The LEGO(r) Technic system is a line of LEGO that opens a realm of new building possibilities-you can design LEGO models that really move with motors, gears, pneumatics, pulleys, linkages, and more. The Unofficial LEGO Technic Builder's Guide is filled with building techniques and tips for creating strong yet elegant machines and mechanisms. With author Pawel "Sariel" Kmiec's expert guidance, you'll learn the foundations of LEGO Technic building, and how to use the system to create impressive to-scale models. Sariel, a world-renowned LEGO Technic expert, offers unique insight into mechanical principles like torque, power translation, and gear ratios, all with the miniature Technic brick. You'll also learn how to build working clutch and transmission systems, differentials, and suspensions. This full color, beautifully illustrated book is a visual feast of building inspiration and includes ideas for building amazing machines like tanks with working treads, miniature supercars, cranes and bulldozers, and much more.