I don't understand how exactly is this method better than the original concept since theoretically they are the same relative motion.<br>It is fascinating and counter intuitive, but it does work...,(reply>), When rotating the screw pressure is generated everywhere the screw counteracts gravity, so all they way up the elevator. This means it is better at transfering force, but also means that things doesn't stay as packed as every part is lifted separately.<br><br><br>In this case.. Forget the rotating tube, it is mostly irrelevant. The entire pressure is generated by the scoops in the bottom. They create pressure from below, this is the only place pressure is applied, all the way up the screw, the material is pressed up by pressure from below. This means it stays packed and act more like a packed liquid. No longer are each grain that touches the screw transfered force independently.,(reply>), Did you even watch the vid?