Who We Are SUBC is a group of undergraduate engineering students from the University of British Columbia Team Goals –Design, build and test a human powered, flooded submarine –Promote UBC and UBC student teams –Race at the 11th International Submarine Race in Bethesda Maryland

Design Philosophy A Low key environment, with members who are there to learn and build, while having fun Keep as much design and manufacturing in house as possible Have reasoning behind every design decision 3

How to get there 4 DesignBuildTestRefine

Project Phases There are 4 key phases to the project –Preliminary Preparations Goal setting, Fundraising, Certification –Design NACA Aerofoil, Wind tunnels, Modeling –Manufacture Fiber-glass lay-up, system manufacturing, Aesthetics, Safety, Ergonomics –Execution Planning for race day, Pilot preparation, Organization and communication

Gearbox The gearbox was inherited from a previous Capstone Design Project Bushings were chosen for their corrosion resistance Gear set-up enables counter-rotating propellers

Hull Design 2D Approximations –NACA data 3D CFD Analysis –RANS simulations of 5 submarine hulls Residuals Force Plot

CFD Done At STX Marine –Four designs were tested –Rotated Cross section of NACA 6 series Foils Hull Design

Hull Manufacturing -Perform an analysis of pro/cons of each method -Assign a weighted value to each pro/con -Decide on a process using weighted decision matrix, past team advice & industry -Optimize!! -Begin manufacturing Cut Profile Use profile to Hot- wire cut a plug Deliver CAD files to CNC cutter to develop a smooth Plug Outsource Lay-up procedure to a Professional Cut Profile Form a sheet of plastic by heating and inflating it Outsource Plastic Mold for Lay-up Dry, Paint, and Install Epoxy, resin and fiberglass a smooth female mold over plug Hand Lay Fiber- glass and composites Dry, Paint, and Install Dry paint and Install Develop Shape COST TIME CONSUMPTION FINISHING QUALITY -Kevlar/Carbon Body with Ribs and stiffeners -2 piece design

Fin Design Building on – airfoil research –Submarine control research –Low Aspect Ratio wing/fin research –CFD analysis, in cooperation with CD-Adapco

Fins Used Windsurfing fins modified for submarine use Impact resistant Plastic Fit with our teams time constraints Initial sizing estimates used for fin sizing 11

Ergonomics and Life Support Optimizing the “human factor” Getting the most power out of our pilot as possible Ensuring pilot and diver safety

Safety Requirements 13 Safety Life Support Primary Air Secondary Air Diver Air System Safety Colour Egress Restraints VisibilityBuoyStrobe

Ergonomics Area around pilot Hatch egresses Handlebars/ steering 14

Testing Two Separate Pool times Effective for learning what worked and what didn’t Had free movement at end of second session 15

Budget Kept costs low through in kind sponsorship and in house manufacturing Use resources effectively 16

The Complete Submarine Systems that work together Safe and effective Redundancy Speed

Questions Thanks to Our Sponsors Visit us at blogs.ubc.ca/subc/ or Drop by here at ISR #11!