Chinese Supersonic Submarine Could go 3,600 MPH, in Theory By Zach Do Done On this page Word Browser Share: Cite / link: supercavitation [‚sü·pər‚kav·ə′ā·shən] (fluid mechanics) An extreme form of cavitation in which a single bubble of gas forms around an object moving rapidly through water, enveloping it almost completely so that the water wets very little of the object's surface, thereby drastically reducing viscous drag. Imagine submerging outside of Shanghai and then breaching the sea’s surface in San Francisco less than two hours later. Sound impossible…and a bit scary? It might be, but that’s what researchers in China are trying to find out. China’s Harbin Institute of Technology told the South China Morning Post (SCMP) that it was studying a phenomenon called supercavitation for use in submarine propulsion, which in theory could allow for underwater traveling speeds of up to 3,600 mph. Compared to the US Navy’s Ohio-class submarines, which reportedly top out at around 29mph, these speedy Chinese subs would effectively be the hypercars of the submersible world. Chinese Supersonic Submarine Could go 3,600 MPH, in Theory - Yahoo Autos Thats Petty Scary to think about!