The air cushion under a hovercraft is produced by a large fan which blows air downwards between the craft and the water or ground, and so lifts up the craft. The air is main-rained at higher than atmospheric pressure by a flexible rubber "skirt" around the bottom edge of the hovercraft,...
Millions of years may pass away; The sun no longer shines by day; The stars burn out and lifeless be; The earth freezes up from sea to sea, And yet time never takes as toll The deathless substance of a soul. Eternal Vigilance is the price of freedom. It may seem like you are ...