156B Week 9

Accomplishments from Previous Week

● Field tested “side zipper” and “back zipper” prototype (Jordan)

○ Contortion of rubber layer felt negligible once in the water

○ Removable sole felt a bit slippery to walk on

● Fixed sizing issue with “side zipper” prototype (Ho)

● Field tested fixed prototype (Jordan / Garrett)

● Began puncture testing most recent prototype (Miles)

Goals for Next Week

● Brainstorming quick solution to keep sand out (Jordan)

○ Sew sole into a pocket of neoprene instead of gluing sole down

● Finishing touches on design (entire team)

● 3D print hexagons and turn into soles (Garrett)

● Produce final prototype/deliverable (Ho)

● Refine cost estimate (Jordan)

● Puncture test final deliverable (Garrett / Miles)

● Stomp test final (Garrett / Miles)

● Field test final (Jordan)

Sponsor Comments

● Randy is confident that hot glue will be fine in the ocean, especially if it works in saltwater tanks.

● The sponsors would like to look into industrial hot glue guns and hot glue sticks. They want to hear all of our ideas, even if they go beyond the scope of our project.

● Could try to find rubber already formed in the shape of a saddle point for more flexibility

○Ask Darren about curing rubber

● Could try overlapping multiple layers of rubber

● Ask a cobbler both about price and time to produce

Instructor Feedback

● Look up chemical compatibility of hot glue and salt water using a similar material

○ Use Dow/Dupont

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

● Good testing gifs

● Good presentation of testing procedure

● Great presentation and slides

● testing slides very clear and helpful

Risks and Areas of Concern

● Durability testing

● Sand gets stuck between sole and neoprene even if the sole is glued down

● Drag reduction

● Sizing issues

○ Wrapping around ankle

○ Zipping up all the way

Budget

● Purchased more shoe glue

● Previous amount spent: $339.93

● New amount spent: $346.38

● Remaining budget: $653.62

Progress on Report and Webpage