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发帖数: 18592 | 1 China working on supersonic submarine that could travel from Shanghai to San
Francisco in '100 minutes'
Scientists at China's Harbin Institute of Technology are "a step closer to
creating a supersonic submarine that could travel from Shanghai to San
Francisco in less than two hours," reports The South China Morning Post. The
scientists have reportedly succeeded in replicating an air bubble that
would allow vehicles and projectiles — such as a torpedo — to travel more
quickly through water, which produces much more drag than air.
In theory, a supercavitating vessel could reach the speed of sound
underwater, or about 5,800km/h, which would reduce the journey time for a
transatlantic underwater cruise to less than an hour, and for a transpacific
journey to about 100 minutes, according to a report by California Institute
of Technology in 2001. [SCMP]
Of course, there are some significant obstacles to the dream of traveling
frictionlessly across the Pacific. For one, such a vessel would need an
immensely powerful rocket to reach supersonic speeds, which in turn would
create problems with steering. However, this new technology could prove
useful in other ways. "[T]here's plenty of reason to believe a submarine
could be built that would significantly exceed the speed of today's fastest
models, which lumber along at a speed of 40 knots (about 46 mph)," writes
Terence McCoy at The Washington Post. Take a look at the design below. --Ryu
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