[Skyehawk]

Is sounds as if you are trying to create a pneumatic jack with frc parts. Read up on pneumatic jacks before attempting this. There is a significant difference between hydraulic systems and pneumatic ones. It is not impossible, but you will need very specific amounts of air pressure (multiple regulators?). Also each air pressure is good for a certain load. You may also want to look into how gas springs work in order to figure out a way to go about this task. Good luck!