If I replaced fan blades with congruent blades, the only difference being the second set has a higher density, would that affect the speed cap on the spin? I know it would affect acceleration, but I am talking about the speed ceiling.
P.S. Assume the blades are made of extremely rigid material and cannot change shape or break off because of a reinforced base.
P.P.S. And I was also wondering if, with the same scenario, except with a plane. Would it go faster/slower?