Geoffkait
You said, "Gases are compressible, too." I Never said they weren’t. Sheesh! Never said air is not a gas, either.
Furthermore, I said air is a fluid, not a liquid. Hel-looo!
Obviously liquids are not compressible, at least not generally speaking.
google is my friend.
A fluid is any substance in which the molecules are free to flow. This includes both gases and liquids.
A liquid is any substance in which molecules are free to flow, and volume is fixed or nearly fixed. Liquids are a subset of fluids.
Thanks for validating what I said. So getting back to the the air spring device for a second it acts like a spring because air is compressible and the air inside the airspring is under considerable pressure, that pressure a function of the airspring and the load. I used one of my Nimbus platforms under my Very heavy Maplenoll turntable, so with the ballast (100 lb) plus the mass of the Maplenoll the air spring had to be pumped up to 80 lbs of pressure.