Planetary Trains

This book aims to achieve a scientific group known like planetary type mechanisms. Constructively, structurally and kinematically, the planetary mechanisms (the planetary trains) are generally composed of spur gears and bars. In premiere, the book determines the real efficiency of the planetary trains. Automatic transmissions have been added slowly from airplanes to automobiles, and were then generalized to various vehicles. By using the formulas indicated in this book for calculating dynamics of planetary mechanisms, used in aircraft and vehicles, the automatic transmissions can be achieved better than those known today. The book is written in romanian.