Produced by James Simmons. This file was produced from page images at Google Books. Transcriber’s Note This book was transcribed from a scan of the original found at Google Books. I have rotated some images and have corrected the misspelling of "aileron" that appeared many times in the original text. [Illustration: A model aeroplane rising from the water.] THE SECOND BOYS’ BOOK OF MODEL AEROPLANES BY FRANCIS A. COLLINS AUTHOR OF "THE BOYS’ BOOK OF MODEL AEROPLANES" ILLUSTRATED WITH MANY PHOTOGRAPHS AND DIAGRAMS BY THE AUTHOR NEW YORK THE CENTURY CO. 1911 Copyright 1911, by The Century Co. Published October, 1911 THE SECOND BOYS’ BOOK OF MODEL AEROPLANES FOREWORD It is assumed that the reader is familiar with "The Boys’ Book of Model Aeroplanes." Some knowledge of the history of aviation and the early models, big and little, will be found helpful, but not essential, as a preparation for the present volume. Within the year so much has been learned of the science of model aeroplane construction that an entirely new and more detailed treatment of the subject seems to be justified. Since the length of model aeroplane flights has been increased ten times, their improvement is comparable to that of the large man-carrying machines. The science has become more exact, and the chance of failure reduced, until to-day successful flights are within the reach of all. In the preparation of this volume thanks are due to the New York Model Aero Club, to Mr. Edward Durrant, Percy Pierce, Cecil Peoli, W. S. Howells, Jr., and to the young gentlemen whose models are illustrated herewith, who, singly and collectively, are doing much for the development of the science in America.