PREFACE  The purpose of this textbook is to present the elements of applied  aerodynamics and aeronautical engineering which relate directly to  the problems of flying operations.  All Naval Aviators possess  a natural  interest in the basic aerodynamic factors which affect the performance  of all aircraft. Due .to the increasing complexity of modern aircraft,  this natural interest must be applied to develop a sound understanding  of basic engineering principles and an appreciation of some of the more  advanced problems of aerodynamics and engineering.  The safety and  effectiveness  of flying operations will depend greatly on the under-  standing and appreciation of how and why an airplane flies. The  principles of aerodynamics will provide the foundations for developing  exacting and precise flying techniques and operational procedures.  The content of this textbook has been arranged to provide as com-  plete as possible a reference  for all phases of flying in Naval Aviation.  Hence, the text material is applicable to the problems of flight train-  ing, transition training, and general flying operations. The manner  of presentation throughout the text has been designed to provide the  elements of both theory and application and will allow either directed  or unassisted study. As a result, the text material ’ will  be applicable  to supplement formal class Iectures and briefings and provide reading  material as a background for training and flying operations.  Much of the specialized mathematical detail of aerodynamics has  been omitted wherever it was considered unnecessary  in the field of  flying operations. Also, many of the basic assumptions and limita-  tions of certain parts of aerodynamic theory have been omitted for the  sake of simplicity and clarity of presentation.  In order to contend with  these specific shortcomings, the Naval Aviator should rely on the  assistance  of certain specially qualified individuals within Naval Avia-  tion.  For example, graduate aeronautical engineers, graduates of the  Test Pilot Training School at the Naval Air Test Center, graduates of  the Naval Aviation Safety Officers  Course, and technical representatives  of the manufacturers are qualified to assist in interpreting and applying  the more difficult parts of aerodynamics and aeronautical engineering.  To be sure, the specialized qualifications of these individuals should  be utilized wherever possible.  iii 