Simons. The standard work on its subject, for this fourth edition several sections have been added, all the illustrative diagrams have been redrawn and a number of photos have been included. Practical advice covers all of the hobby's most significant recent developments including miniature turbojet engines, and propellers and batteries for electric-powered models. Information is presented in a concise and practical form for the enthusiast. 352 pgs., 7½"x 9¼", sfbd. #0003023