Compressed air is injected in the air casters underneath an object to reduce the frictional force thereby reducing the (applied) force required to easily move heavy equipment over hard & flat surfaces. With such an arrangement, the heavy object floats effortlessly and completely without vibration on a film of air above the ground. The coefficient of friction is reduced to 0.001, which means, for instance, that a force of only 10 N is required to move a load of 1,000 kg. That in turn means that a single person is able to move a load weighing tons in all directions – forwards, backwards, sideways – or turn it around its own axis without the need of crane or forklift. However it uses very large amount of compressed air at @ 100 psig(g) / 7 bar(g), for example, to move very large electric transformer, switchgear equipment within the shopfloor of a factory.
