Flight Theory and Aerodynamics A Practical Guide for Operational Safety 3rd Edition
The third edition of Flight Theory and Aerodynamics was revised to further enhance the book’s use as an introductory text for colleges and universities offering an aeronautical program. The publisher conducted a survey with aviation schools to determine what was needed in an updated text. The result is this third edition that meets not only classroom requirements but also practical application.
All seventeen chapters have some level of updating and additional content. The revision retains mathematical proofs, but also seeks to provide a non-mathematical discussion of aerodynamics geared toward a more practical application of ﬂight theory. As such, it is a how to handbook as well as one about the theory of ﬂying. It was written for all participants in the aviation industry: Pilots, aviation maintenance technicians, aircraft dispatchers, air trafﬁc controllers, loadmasters, ﬂight engineers, ﬂight attendants, meteorologists, avionics technicians, aviation managers, as all have a vested interest in both safety and operational efﬁciency.
Updates in the third edition:
•New sequence of chapters for better ﬂow of topics
•Extensive upgrade to the helicopter chapter, including discussion of other types of rotorcraft
•Added modern graphics, including correlation with current FAA publications
•Added detail in subject matter emphasizing practical application
•Additional terms and abbreviations
The authors would like to thank our contacts at Wiley for their support throughout this revision as well as the support of our colleagues and families. In particular the authors would like to thank Steven. A. Saunders for his technical contribution to this revision, employing over 50 years of military, airline, and general aviation experience in the process. Finally, the authors would like to gratefully acknowledge the previous work of Charles
E. Dole and James E. Lewis for their contribution to improving aviation safety throughout the aviation industry.
Joseph R. Badick
Brian A. Johnson
A basic understanding of the physical laws of nature that affect aircraft in ﬂight and on the ground is a prerequisite for the study of aerodynamics. Modern aircraft have become more sophisticated, and more automated, using advanced materials in their construction, requiring pilots to renew their understanding of the natural forces encountered during ﬂight. Understanding how pilots control and counteract these forces better prepares pilots and engineers for the art of ﬂying, and for harnessing the fundamental physical laws that guide them.
Perhaps your goal is to be a pilot, who will “slip the surly bonds of earth,” as John Gillespie Magee wrote in his classic poem “High Flight.” Or maybe you aspire to build or maintain aircraft as a skilled technician. Or possibly you wish to serve in another vital role in the aviation industry, such as manager, dispatcher, meteorologist, engineer, teacher, or another capacity. Whichever area you might be considering, this textbook will attempt to build on previous material you have learned, and hopefully will prepare you for a successful aviation career.
THE FLIGHT ENVIRONMENT
This chapter begins with a review of the basic principles of physics and concludes with a summary of linear motion, mechanical energy, and power. A working knowledge of these areas, and how they relate to basic aerodynamics, is vital as we move past the rudimentary “four forces of ﬂight” and introduce thrust and power-producing aircraft, lift and drag curves, stability and control, maneuvering performance, slow-speed ﬂight, and other topics.
Up to this point you have seen that there are four basic forces acting on an aircraft in ﬂight: lift, weight, thrust, and drag. Now we must understand how these forces change as an aircraft accelerates down the runway, or descends on ﬁnal approach to a runway and gently touches down even when traveling twice the speed of a car on the highway. Once an aircraft has safely made it into the air, what effect does weight have on its ability to climb, and should the aircraft climb up to the ﬂight levels or stay lower and take “advantage” of the denser air closer to the ground?
By developing an understanding of the aerodynamics of ﬂight, how design, weight, load factors, and gravity affect an aircraft during ﬂight maneuvers from stalls to high speed ﬂight, the pilot learns how to control the balance between these forces. This textbook will help clarify these issues, among others, hopefully leaving you with a better understanding of the ﬂight environment.
An introduction to aerodynamics must begin with a review of physics, and in particular, the branch of physics that will be presented here is called mechanics. We will examine the fundamental physical laws governing the forces acting on an aircraft in ﬂight, and what effect these natural laws and forces have on the performance characteristics of aircraft. To control an aircraft, whether it is an airplane, helicopter, glider, or balloon, the pilot must understand the principles involved and learn to use or counteract these natural forces.
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