERFACE SUBCOMPONENT PARTS that would be translatable came to $1685.58

Page 9 of 13 Project Readiness Package Rev 7/22/11

Weight

Wanted weight is determined by waterline of boat. This is variable depending on the weight of the crew and the boat of interest.

3 ∑all materials[(ρ)(in of material)]

There is no suggested weight for the crew of a Sonar sailboat. This being said the device should be as light as possible because additional weight can always be added. Also a light device will be more adaptable if used in other boats.

Needed adjustability of transfer range

(Width at front of cabin area for the largest 3 man sail boat) – (width at front of cabin area for the smallest 3 man sail boat)

The distance between the back of the benches on the port and the starboard would have to be measured for various boats such as the Sonar, Skud 18, Catalina 22, and Martin 16. These are not readily available dimensions so going to a boat yard would be needed.

Force needed to begin motion Assuming movement is in a single direction on a flat surface the force needed to begin movement would be equal to the force of friction.

The 95% male is 265 lbs or 120.2 kg N= = 120.2 * 9.8 = 1177.96N

= Force needed Assuming the material used is Teflon on steel or there is some roller system the coefficient of friction would be less than 0.1 so I will use 0.1 get an estimate for an upper bound.

Page 10 of 13 Project Readiness Package Rev 7/22/11

If you include an angle the force is increased.

Again assuming the material used is Teflon on steel or there is some roller system the coefficient of friction would be less than 0.1 so I will use 0.1 get an estimate for an upper bound if you are using an angle of 15 degrees.

This force is subject to the coefficient of static friction and the angle of the boat. If the distance was gapped with something other than a flat surface, such as a transfer bench, the weight of the device would need to be incorporated.

Holding Force needed at port and starboard. If a holding device needs to be used to keep the person on one side of the boat this would apply: If the boat were on its side the equation would be simple

Considering it most likely will never be completely sideways a more accurate model would be

Assuming a 95% male, 45 degree angle and a weight of 2.5 kg

Target time for the transfer from port to starboard http://www.youtube.com/watch?NR=1&feature=endscreen&v=FLzWUF1TNtI At 1:02 you can see the amount of time that it takes for Olympic sailors to transition from one side to the other. This is what should be emulated.

Target time should be around 3 seconds.

Target time to getting a person into the seat/out of the seat http://www.youtube.com/watch?v=rgmeLLlmk-w http://www.youtube.com/watch?feature=endscreen&NR=1&v=ImvgZ4rkufQ from 1:40 to 3:20 movement is taking place. Additional time has to be added to account for getting a person into the harness initially. So that 1:40 plus around 40 seconds to a minute to get them in the harness initially. On the high end it would take around 2:40 to accomplish this task

Page 11 of 13 Project Readiness Package Rev 7/22/11

Target time for installation or removal Assumptions: the unit can be lifted and put into the boat in a single piece. A series of spring loaded pins are used (like the mounting pins for a fisher snow plow) in four locations going into prefabricated holes. It could be done in around 2-3 min. If you were to use conventional threaded bolts it would take much longer. Probably around a minute per bolt plus at least a min to lift the seat and put it into place would put you around 5-6 min. The target should be around 3 min to set the bar high.

Page 12 of 13 Project Readiness Package Rev 7/22/11

Note: seek assistance from Prof. Lundgren as well

Page 13 of 13