The 100-Knot Superboat That Never Was
explored the world of MHD drive-powered superboats . Short for "magnetohydrodynamic," MHD drives hoped to one day revolutionize ocean-going vessels by increasing their tops speeds to 100 knots, but the low efficiency of these experimental drives made them impractical for wide implementation. A vast shape darts beneath the polar ice flows, and is gone, as silent as a living creature, but far swifter. Clad in steel, and traveling at over 100 miles per hour, it leaves only a mist-like trail of bubbles in its wake. There are no great screws or turbines churning the water. In fact, there is no s...
Source: popularmechanics.com