Pilot Training : Pilot Library : aerodynamics

Understanding Flight

by David F. Anderson & Scott Eberhardt

Publisher:

McGraw-Hill

ISBN:

9780071363778

Published Date:

2001

Pages:

239

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Finally; a detailed discussion on aerodynamics for the pilot, that doesn't require an engineering degree to understand.

Never before has it been so easy to grasp how planes fly! It is of keen importance to pilots, essential to engineers, and intriguing even to the earthbound, the principles of flight are often parroted but widely misunderstood. Now you can be among those who truly get it. This enlightening book helps you bypass common distortions, misconceptions, and half-truths and genuinely understand how aeronautics works.

This book gives you brain-and gut-level understanding of what gets you up there and keeps you up there!

*Explains flight in simple, intuitive terms
*Spares you misinformation and confusion—this book gets it right and tells it right
*100 high-impact illustrations show you lift, propulsion, and design at work
*Provides practical insights pilots can use for improved performance and safety
*Demonstrates the why's and how's of wing shape, plane construction, flight testing, and high-speed flight
*Written by pilots (one a physicist and the other a professor of aeronautics)
*Perfect for beginning pilots

Flight Training "Among student pilots, there are varying degrees of enthusiasm for the science of aerodynamics. Some prefer knowing the equations behind the principles, but many are content to learn just enough to keep the airline sunnyside up. Instructors find a quandary here: They don't want to bury an uninterested student in complexities, so they may gloss over important principles in order to keep things brief. In doing so, they risk introducing misconceptions. In fact, depending on their own training, they may not possess the depth of knowledge to explore these concepts with students who are intrigued by the math describing the motion.

Both parties can be satisfied with a new book, Understanding Flight, by David E. Anderson and Scott Eberhardt. Anderson, a scientist at Fermi National Accelerator Laboratory, and Eberhardt, an associate professor of aerodynamics and astronautics at the University of Washington, are both private pilots. After laying the groundwork by introducing a few simple concepts-the right ones-they go on to develop a different way of thinking about how airplanes fly. Later chapters delve into high-speed flight and aerodynamic testing. The math is basic enough for any high school graduate to understand and examples pepper the book..."

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4 Stability and Control
Static stability
Longitudinal stability
stability of a symmetric wing; balance; the horizontal
stabilizer; trim; flying wings; horizontal stabilizer
sizing
Directional stability
Dynamic stability
phugoid motion; dutch roll; spiral instability
Stability augmentation
handling
Fly-by-wire
Wrapping it up

5 Airplane Propulsion
It's Newton again
Thrust
Power
Efficiency
Propellers - multi bladed props; propeller pitch
Piston engines
The Turbine engine - compressors; burners; turbines
The Turbojet
Jet engine power and efficiency
The turbofan
The turboprop
Thrust reversers
thrust vectoring
Thrust augmentation
Wrapping it up

6 High-Speed flight
Mach number
Lift is still reaction force
compressible air
show waves
Wave drag and power
Transonic flight
Wing sweep
Area rule
Hypersonic flight
Skin Heating
Wrapping it up

7 Airplane performance
Lift to drag ration
Lift to drag ration form the engineer's perspective
Glide
Out of fuel
Indicated airspeed
Takeoff performance
Climb
Ceiling
Fuel Consumption
Maximum endurance
Maximum range
Turns - stall speed limit; structural strength limit;
propulsive power limit
Standard-rate turns
Landing
Wrapping it up

8 Aerodynamic Testing
Wind tunnel testing
Subsonic wind tunnels - closed-circuit tunnel; wind tunnel
data; supersonic venturis; supersonic wind tunnels;
hypersonic testing.
Flight Testing - Flight instrument calibration; the standard
day; power required; power required data; takeoff
and landing; climbing and turning; flight test accidents;
Wrapping it up

Appendix: Misapplications of Bernoulli's principle

Index

Biography
David F. Anderson is a physicist at the Fermi National Accelerator Laboratory and a private pilot.

Scott Eberhardt is an associate professor in the department of aeronautics and astronautics at the University of Washington. He is also the director of the Kirsten Wind Tunnel and a private pilot.

READER REVIEW
A Must=Read for All Serious Pilots Donald Hogue (dontrain@ameritech.net) , a pilot, 02/12/2001

Both authors are scientists and pilots and have teamed up to scientifically challenge some of our traditional explanations of flight found in ground school texts and popular books on airplanes and flying. In fact, the authors point out (and prove) some of the traditional explanations of the physics of flight are just plain wrong. Together these co-authors present an impressive combination of knowledge about airflows, physics, aeronautics, and piloting. The authors point out that the widely preached Bernoulli explanation of a wing creating lift, when applied to a Cessna 172 at gross weight, demands that the plane’s airspeed must be over 400 mph to produce the necessary lifting at minimum flyable airspeed. Obviously, this is not reality. The Bernoulli description, we also learn, depends on the rule of equal transit times of the air over the wing and the air moving under the wing. So if it is not Bernoulli, what is keeping the airplane in the air? 'Newton!', the authors reply. Our intrepid authors make the argument that the airplane wing produces lift because it is literally reacting upward in response to the huge amounts of air being drawn across the top and diverted down behind the trailing edge of a wing. A must-read for every pilot is the book's description of the physics of flowing air bending around the a curved wing surface. We learn that it is the Coanda Effect, viscosity, and boundary layer that keep the air bent over the curvature of the wing. And without these phenomena flight is not possible. These explanations will lead us to answering such intriguing questions as how vortex generators work, why we can't hose the dust off our car, why golf balls are dimpled, why frost on airplane wings is a problem, and how baseball pitchers throw a curve ball. Understanding Flight makes a valuable contribution to the understanding of the physics of flight and is certain to provoke vigorous discussion in the aviation community. Some of the practical explanations in the book confirm what to pilots may have been only an intuitive suspicion. Both Anderson and Eberhardt are private pilots, which undoubtedly motivated them to keep focused on the simple highly useful physics of flight, carefully supported by flying experience and good empirical science. Highly recommended to any serious aviation enthusiast.

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