This second edition of this textbook has been extended to feature a number of contemporary studies in practical aeroplane design. Mathematics - which general readers may skip - is the minimum needed to work out common-sense shapes, aimed at meeting the certification requirements of the three world airworthiness authorities: the American FAA, the British CAA and the European JAA. Land and seaplanes are included, from microlight and commuter, to a 30-seat surface-effect (ekranoplan) regional transport, to satisfy specific markets. A new chapter, on using the back of an envelope, shows how to make ballpark technical judgements.