Supersonic Submarine

Photo credit: Daily Mail

Penn State and US Navy researchers are developing a supersonic submarine using a technique called supercavitation, or in other words, enveloping a submerged vessel inside an air bubble to lessen water drag. Theoretically, a supercavitating vessel could hit 3,600mph underwater, enabling one to travel from Beijing, China to San Francisco in just 100-minutes. “Basically supercavitation is used to significantly reduce drag and increase the speed of bodies in water. However, sometimes these bodies can get locked into a pulsating mode,” said Grant M. Skidmore, recent Penn State Ph.D. recipient in aerospace engineering. Click here to view the first image in today’s viral picture gallery. Continue reading for the five most popular viral videos today, including one showing how to make an emergency spare key at home.

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