Chapter x  Zen and Mechanical Engineering.

There is a popular book call Zen and the Motorcycle Maintenance. Looks like one of those long lasting Popular Best Seller with some sort of Philosophy. Really did some Major in Mechanical Engineering. It is really ROCKET SCIENCE. Study the Theory Concept and Formula of of Fluid Mechanics - That is how Air Flow and Water Flower can be calculated using Mathematical Formulae. The application is really for design of Jet Engine and How to Propell the ROCKET.

Something like this you see now in the market, and Hollow Fan : (far from it , but closer consumer item you can get)

Some people many really want to know how one of this  "Hollow Fan" Works