Hydraulic systems

The basic idea behind any hydraulic system is very simple: Force that is applied at one point is transmitted to another point using an incompressible fluid. The fluid is almost always an oil of some sort. The force is almost always multiplied in the process. The neat thing about hydraulic systems is that it is very easy to add force multiplication (or division) to the system; all you do is change the size of one piston and cylinder relative to the other.