The book is devoted to hypersonics, including experimental work in shock tunnel flows with emphasis on the influence of "real gas" effects on aerodynamic phenomena encountered in hypersonics and aerospace studies. Numerical methods used for the determination of hypersonic flowfields, including chemical effects, are presented and applied to steady and unsteady configurations. The book also contains recent progress in shock tube and shock tube tunnel technology, including free piston shock tunnels, diaphragmless shock tubes, various processes for improving shock tube performances and numerous diagnostic techniques used in millisecond facilities such as force, moment measurements and optical methods. Papers on mixing problems in supersonic combustion and applications to ram accelerators are also in this volume. This volume is addressed to scientists working on "hot" hypersonics, aerospace engineers, shock tube designers, researchers using shock tubes and associated equipment, and CFD people trying to simulate complex reactive flowfields.