This book presents current research from across the globe in the study of the types, technology and application of propulsion engineering. Topics discussed include the new innovation technology of non-rocket propulsion systems for space launch and flight; femtotechnology and AB needles; lower current and plasma magnetic railgun; propulsion technologies in the frame of the European Space Agency's (ESAs) next generation gravity mission; distributed propulsion technology for commercial aircraft and solid propellants for ablative laser propulsion.