YouĬompressed the air and forced it into the balloon under pressure. You did what scientists call work on the balloon. (your breath) over a distance (the amount you inflated the balloon): The balloon a little bit more, pushing outward with some forceĪgainst the air pressure and the stretchiness (elasticity) of the Think back to that balloon you blew up and let go. Photo by US Bureau of Reclamation courtesy of US Library of Congress. ![]() Photo: Pneumatic machines, like this hammer drill, are powered by hoses that deliver energy and force in the form of pressurized (compressed) air. As we'll see shortly, pneumatics is similar to hydraulics, where we useĪ crane both are examples of fluid power, but where hydraulics uses Robot paint machine uses compressed air to make an even spray across something like a car body. Pumped up and down by compressed air feeding in from a hose, while a So a pneumatic drill (or jackhammer) can blast the pavement apart with a metal chisel What is pneumatics? Pneumatics is the science and technology of pressurizedĪir-using piped, compressed air (or a similar gas, such as nitrogen) to Here's a pneumatic cylinder with air hoses attached, forming part of a NASAĮlectric arc shock tube, which is used to carry out tests on space-vehicle reentry. Photo: Pneumatics is used in some ingenious machines. It's all down to the simple science of pressureĪnd the way gases store energy when you squash them up. Or power a train with just a big old bag of nothing? ![]() Such wonderfully useful things? How can you lift a helicopter, drill a hole, It sounds like a hugeĬontradiction: how can something as useless and empty as air do From factory machines and roadĭrills to paint-spraying robots and power tools, all kinds ofĮveryday things rely on pneumatics. Old joke back then was really a basic lesson in pneumatics-putting Remember a time when you blew up a balloon, held it a moment, then let it zoom madly round the room? What seemed like a great big, goofy
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