A few months ago we talked about the design of a hydraulic strut and mentioned that at the end of the strut there is always this hydraulic unit. The reason it is there is so that you can pump some fluid in to adjust the length of the prop so that it will always meet your size requirements.
In this video we will take a look inside a cylinder and see how that works.
For previous videos visit: https://www.youtube.com/playlist?list=PLk0Xcb0gYpUyx1rbXDFhZuf92b5ouKY_y
Video on Hydraulic Prop Design to Eurocodes: https://www.youtube.com/watch?v=u1gC5LIBbtM