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Skyracks

Skyracks. Sam Bennett Arbaaz Khan. Agenda. Team roles P roblem statement Research Market Research Survey Designs Prototype Testing Data Refinements Final Solution Conclusion. Team roles. LEADER. Samantha. Arbaaz. SCRIBE. TIME KEEPER. Problem Statement.

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Skyracks

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  1. Skyracks Sam Bennett Arbaaz Khan

  2. Agenda • Team roles • Problem statement • Research • Market Research • Survey • Designs • Prototype • Testing • Data • Refinements • Final Solution • Conclusion

  3. Team roles LEADER Samantha Arbaaz SCRIBE TIME KEEPER

  4. Problem Statement • Due to the poor distribution of weight across the body by traditional two strap backpacks, over twenty million American middle and high school students exceed the recommended amount of stress (15% of their body weight) placed on their shoulders, neck, and lower back resulting in pain, distortion of the natural "S" curve of the spine, and poor posture. According to a study performed in May of 2002 to May of 2003 by the Consumer Product Safety Commission, an estimated 21,000 children were admitted to an emergency room from backpack related injuries.

  5. Statement of Purpose • Reduce the negative impact on posture and pain felt by students while wearing a backpack.

  6. Why is this a problem? • A survey conducted by The American Academy of Orthopedic Surgeons of 101 doctors showed: • 70% of doctors believe backpacks are a clinical problem for children. • 58% of doctor’s surveyed have seen school-age patients complaining of back and shoulder pain from heavy backpacks. • “In my own practice, I have noticed a marked increase in the number of young children who are complaining about back, neck and shoulder pain,” -Dr. Scott Bautch, a member of the ACA's Council on Occupational Health. • Retrieved from: http://www.chiro.org/LINKS/FULL/AAOS_tells_media.shtml

  7. TimeLine

  8. Market Research • Backpack Market: • Total available market 4,093,750 people • Sales on backpacks: • Main geography of customers: America • Buyers: • Parents • Users: • Students • Year in school range: Grade 8 - College level

  9. Existing Competitors North Face Women’s Jester Backpacks Jansport Right Pack Wool Nike Cheyenne 2000 Classic

  10. Performance Benchmarks • Fully functional and usable as a backpack • Can hold at least 45 lbs • Puts less stress on body than traditional two strap backpack

  11. What problems do you currently experience with backpacks? (Taken from our online surveys) • “Too heavy to lift, hard to put on, and feels way to heavy on back.” • “Pain in my shoulders.” • “Textbooks are too heavy to carry on the shoulders/back.” • “The weight I carry is too heavy and it hurts my back/shoulders.” • “Painful straps or too little space”

  12. INITIAL VESTPACK Sketches

  13. X-PACK

  14. ZIPPERPACK

  15. CAD Drawings

  16. CAD Drawings

  17. Decision Matrix

  18. Build process • Straps • Cut blocks of polyurethane into strips 4“ wide • Cut 2 (of the 4) 22’’ strips in half • Trim one end of halved strips off by a 45˚ angle • Vest • Cut out dimensioned strips of fabric • Use sewing machine attach pieces together • Sew in compartments (strips of fabric) to hold straps • Attach straps in appropriate places (hips, down the shoulders, and across the middle of the torso)

  19. Cut off straps on premade backpack • Sew the pack of the premade backpack to vest • Sew zipper on to front of vest • Insert padding in between pack and vest

  20. First prototype

  21. Testing • Weight distribution • Vernier Dual-range Force Sensor • Strap effectiveness • Vernier Dual-range Force Sensor • Ease of zipping up • Able to fit in locker

  22. Weight Distribution Test • Test to compare traditional two strap to Vestpack • Measured: • Right & Left Shoulder strap • Weighted &Not weighted • With & with out padding

  23. Right shoulder Comparison Two Strap Backpack Vest-Pack

  24. Left Shoulder Comparison Two strap backpack Vest-pack

  25. Strap Effectiveness Test • Measured: • Right & Left Shoulder straps • Right & Left Middle straps • Right & Left Hip straps • Weighted &Not weighted • With & with out padding

  26. DATA: Strap Effectiveness TestBack (Weighted) PAD AVERAGE FORCE: 5.432 N NO PAD AVERAGE FORCE: 8.817 N

  27. DataStrap Effectiveness TestBack (Not weighted) NO PAD AVERAGE FORCE: 3.365 N PAD AVERAGE FORCE: 2.360 N

  28. DataStrap Effectiveness TestRight Shoulder (Not weighted) PAD AVERAGE FORCE: 5.201N NO PAD AVERAGE FORCE: 5.458 N

  29. DataStrap Effectiveness TestRight Shoulder (Weighted) PAD AVERAGE FORCE: 10.09 N NO PAD AVERAGE FORCE: 18.89 N

  30. DataStrap Effectiveness TestLeft Shoulder (Not weighted) PAD AVERAGE FORCE: 6.194 N NO PAD AVERAGE FORCE: 7.779 N

  31. DataStrap Effectiveness TestLeft Shoulder (Weighted) PAD AVERAGE FORCE: 14.48 N NO PAD AVERAGE FORCE: 21.81 N

  32. Results • Vestpack did relieve force/stress on shoulders compared to traditional backpack

  33. Refinements

  34. Final Prototype

  35. Summary • Goal: Reduce stress by students from wearing heavy backpacks • Survey justification • Designs • First prototype  Refine  Final prototype

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