1. Definitions and breakdown of traction modes
Means of transport exist thanks to the energy developed by different sources, originally reduced to two:
energy from animals or man for land transport; traction is said to be "autonomous";
propulsion generated by the force of the wind, available to ships all along their journey at sea.
1.1 Autonomous drive
A motor vehicle is said to be self-propelled when it has the necessary energy source on board.
The railroad began and developed, thanks to the fuel (coal) needed to produce steam, which moved a piston in a cylinder to drive the axles.
From the 1930s onwards, the development of the internal combustion engine (gasoline...
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Definitions and breakdown of traction modes
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"Railway systems"
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