DERG
It was found that a maximum of four variables worked well to assess the ability of the student. When more options were added the results became worthless. So in this light I would be most grateful if you could limit the options to four.
Understood, I edited the previous post to reflect 4 variables.
The big intake fans on the jet engines have some really wonderful BLADE profiles..far more interesting than wing profiles.
I've never seen any fan-blade profiles used on modern commercial jets. Looking at the tips though it almost looks like they have some inverse camber (which wouldn't be surprising as at high RPM you tend to get supersonic velocities and inverse camber is well suited for supersonic airflow).