Magic Over Logic Product Design

“Magic - the unique way a product does what it does - is never to be underestimated. With the Dual Cyclone's see-through bin, every-”

“As I began to develop the cyclone, I thought it would be worth having a look at what had been written on the subject, for if there were simple mathematical models for the principle, it would be easy to work out how best to design the thing. This was not a fruitful exercise. I have one book which has at least six different formulae for explain- ing the movement of particles in a cyclone; they all seem to contradict each other; and they are all useless (three of these incomprehensible algebraic confections are shown below, just for fun).”