I am designing a sliding vane rotary compressor for a supercharger application on a small horsepower engine, but I am having trouble with the calculations. I have some estimations that I would hope to be correct (or close) but have no way to verify them at this point. One of the toughest parts is seeming to be the geometry (changing volumes as rotor spins) used for calculating the pressure change. I basically need some way to use basic parameters such as Bore Diameter and Depth, Rotor Diameter, # Vanes, and discharge port location so that I can estimate power requirements, flow rate, and pressure boost so that I can properly size the compressor. I was wondering if anyone had any calculation equations, spreadsheets, or point me toward some documents that could help me out with this. I would appreciate any help you can give.