I have become quite interested in pump physics recently. I do a lot of work on cars, this includes work on automatic transmissions. Two main types of pumps I see inside an automatic transmission are the gear pump and the rotary vane pump. In a transmission these pump fluid (also a cars oil pump is typically a gear pump which also pumps fluid) My question is, how would these pumps fair in pumping a GAS instead of a liquid? Would they work? My guess is they would work but may need to run at a higher RPM to account for the fact that gasses compress a great deal. Can anyone provide any insight? Thanks to anyone who takes the time to answer!