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

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How to get there

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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

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

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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

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Ergonomics

• Area around pilot• Hatch egresses• Handlebars/ steering

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Testing

• Two Separate Pool times• Effective for learning what worked and

what didn’t• Had free movement at end of second

session

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Budget

• Kept costs low through in kind sponsorship and in house manufacturing

• Use resources effectively

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The Complete Submarine

• Systems that work together

• Safe and effective

• Redundancy

• Speed

QuestionsThanks to Our Sponsors

Visit us at blogs.ubc.ca/subc/

or

Drop by here at ISR #11!