1. University of Florida “Swamp Thing” 9th International Submarine Races

2. Introduction Interdisciplinary Team ME, AE, EE Team LeadersRyan K. Jones Jonathon Jeske CaptainsDrive Chad Hodgkins Hull Jonathon Jeske Controls Charlie Shupard Propeller Joey Windle DriverCharlie Shupard Safety DiversRaphael Diaz Nic Fischer Ryan D. Jarrett ChefBrandon Crone

3. Overview | Goals Obstacles Time constraint Funding Construction location No precedence Goals Bring UF back to this competition Allow this program to continue Gain design engineering experience Abide by ISR standards

4. Design Philosophy Keep it simple Minimal machine availability Machining takes time Less moving parts Hydrodynamic Only the necessary area for driver clearance Smooth mold Minimal drag Maneuverability Ergonomically driver friendly Ability to adjust abrupt movements Appropriately sensitive

5. Design | Fabrication Hull Ellipsoid shape Transom rear and bull nose Largest diameter at pedaling motion Plug mold No wasted fiberglass Can be made fairly smooth Shell materials Fiberglass, bondoglass, bondo putty Protective Coating Epoxy primer base Acrylic enamel paint

6. Design | Fabrication Drivetrain Chain and Pedal Assembly Similar to a bicycle Reinforced Parts Stronger crank arms and drive gear More support for the frame assembly 90° Transmission Allows an easy connection Adjustable final gear ratio Driveshaft Solid aluminum Press fit

7. Design | Fabrication Propeller Single propeller Three blade assembly Hub Interchangeable parts Sturdy assembly Blades Optimizated using CAD program Reusable mold Fiberglass cloth construction High aspect Weight vs. Strength Variable pitch Driver-controlled

8. Design | Fabrication Controls Control Surfaces Two externally adjustable bow planes Two rear rudder planes Two rear elevators Balsa Wood Structure Fiberglass cloth exterior Resin coated interior Pushrod Controllers For each control (rudder, depth) PVC rod through PVC sleeve Tie rod connectors C-bend in pivoting PVC loops Removable Fins Bow planes held in by one nut All others tapped and bolted

9. Design | Fabrication Life Support System Main Air 72 ft 3 onboard steel tank Smaller in size yet still adequate Strapped in for safety and easy positioning Backup Air 3 ft 3 spare air tank Allows 57 breaths on the surface Personal Harness Removable snare drum harness Requires no restraints on driver

10. Design | Fabrication Safety Systems Emergency Buoy Sealed, gasketed, plastic container Activated via a dead-man switch Attached by 50ft of line separate from the switch Fits flush with the hull for aesthetics Strobe Light Press-fit into the hull and sealed into place Visible for up to one mile underwater Flashing rate of once per second Door Latch Spring-loaded steel tube into a sleeve in the door Line is run from the tube to the driver’s hands Windows Allow visibility of the driver

11. Testing | Training Dry Testing Driver fitment Emergency systems Drivetrain alignment and tolerances Installation of the control surfaces Wet Testing Pool test – buoyancy, driver fitment, emergency systems Diving Two team members got scuba certified Driver is a certified rescue diver

12. Journal | Budget Photographic Records Pictures taken nearly every work day Over 1000 photos taken and over 350 logged Written Journal Plans in effect to keep useful tips and tricks for the succeeding teams Sponsors Attempts at local sponsorship failed University of Florida’s Mechanical and Aerospace Engineering Department ASME student chapter at UF` Overall Budget Around $6000

13. Closing Remarks We are truly greatful for the chance to bring the Gators back into the International Submarine Races and compete with other human powered submarines. The raw learning experience, applied engineering skills and unveiled perseverance that bring a project of this magnitude from nothing but a dream to competitively racing in three months awards this team its own personal win regardless of any further outcomes. For us, this has been about expanding the design project possibilities for the young engineers at the University of Florida – and so we’ll leave #1 regardless of the scoreboard. GO GATORS!