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Both propeller-driven and jet-engine airplanes are shown in detail. Kids also discover the principles that allow a heavy airplane to rise and remain in the air, and to maneuver, climb, dive, and come to a safe landing. The profusely illustrated How It Works Books present brief histories of engineering development. Detail drawings show mechanical parts and cut-away illustrations show how the parts are assembled and work together. This book's lift-the-flap illustrations reveal successive layers of detail in airplane construction.