The big question is that out of these blade profiles, which one is the most suited for industrial use ?. To get answer for this question let’s see how power consumption varies with discharge for each of these cases. For backward curved blades as energy head decreases with discharge power consumption stabilizes with flow. In radial blades since head does not have any connection with flow rate, power consumption increases linearly. In forward curved blades since energy head increases with flow power consumption increases exponentially.This will make the operation unstable and will eventually lead to burnout of motor.So backward curved blades which has got self stabilizing characteristics in power consumption is the most preferred one in industry