Cooling Fans

[RPMagoo]

Have been told that a 4 blade fan cools better than a fan with more blades. -- Is this true ?

 

[PurpleBeeper]

No way unless the fan with more blades spins a lot slower

 

[Black_Sheep]

Have been told that a 4 blade fan cools better than a fan with more blades. -- Is this true ?

That has not been my experience. There’s too many variables such as pitch, diameter, shroud or no shroud, etc… to make a blanket statement that 4 blade fans cool better.