P13032 Adjustable Sailing Seat Timothy Slattery ME Andrey Sulik ME Derek Topper ME Marion Paredes Pages ISE May 10 2013 Project Overview Objective Redesign team P12031s Motion Assistive Seating Device for Sailing Keith Burhans ID: 764069
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P13032Adjustable Sailing Seat Timothy Slattery - ME Andrey Sulik - ME Derek Topper - ME Marion Paredes Pages – ISE May 10, 2013
Project Overview Objective: Redesign team P12031's Motion Assistive Seating Device for Sailing (Keith Burhans) Gold Medal Sailing Seat Motion Assistive Seating Device
Specifications Primary customer needs: Provide adjustability for multiple users Provide adjustability for other Sonar boats Increase safety Increase mechanical advantage Provide enough space for Jib Transfer Bench (P13031) Translated into engineering specifications
Engineering Specifications 1 = most important Engineering Specification # Importance* 1 Source Specification Unit of Measure Marginal Value Ideal Value ES1 1 CN1, CN11 Secure to Sonar with non-permanent attachments Binary Yes ES2 1 CN2 Adjustable Foot Rests in 4< ES3 1 CN3 Seat Adjustment (up/down) in 1< ES4 1 CN4 Hand Crank Adjustment in 4< ES5 1 CN5 Percentage Amplification of User Force Input % 3rev/ 90° Tiller 4rev/ 90° Tiller ES6 1 CN6 Corrosion resistance Binary Yes ES7 1 CN7 Seat locks into position anywhere in travel Binary Yes ES8 1 CN8 Cost of components manufactured for MSD $ 3000> ES9 1 CN9 Entire seating system is moved aft from previous iteration in 0< 3< ES10 1 CN10 Minimum FOS of critical elements found via analysis # 2≤ 3< ES11 1 CN13 Steps required to release rudder in emergency # 3> 1 ES12 1 CN14 Degree of movement of rudder from centerline of boat degrees 40< 90< ES13 1 CN14 Backlash in lines controlling rudder in 1> 0.5> ES14 2 CN22 Grab handle(s) to assist seat movement Binary Yes ES15 2 CN17 Time required to attach or detach hands s 30< 15< ES16 2 CN18 System has limited number of sharp corners or edges # 10> 0 ES17 2 CN19 Pinch points created by track platform # 2> 0 ES18 2 CN20 Steps required to release from harness # 3> 1 ES19 3 CN21 System fits multiple seats # 2≤ ES20 2 CN11, CN21 Time to fit system in SONAR sailboat minutes 60> 30> ES21 2 CN11, CN21 Time to adjust system for new user minutes 60> 30> ES22 2 CN24 Time to assemble system minutes 60> 30> ES23 1 CN3 Seat Adjusetment (fore/aft) in 3<
Design: First Steps Functional decomposition
Design: Concept Concept development iterations Two design proposals Redesigned trackless system Modified track system design (system constraints + customer preference) Primary improvement goals: Hand crank, seat position, and foot rest adjustability Reduced impact on body when swinging from side to side Mounting plate that can secure different seat shells Adjustable platform handle locks to lock in place in different Sonar boats Emergency quick-release system
Final System
Design: Adjustability Anthropometric analysis to determine amount of adjustability Accommodate about 90% of the population Adjustability:
Design Components Hand Crank
Design ComponentsPedestal Base
Design ComponentsTrack Platform
Test Results Engineering Specification # Importance* 1 Specification Unit of Measure Marginal Value Ideal Value Test Results ES1 1 Secure to Sonar with non-permanent attachments Binary Yes Yes ES2 1 Adjustable Foot Rests in 4< 4" ES3 1 Seat Adjustment (up/down) in 1< ~2.25" ES4 1 Hand Crank Adjustment in 4< 4" ES5 1 Percentage Amplification of User Force Input % 3rev/ 90° Tiller 4rev/ 90° Tiller 4rev/ 90° Tiller ES6 1 Corrosion resistance Binary Yes Yes ES7 1 Seat locks into position anywhere in travel Binary Yes Yes ES8 1 Cost of components manufactured for MSD $ 3000> ~3500 ES9 1 Entire seating system is moved aft from previous iteration in 0< 3< 3" ES10 1 Minimum FOS of critical elements found via analysis # 2≤ 3< 3 ES11 1 Steps required to release rudder in emergency # 3> 1 1 ES12 1 Degree of movement of rudder from centerline of boat degrees 40< 90< Specification Achieved Specification Not Yet Verified
Test Results Engineering Specification # Importance* 1 Specification Unit of Measure Marginal Value Ideal Value Test Results ES13 1 Backlash in lines controlling rudder in 1> 0.5> ES14 2 Grab handle(s) to assist seat movement Binary Yes Yes ES15 2 Time required to attach or detach hands s 30< 15< 0 sec. ES16 2 System has limited number of sharp corners or edges # 10> 0 ES17 2 Pinch points created by track platform # 2> 0 0 ES18 2 Steps required to release from harness # 3> 1 1 ES19 3 System fits multiple seats # 2≤ ES20 2 Time to fit system in SONAR sailboat minutes 60> 30> 15 min. ES21 2 Time to adjust system for new user minutes 60> 30> 30 min. ES22 2 Time to assemble system minutes 60> 30> 30 min. ES23 1 Seat Adjusetment (fore/aft) in 3< 2" Specification Achieved Specification Not Yet Verified
Success and FailureSystem provides full range of adjustability Foot rest angle (bonus!) System provides greater comfort to user Corbeau seat5 point harnessQuick release tillerSystem is expensiveSystem should be made more robustRemoval of wooden componentsFoot rests Many parts to manufacture
Final System
Future Work Provide adjustability for other popular sailing boats Ideal 18 Freedom 20 Increase system portability Provide ergonomic handcycling grips (30° tilt)Decrease total installation time
Questions?