UCSD Human Powered Submarine Team Stanley 2009

Team History 1999 – 2000: “Subsonic” Set new world record speed of 3.47 knots New unique non-propeller driven design. Utilizes an “underwater rowboat” motion 6 previous Submarines Brother Submarine: Odin’s Rage Team: Faculty Non-Faculty Undergraduates

Project Management Stanley Plan Design and Fabricate within 1 years time Divide the project into 3 constituent parts Drive Train/Propulsion Hull Pool Testing/Computational Modeling

Drive Train Design Simple and Effective Leveraged linear slide system Historically established propulsion methodology “Drebel” Linkage system harnesses pilot’s quadriceps and gluteus maximus in unison. 60 degree Power Stroke Feathered paddles allow for minimal losses during the return stroke.

Drive Train Construction Unique binding system for pilot’s. Adaptive paddle mount system allows for propulsive improvement The break away oars/paddles makes transportation easier as well as creates less of a risk for damage.

Hull Ready made solution Classically streamlined body Secondary sections Special order acyclic nose cone Hand rolled aluminum tail cone

Pool Testing Purpose of pool test Establish hull strength Find Center of pressure Center of gravity Pilot ergonomics Subs water weight

Computational Modeling Estimated top speed 3.4857 Knots Solving the governing equations of Fluid Dynamics for a complex flow is difficult. Approximate dominant propulsion dynamics Matlab Simulation Momentum transfer Paddles displace water mass Water mass travels rearward at average velocity Average velocity of water mass can be calculated by accounting for forces Drives trains inertia Paddle and oar drag forces Paddle and oar bending due to drag forces Assumptions Average Human Power Output 224 Watts for short term (5-10 min’s) bursts Turbulent flow

Safety Features Quick release hatch - just pull! Simple two-step pilots foot binding release Spare airs in case the pilot’s main air supply fails Clearly-marked safety features for support divers Warning markings on moving boom and paddles

Future Goals Lift based propulsion Sophisticated emergency float Minimize drag from hull and propulsion Computer controlled guidance system

Lessons Learned Professionalism Matlab simulation Materials science Fluid mechanics Industrial engineering Professionalism

Sponsors US Grants