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Sail Away

Sail Away. Members: Scott Donahoe Mike Lanteigne Wallace Barkhouse Blair MacKay. Supervisor Jimmy Chuang. Group #11. Content. Motivation and Competition 2) Design Steering Mast Sail Pontoons. 3) Testing and Experiments. Motivation.

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Sail Away

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  1. Sail Away Members: Scott Donahoe Mike Lanteigne Wallace Barkhouse Blair MacKay Supervisor Jimmy Chuang Group #11

  2. Content Motivation and Competition 2) Design Steering Mast Sail Pontoons 3) Testing and Experiments

  3. Motivation Retrieved from: “Sweet Clip Art” and “Clip art Graphics” Enjoyment of outdoors, kayaking and recreational activity Renewable energy Innovative idea Interesting project involving many mechanical aspects that the group will enjoy designing, building and finally testing

  4. Competition Retrieved from: “Triak Sports” COMPARISON CRITERIA Cost Versatility 3) Compatibility 4) Strength

  5. Safety

  6. Constraints • Easy transportation • Raise and lower mast • Materials corrosion resistant Criteria and Constraints Criteria: • Safety • Operate in seas-state three • Withstand 20 knot winds • Steering Mechanism • Buoyant if flipped Retrieved from: “Observed Winds” Retrieved from: “Pelletier”

  7. Flow Chart Fixed Mast PVC Pipe Mast Removable - Hinged Mast Mast Mast Aluminum Removable Slide on Mast Fiberglass Keel Rudder Wood Rudder Rudder Rudder Rudder / Keel Rudder Wood/Fiberglass Sail Away Sail Away Plastic Rear Mounted Rudder Fixed Mast Nylon Sail Curved Sail Sail Sail Sail Canvas Removable Slide on Mast Pontoon Aluminum Dual Pontoon / Single Support Fiberglass Stability Stability Dual Pontoon / Support Stability PVC Support Aluminum Double Keel

  8. Rudder and Keel

  9. Mast Design Removable Hinged Mast: Can be lowered and raised while sitting in kayak 3 1 2  

  10. Weld Stress Mast Calculations • Approximated as a square beam: • Weld stress too high to support mast • Ribs will have to be installed • Finite element analysis to be done with ribs Tube Stress • Limited by bending load: • 2 inch outer diameter • ¼ inch wall thickness • Stress = 43 MPa • Max Yield = 55 MPa

  11. Mast Mounting Connecting Bolts • Bottom Hinge Mounted to Kayak: • Bottom hinge plate mates to aluminum plate • Aluminum plate mates to epoxy layer • Epoxy layer mates to kayak • Aluminum plate inside kayak • Bolts run through whole assembly • There may be an epoxy layer inside kayak to protect kayak frame Bottom Hinge Bracket Exterior Mounting Plate Epoxy Layer Interior Mounting Plate

  12. Sail Design • Hinge Mounted to Kayak: • Custom made • 8 feet by 4 feet • 12 total attachment points • -10 along mast • -2 along boom • Mast attachment points are not rigid and slide with sail. (Similar to shower curtain rings) • Top mast attachment is a rope to pulley, rigged to the deck near user

  13. 1.4222m The Bernoulli equation modified to suit our flow scenario is given as Using a wind speed of 30 knots (SF 1.5) the expected pressure acting on our sail: = 153.63 Pa Assuming that we have a uniform pressure distribution, the pressure on the sail can be treated as a point load at the sails centroid. = 228N Wind Load Calculations x

  14. The objective of the this experiment was to determine the moment required to tip our loaded kayak. Moment Experiment • A weight was applied a distance of 1 meter from the center of the kayak • The kayak would lean as weights were added

  15. Moment Results Retrieved from: “Desktop Wallpapers”, “Trendy Pictures”, “Free Clip Art” Max Moment = 44.5 Nm acting on sail Pontoons Needed !!!

  16. 1.4222 m Counteract Tipping Moment Using our point load found earlier and the geometry of our design the net buoyancy force needed to prevent tipping is 222 N - Pontoon Sizing 1.492 m

  17. Pontoon Support Design • A Dual pontoon dual support system was to stabilize the kayak • This would allow the user to paddle and still maintain the center of gravity • Four foot spacing was calculated using the paddle length and angle of paddle 4’ 4’ Kayak 4’ = horizontal length = vertical length = paddle length (8’) = paddle angle (30) 2* 4’ x y

  18. Support Attachment • The support is made of strapping welded to aluminum tubes on either side • Each support will be attached to the kayak with four bolts and collars • The support will be attached to the pontoons with modified C-clamps

  19. Nylon Sail Cable to Lower mast Aluminum Mast Plastic Rudder Aluminum Support Fiberglass Pontoons Bracket to Lower Mast

  20. The kayak was loaded with different weights to determine how much weight the kayak could hold Weight Experiment • The ultimate goal was to find the max weight the kayak could hold • The weight added would mimic the material that would have to be added • The weights were also distributed along the kayak

  21. Max Water Line 315 Pounds 315 Pounds 230 Pounds 175 Pounds Unloaded

  22. The speed of the kayak was tested when loaded with the extra weight (55 Pounds) and unloaded. Results and Conclusion The kayak was faster when it was not loaded with the extra weight. The loaded kayak was 17% slower The decrease in speed was significant, but was expected because of the added weight The actual decrease in speed will be different because of the drag of the keel. Speed Experiment

  23. Further Considerations • Stress Analysis: • Finite element analysis should be done for all load bearing components • Bottom of mast is weakest and therefore most important • Falling mast is dangerous to user

  24. Budget

  25. References Seda - Rudder Options. N.d. Photograph. Seda- Strength, Speed, Spirit, Ensenada el Pescador, Baja Mexico. Web. 20 Nov 2011. <http://www.sedakayak.com/sea_kayaks/rudders.html>. The triak - about the boat. . (n.d.). Retrieved from http://www.triaksports.com/ Black Sailboat Silhouette. N.d. Photograph. Sweet Clip ArtWeb. 4 Dec 2011. <http://www.sweetclipart.com/black-sailboat-silhouette-61>Free Kayak Clipart. N.d. Free Kayak Clipart. N.d. Photograph. Free Clipart GrpahicsWeb. 4 Dec 2011. <http://www.freeclipartnow.com/recreation/boating/kayak.jpg.html>. Wave Desktop Wallpapers. N.d. Photograph. Desktop WallpapersWeb. 4 Dec 2011. <http://www.fwallpaper.net/wave-16.html>. Picture of Arrow. N.d. Photograph. Trendy PicturesWeb. 4 Dec 2011. <http://trendypicture.com/red- arrow/15251/arrow-20red-203d-jpg.html>. Wind Clip Art. N.d. Photograph. Free Clip ArtWeb. 4 Dec 2011. <http://95.143.192.212/nature/weather/wind/index.html>. Observed Winds. N.d. Photograph. Univeristy of IllinoisWeb. 4 Dec 2011. <http://ww2010.atmos.uiuc.edu/(Gh)/guides/maps/sfcobs/wnd.rxml>. Tammy Pelletier. When Do Ocean Waves Become 'Significant'? A Closer Look at Wave Forecasts . N.d. Photograph. Mariners Weather LogWeb. 4 Dec 2011. <http://www.vos.noaa.gov

  26. Thank You Shell

  27. Questions?

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