The Gator Engineering Design 100 019 Team 8

The Gator Engineering Design 100 -019 Team 8: Division by Zero Jasmine Ferrence, William Torris, Shayla Benson, Xiaoyin Hu February 28, 2018

Table of Contents Derivation of Specifications Brainstorming Evaluation of Ideas Analysis of Design Adjustments Following Prototype Testing Questions?

Our mission is to create a marketable device that allows its user to successfully be able to walk on water.

Derivation of Specifications

Our target consumer is 18 -25 years old. Fig. 1. Age of Respondents Interested In A Device

We wish to keep the pricepoint of our device at $80. Fig. 2. Price Point Garnered from Survey 1 Fig. 3. Price Point Garnered From Survey 2

Our device will support weights between 100 and 200 pounds. Fig. 4. Weight of Interested Consumers

Design specifications were derived from surveys and interviews conducted with consumers. Stakeholder Needs and Wants Specifications Cost to make The cost to make the device must be below $65 Weight it can hold The device must be able to support a minimum of 100 pounds and a maximum of 200 pounds Durability The device must still be usable after 10 drops from a height of 5 feet Stability The device is stable enough to climb on while already in the water Appearance When asked to choose the “best looking device”, at least 51% of those surveyed must choose ours Price The $80 price point of the device on the market should equate in a profit for the group Portability The device must be able to be transported from Pollock to the Natatorium by foot Eco-friendly The device must either be made from recycled materials or be recyclable Safety Each foot can be released from the device in under 2 seconds. A life vest and swimming knowledge will be strongly recommended Fun The device must allow the user to walk on water Table 1. Design Specifications

Brainstorming

Our group came up with 5 brainstorming ideas. Fig. 5. Brainstorm A Fig. 6. Brainstorm B

Our group came up with 5 brainstorming ideas. Fig. 7. Brainstorm C Fig. 8. Brainstorm D

Our group came up with 5 brainstorming ideas. Fig. 9. Brainstorm E

Evaluation of Ideas

The process of Concept Screening allowed us to narrow down ideas by combining weaker concepts. Table 2. Concept Screening

After concept scoring, we decided that the best device was a combination of ideas A, C, and E. Table 3. Concept Scoring

Analysis of Design

By creating 3 sizes of an otherwise identical device, we improve comfort & satisfy weight specifications. Table 4. Calculations for Small Device Table 5. Calculations for Medium Device Table 6. Calculations for Large Device

Each subsystem and component was taken into account to create our system.

Our device cost $56. 23 to produce, keeping us within our $65 budget. Bill of Materials Item Quantity Unit Price Total Cost Styrofoam (4’x 8’x 2”) 1 $33. 88 Duct Tape 2 $2. 97 $5. 94 Plastic Dowel 8 $1. 49 $11. 92 Waterproof Cord 1 $4. 49 Total 12 $42. 83 $56. 23 Table 7. Bill of Materials

Our prototype design was a combination of ideas and stayed within our budget. Fig. 10. Prototype Hand Sketch Fig. 11. Prototype

Prototype Testing

Adjustments Following Prototype Testing

We created wings out of the bottom tier to increase stability on our final design. Fig. 12. Final Design Hand Sketch Fig. 13. Final Design CAD Sketch

We also added a string between the devices to keep them from drifting apart while on water. Fig. 14. Final Design

Final Test

Table 8. Gantt Chart (Part 1) Gantt Chart

Table 9. Gantt Chart (Part 2) Gantt Chart

Questions?

Densities of Common Materials. (n. d. ). Retrieved February 23, 2018, from https: //www. engineeringtoolbox. com/density-materials-d_1652. html Google Forms [Computer software]. (n. d. ). Retrieved January 29, 2018, from https: //docs. google. com/forms/d/15 n. IABJYYmx. Juw. P 8 Cqth. Ub. E 5 RSxt. Ioh 19 e. Q 73 gn. J_c 0/edit Used to create Survey 1 Konkel, L. (2010, June 10). How do Animals Walk on Water? Retrieved February 23, 2018, from https: //www. livescience. com/32639 -how-do-animalswalk-on-water. html Microsoft Project [Computer software]. (n. d. ). Retrieved February 23, 2018. Used to create Gantt Chart Rules & Regulations. (2015). Retrieved February 23, 2018, from http: //studentaffairs. psu. edu/campusrec/nat/rules. asp Solid. Works [Computer software]. (n. d. ). Retrieved February 20, 2018. Stability in Flotation. (2018). Retrieved February 23, 2018, from https: //sciencedemonstrations. fas. harvard. edu/presentations/stability-flotation Staff, A. (2005, December 1). Walking on Water. Retrieved February 23, 2018, from https: //indianapublicmedia. org/amomentofscience/walking-on-water/ Survey. Monkey [Computer software]. (n. d. ). Retrieved January 29, 2018, from https: //www. surveymonkey. com/dashboard/ Used to create Survey 2 What is buoyant force? (2018). Retrieved February 23, 2018, from https: //www. khanacademy. org/science/physics/fluids/buoyant-force-and-archimedesprinciple/a/buoyant-force-and-archimedes-principle-article References

Appendix

Definitions PROBLEM STATEMENT: Millennials want to have fun walking on water by using a low-cost, portable, safe device that will last multiple seasons. Walking ● Moving at a slow, regular pace while keeping at least one foot on the medium at all times and moving in the desired direction. ● Average walking speed is 3. 1 mph Water ● A liquid made of at least 95% H 2 O and is still: experiences little to no movement Definition of walking on Water: ● The ability to keep a human’s body, above the ankle, out of the water, and inch in a specific direction either through small strides, shuffling, or bounds, in a stable manner.

Survey 1 Questions

Survey 2 Questions

Specific Survey Results 54. 7% of those surveyed were interested in purchasing a device were between the ages of 18 -25 46. 7% of our customers are willing to pay more than $75 for a device, so we determined that $80 was a good price point to balance interest and profit. 76. 5% of those interested in purchasing the device weigh between 100 and 200 pounds 76. 4% of those interested would use the device for recreation, others would use it for pool cleaning 94% of those interested would use the device for a maximum of 1 hour

Interview Questions 1. 2. 3. 4. 5. 6. Would you purchase a device? What would you use the device for? Where would you use the device? You would purchase it for a friend/family member/other? How are you going to transport the device? How durable does it have to be to meet your needs? a. Using for only a Season? b. How many years for this one device? 7. Safety implications? Lifejacket? 8. Any other comments or concerns about the product?

Pairwise Comparison