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Updated: May 14, 2025
But Napoleon and his scientific advisers did not believe in the practical possibility of a self-propelled boat, and although the Scotch-built engine of the little craft puffed merrily on the Seine, the great Emperor neglected to avail himself of this formidable weapon which might have given him his revenge for Trafalgar.
About the beginning of 1800, self-propelled vehicles steamed along the roads of Old England, carrying passengers safely, if not swiftly, and, strange to say, continued to run more or less successfully until prohibited by law from using the highways, because of their interference with the horse traffic.
Gliding, self-propelled in his chair on wheels, through the opening made for him among the crowd, a strange and startling creature literally the half of a man revealed himself to the general view. A coverlet which had been thrown over his chair had fallen off during his progress through the throng.
Steam and gasoline vehicles can be used to travel long distances from the cities, for water can be had and gasoline bought almost anywhere; but electric automobiles, driven by the third of the three powers used for self-propelled vehicles, must keep within easy reach of the charging stations.
Suddenly the answer came to him a self-propelled underwater grenade! Horrified, Bud jetted forward, tackling the diver at full speed. A split second too late! The grenade went streaking straight toward Tom Swift! Tom's earphones caught the hiss of the approaching grenade. Instantly his eyes darted to the sonarscope on his wrist. A tiny blip of light was moving on the screen!
"I won't bore you, yet, with explanations of my radio-combinator, the telecommutator, the aerial coherer relay, and the rest of the technicalities of wireless control of dirigible, self-propelled vessels.
The success of his explosive gasoline engine, forerunner of all succeeding gasoline motor-car engines, was the incentive to inventors to perfect the steam-engine for use on self-propelled vehicles. Unlike a locomotive, the automobile must be light, must be able to carry power or fuel enough to drive it a long distance, and yet must be almost automatic in its workings.
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