UCSD Human Powered Submarine Team – Odin’S Rage 2009

Team History 1999 – 2000: “Subsonic” Set new world record speed of 3.47 knots Unique non-propeller driven design. Utilized a “dolphin tail” motion

Project Management Team Plan Use Brand New Hull Divide the project into parts and create responsible groups Drive Train Steering Fin

Hull 5 layers of fiberglass Cured with “Sun-rez” UV cured resin Acrylic windows Additional 2 layers around belt for strength Knee and Heel blisters to reduce volume

Drive Train Design Using SolidWorks Cad Software helped us design for simple manufacturability. Using a bike-chain drive, it moves a piston rod to translate rotational motion to lateral motion 3:1 Gear Ratio gives us the needed mechanical advantage

Drive Train Construction 99% of all materials used are either aluminum, stainless steel, or plastic for corrosion resistance. By modifying store bought bicycle parts we kept fabrication simple. The lightened aluminum boom is hollowed out to reduce weight but not sacrifice strength

Fin Design Instead of adapting theoretical biometric fins (fish, dolphin, etc.), use a symmetric airfoil to calculate thrust The boom sweeps 90° and the fin is free to rotate 90° relative to the boom, which provides great lift and little drag. Combining high sweeps per minute with a large surface area wing of high aspect ratio gives the best theoretical performance.

Fin Construction A CAD model from SolidWorks was machined using an automated milling machine (CNC technology) Ensuring symmetry Layered with Fiberglass Fitted with sweep-limiting knuckle.

Steering Surfboard fins Morse Cables Simple actuation Strong materials Epoxied Shaft Wide range of motion Large Surface area Avoid Walls!

Controls Mounting all controls, mechanically, to a single handle Removes electrical problems Frees other hand as solid support base. Hydraulic actuators have been replaced with Morse push-pull flexible cables for corrosion resistance and ease of operation and maintenance

Safety Features Quick release hatch - just pull! No need for pilot restraint Spare air in case the pilot’s main air supply fails Clearly-marked safety features for support divers Pop-up buoy attached to dead-man’s switch

Future Goals Perfect current systems Minimize drag and maximize power output for faster speed Computer controlled variable pitch adjustment

Lessons Learned Press-fits are not truly secure! Gather Sponsors before academic year Early training K.I.S.S.

Sponsors US Grants