Sea Technology

SEP 2017

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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20 st / September 2017 www.sea-technology.com nose cone for propulsion. UMP- TYSQUATCH-8's top speed was 0.44 kt. Hull materials also represent- ed new ideas from the teams. KNOTTY DAWG, from the Uni- versity of Washington, used a combination of cedar strips with mahogany veneer to build their submarine in partnership with the Northwest School of Wooden Shipbuilding. University of War- wick's GODIVA 3 boat was made with recycled carbon fibers. TRI- GONUS, from A.C. Mosley High School, designed their sub based on the structure of a boxfish and constructed it with signboard. Judges also saw instances of fly- by-wire technology and sonar be- ing used by contestants. In addition to the innovations brought forward by the teams, race sponsor Booz Allen Hamilton (BAH) built a mixed-reality trainer (MRT) to demonstrate immersive technology ap- plications. The Human-Powered Submarine (HPS) MRT experience was constructed using a station- ary bike in a prone position and virtual-reality soft- ware. BAH's software technology team modeled the ISR environment of the model basin to scale and enhance the environment with game objects, global fog and multiple-particle systems to create the effect of moving through a liquid mass with lim- ited visibility. Using the stationary bike electrical outputs, BAH's engineering team created physics- based models to translate the pedal action of the bike into perceived motion through the virtual- reality environment. The physics-based models in- cluded typical human-powered submarine shape, dimension and configuration, and the pilot's output being converted into propulsion. The pilot's inputs to control surfaces were also modeled, and respon- siveness was translated to the three rotational axes of pitch, roll and yaw. The actual pilots of vessels at ISR 14 commented that the experience was realistic, except for the resistance of the pedals, which was not made adjust- able to the individual drive trains designed for the races (and getting wet, of course). Awards The Awards Ceremony was held Friday evening. Awards for Overall Performance, Innovation, Absolute Speed, Top Speed by category, Best Design Outline, Smooth Operator (for efficiency in staging for the race course), and the Best Spirit of the Races were presented. The award for Overall Performance, a trophy and a $1,000 award sponsored by Booz Allen Hamilton, was determined by quantifying 17 weighted parameters to de- termine the figure of merit (FOM) for each boat. The FOM analysis includes aspects of other awards and the team's at- titude, persistence and resourcefulness. The winning team was Team Omer from École de Technologie Supérieure for teams band together to assist teams in need by providing advice, spare parts, raw material and, in one case, a sub- marine for a team to use when theirs was delayed in transit. Participants also seek out and discuss future opportunities and career thoughts with many of the volunteers, who count among them an astronaut, successful engineers developing leading-edge technologies, retired naval officers who com- manded submarines and divers who have completed some of the most challenging dives one could imagine. Technology Technologies, old and new, have always played an im- portant role in the races. This year, Sussex County Techni- cal School's UMPTYSQUATCH-8 presented a propulsion system based on a century-old idea of Viktor Schauberger: a centrifugal pump for submarine propulsion known as a "Schauberger turbine." The pump's intake is at the bow of the submarine and discharges water out of the sides of the (Top) Overhead view of staging area. Left to right: Hernando County School entry SUB- LIME, University of Michigan GULO GULO and A.C. Mosley High entry TRIGONUS. (Bot- tom) Underwater support is provided by Uni- versity of Bath members as they prepare to load their pilot into the submarine. (Photo Credit: Devin Pisner/U.S. Navy) (Photo Credit: Julie Yankaskas)

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