This book is about mechanical design engineering, in particular design for mechanical system durability and performance density. It addresses diversified mechanical design issues that relate to several application areas, and provides potential solutions. This book will be of use to senior-level mechanical engineering students, design and application engineers as well as consulting engineering firms. It could help them to learn how things could be designed the wrong way, and how old experience could prevent novice mistakes, to avoid being tempted into any of the various subtledesign pitfalls and confronting their consequences.