Excerpt from Elementary Principles of Aeroplane Design and Construction: A Textbook for Students, Draughtsmen, and Engineers The object of the present volume is to endeavour to fulfil the needs of students, draughtsmen, and others, for an inexpensive book of an elementary nature, dealing with the fundamental principles under lying the design and, to a certain extent, the construction of aeroplanes. The subject of aeroplane design is essentially one involving a thorough knowledge of mathematics and mechanics, combined with a practical knowledge of the existing conditions to be ful filled, and a firm acquaintance with the results of aerodynamical research. To the student approaching the subject for the first time much difficulty is presented, owing to the widely scattered sources of information, and to the specialized and often difficult nature of the information when obtained. It is therefore hoped that the present book will prove helpful in placing before the reader, in a more or less intelligible form, the general principles underlying aeroplane design, and in serving as a breach or introduction to more advanced treatises. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.