Now, these are the two major conclusions that we get from this simple axial momentum theory. These two conclusions still hold and they are valued. But as you might have noted we have made very drastic assumptions for this theory, is not it? and one of the main assumptions we have made is that there is no rotational increment of velocity; that means, as if the water is only having straight line velocity, but if we have a disc, of course the water will also rotate, is not it? You cannot avoid that.