Is there such a thing as different fan blade pitches for condensers?

Air is being pushed out the sides of the top instead of directly out of the top of the unit. In other words, you can put you hand directly over the top of the unit and not feel anything. All the air is coming out around the sides at the top.

Is it a 1994 Resco 3 Ton unit.

I am not the original owner of this unit and my thoughts are that someone along the line maybe put on the wrong blade.