Hello! Here is a small Tesla turbine: http://www.epicphysics.com/model-engine-kits/tesla-turbine-kit/ First of all, for some reason, he doesn't say how many PSI he puts in, to reach that 80-100K RPM goal. Does anyone have a crude estimation of the PSI? Would it be in the area of 1-10 PSI or 10-20 PSI ? I saw other DIY style Tesla turbines on the web, that claim they use 20-40 PSI, so i guess that would be the range in this case as well, although somewhat a smaller turbine here? Secondly, just from looking at the design and understanding the underlying principles of the Tesla turbine, does anyone know if it's possible to connect a small CD DC motor to the shaft and create the reverse operation? e.g. make the turbine act as a compressor? If this is what will happen, when attaching a motor to the turbine, as is, with no changes at all, it will become a compressor, then my question is this: Say the motor attached is as mentioned, a 50K RPM CD DC small motor. If he needed, say, 15 PSI, to create 50K RPM, does it mean that when i connect the 50K RPM motor, i will get back somewhere close to 15 PSI or much less? Thanks a lot!