A comprehensive guide to aircraft powerplants, the ninth edition of Aircraft Powerplants by Thomas W. Wild offers an authoritative resource for students and professionals seeking to understand and master the operation and maintenance of aircraft engines. Fully updated to include the latest advancements in technology and engine models, this textbook provides clear explanations of all engine components, mechanics, and technologies. New sections cover diesel engines, alternative fuels, pressure ratios, and both reciprocating and turbofan engines, making it an indispensable tool for achieving FAA Powerplant certification. Hundreds of detailed diagrams and photos enhance the learning experience, ensuring a thorough understanding of aircraft powerplants.