[Pecos]

In theory, there is no difference between theory and practice, but in practice, there is. Writers of pieces like this should learn one word, if nothing else. That word is "scalability". Learn how to spell it. Use it often. The Russians have built and deployed torpedoes that sheath themselves in air bubbles, and they can go upwards of 200 knots, as I understand it. But only for a short distance.

Shanghai to San Francisco is 6145 statute miles, along a great circle route, which would call for the submarine to burrow its way through Japan on the way to the West Coast. Also, in order to make this trip in the advertised 100 minutes, it would have to travel at 3840 mph, or almost twice the speed of an SR-71.

This is not on my Short List of Things to Worry About.

[samtheman]

In theory, there is no difference between theory and practice, but in practice, there is.

—Albert Einstein

[The_Republic_Of_Maine]

Thank you.