Screw Conveyor Engineering Guide .
Screw Conveyor Engineering Guide. You are here: Home; Resources; Screw Conveyor Engineering Guide ; Horsepower Calculation; Graphic Method of Calculation. The total horsepower (TSHP) required at the drive shaft to drive the loaded conveyor system may be calculated graphically by use of the nomographs at the end of this section. The friction horsepower (FHP), determined with the first .