A compressed-air vehicle (CAV) is powered by an air engine, using compressed air, which is stored in a tank. Instead of mixing fuel with air and burning it in the engine to drive pistons with hot expanding gases, compressed-air vehicles use the expansion of compressed air to drive their pistons. One manufacturer claims to have designed an engine that is 90 percent efficient.
Compressed-air propulsion may also be incorporated in hybrid systems, such as with battery electric propulsion. This kind of system is called a hybrid-pneumatic electric propulsion. Additionally, regenerative braking can also be used in conjunction with this system.
Read more about Compressed-air Vehicle: History, Advantages, Disadvantages, Possible Improvements, Vehicles
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“If you would learn to write, ‘t is in the street you must learn it. Both for the vehicle and for the aims of fine arts you must frequent the public square. The people, and not the college, is the writer’s home.”
—Ralph Waldo Emerson (1803–1882)