Da Vinci’s Helicopter: Imagining What is Not There
This book is about something very difficult: creating products that do not yet exist. That is not the same as thinking about something that is not here at the moment, but already exists somewhere else, like, say, a helicopter. Chances are, there is not a helicopter with you in the room when you are reading this. But you know enough about the principles of rotary flight, and have seen enough helicopters on television and in the sky to envision what one is like—how big it is, how noisy it is, how it is operated, and so on. You could probably even give a plausible explanation on the principles on which it flies.
What I am talking about is more like what Leonardo Da Vinci did in the ...