to the chamber at a speed of 200 kilometers an hour this not only cleans the surface of the component the bombardment makes the steel harder and more corrosion resistant the process takes an hour then the doors are opened and with the help of a crane the men remove a perfectly cleaned engine block from the shot blasting chamber the razor-sharp casting noses also have to be cut off the crankcase can then leave its birthplace for transportation to Lake Constance Assembly of the mega engines takes place at the NTU plant in