This engraving, published in 1798, shows the gigantic St. Malo raft, designed in 1791 during the French Revolution. The engraving informs us that this extraordinary structure was 600 feet long by 300 broad, mounts 500 pieces of cannon, 36 and 48-pounders, and is to convey 15,000 troops for the invasion of England. In the midst is a bomb-proof, metal-sheathed citadel.
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"Chapter XII. On the way of making a second waggon which is propelled by the wind without draught animals, and which dashes violently over open country to the confusion of all troops"
The March 1925 issue of Science and Invention featured this Aerial Railroad. By a combination of inclined ramps and overhead suspension from cleverly curved tracks the "trolley car" passenger vehicle could go forever without power. It falls while suspended in the air from the downward inclined track, swinging forward as it does. When it contacts the lower tracks its momentum carries it up the inclined track until the whole process repeats. Source.
