Salacia (2015 to 2016)
Salacia raced at the Carderock naval base in America in June last year where she proved she was the best British submarine by beating all other UK participants. The design was similar to Menrva although the hull was shorter and less tall, as it was designed for a specific pilot, something which had never been attempted before. The idea was to make it as small as possible, while still giving the pilot room to pedal.
Building on our knowledge from previous years, a new control system was designed that was easy to fit and fix when problems occurred. This new control system proved to be very effective, allowing easy control of the submarine. This was also the first year any electronics were attempted. Although there were a few teething problems with waterproofing, it has provided us with experience and confidence to try again this year .
Menrva (2013 to 2014)
Menrva was built and raced at Carderock, USA in 2013. The hull design was completely different to anything we had tried before, in particular she was shorter and narrower than the previous designs, to give her more stability in the water. This design proved very effective, as the fastest speed record for BURST was achieved that year. Menrva was raced again at Haslar, Gosport in 2014, where the changes made from the previous year included a completely new drive-chain, gear box, and props. The control mechanism wasn't changed, as there was not enough time. That proved to be a problem, as during the third day of races, the control cables snapped, meaning the pilot lost all steering during a run. The problem took a day and a half to fix, although Menrva did manage to make a successful run.
Minerva (2011 to 2012)
Minerva was designed and built in 2011. The hull design was very similar to the previous hull designs, although she was given new internals for the first eISR race that was held in Gosport, UK. This was the first time any of the subs had been refitted, by placing new internals into an old hull. The European course was designed to demonstrate manoeuvrability as well as speed.
Sulis raced in Bethesda, Maryland, USA in 2009. She was the first and only submarine to have been created (to date) in the hybrid class, which is a combination of propeller and non-propeller propulsion.
Seabomb (2007 & 2011)
Seabomb was the first submarine ever built at the University of Bath, she was a biomimetic submarine who had paddles that tracked in and out to produce a forward motion. The pilot laid on their back using a shunting leg motion on the pedals to operate the fins. This however was a problem as the pilot could not see the lights on the floor. A few quick modifications to the bottom of the hull allowed the pilot to see the course.
She was a very successful sub and came 2nd in the non-propeller division of the ISR. Seabomb was taken back to the American races in 2011, and raced with a few modifications inspired by Menrva. The control fins were retrofitted from Minerva to Seabomb, and the window was removed to decrease the drag.