Representative types of aircraft (UK and US) are used to show how these principles are applied in their systems. This edition includes expanded sections on the principles of flight, auto throttle control, digital computer based systems and a new chapter on auto controls for helicopters. Also includes a new chapter on fly-by-wire controls systems. The material is intended for aircraft maintenance students and compliments the ground studies of student pilots. Softback. B&W illustrations. 323 pages.