What is this part?
..............
Transmission ?
This part is not from a transmission (look again, closely; it has several hints about its origin.)
A compressor at one end and a Turbine at the other. Hmm what could it be? :-# What's the middle rotor for BTW? Or am I waaay off and this isn't from a Turbo?
Good, now go on .......
a Huge Turbo ?
turbo spool
Close guesses, but no winner yet.
turbine =p
Getting close!
turbocharger gas turbine =p
its not a supercharger.. its a turbo spool for sure.
Not a turbocharger.
Looks like a turbine shaft of some sort.
steam turbine speed controller
axial-flow engine
Turbine is the closest guess, but not the complete answer.
gas turbine
steam turbine