FIVE FAST FACTS

1 More negative impeller angle means a higher stall speed

2 A shallower angle on the stator vanes means a higher stall speed

3 The number of vanes in the stator affects torque multiplication and stall speed

4 Interior clearances also affect stall speed; the larger the clearances, the greater the stall speed

5 The turbine is a driven element and doesn’t affect stall speed