Screw Conveyor Power Calculation Formula

jan 05, 2007 dir sir, i want to kown how to calculate power for a screw conveyor.Could you give me a formula for it? if my parameter is screw pitch is 400mm, diameter of the screw blade is 400mm,the srew rotary revolution is 40 rpm.The capacity of the device is 25 cube meter per hour, degree of filling is 50% and the inclination angle is 3 degree.