دانلود کتاب The Paper Aeroplane Book

What makes paper aeroplanes soar and plummet, loop and glide? Why do they fly at all?
This book will show you how to make them and explains why they do things they do. Making paper aeroplanes is fun and. by following the author’s step- by-step instructions and doing the simple experiments he suggests, you will also discover what makes a real aeroplane fly. As you make and fly paper planes of different Designs, you will learn about lift, thrust, drag and gravity; you will see how wing size and ships and fuselage weight and balance affect the lift of a plane: how ailerons, alleviators and the rudder work to make a plane diva or climb. loop or glide, roll or spin. Once you have grasped these principles of flight, you will be ready to take off with designs of your own. Byron Barton’s clear diagrams and delightful drawings show each step for making the aeroplanes and illustrate the experiments suggested by the author.