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The new ‘supercavitation’ methodology could see the vehicles travel at rates up to 3,600 mph underwater, being able to make the trip from Shanghai to San Francisco in about two hours. BY  DAVID HARDING    NEW YORK DAILY NEWS   Sunday, August 24, 2014, 1:54 PM Chinese scientists are working on creating a submarine that would be able to travel at speeds up to 3,600 mph. Previous Next   Enlarge It is a   distance of more than 6,100 miles. But a team of Chinese scientists claim to have moved closer to developing a supersonic submarine, which could complete the journey from Shanghai to San Francisco in less than two hours. Researchers from the Harbin Institute of Technology say they have developed a way to make a submarine — or torpedo — to travel at extremely fast speeds underwater. Li Fengchen said his team of scientists can now create the complicated air "bubble" required for fast travel undersea. This bu...