Thanks for explaining what a supercharger is.
Re: "straight-lobe-profile-rotor".
I see that you're not familiar with Eaton. The MP62 (and all others in the M series) have 60° helixed rotors.
The newer Eaton MP blower no longer uses a simple triangle for a discharge port, like this shown on an older M62
But now resembles a NACA duct, like this MP62:
1. is this correct?
2. not only is the area different (perhaps smaller) and L/W ratio far different, and covers a different...