- Tapa blanda: 346 páginas
- Editor: McGraw-Hill Professional; Edición: 02003 (1 de mayo de 2002)
- Idioma: Inglés
- ISBN-10: 0071396098
- ISBN-13: 978-0071396097
- Clasificación en los más vendidos de Amazon: nº11.686 en Libros en idiomas extranjeros (Ver el Top 100 en Libros en idiomas extranjeros)
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3.4 de un máximo de 5 estrellas
23 opiniones
67 de 68 personas piensan que la opinión es útil
1.0 de un máximo de 5 estrellas
Dozens of errors for you to find and correct!
4 de abril de 2005
Por Michel Colman
- Publicado en Amazon.com
Formato:Tapa blanda
This book is literally full of errors and inaccuracies. While it has helped me refresh my memory a bit, one really has to be careful and critical to avoid learning wrong answers! Sometimes the given answer is even exactly the opposite of the correct answer. Some examples:
1. What is Dutch Roll?
"(...) the outer, upward-moving wing stalls and loses all lift, and therefore the wing drops."
The author doesn't have a clue of how Dutch roll works. The wing certainly does not stall, Dutch roll actually starts out as a very gentle instability. And why would the upward-moving, faster wing stall anyway? When a wing is going up, its AOA decreases! If one wing should stall, it should be the other one. Obviously, neither does.
2. The critical engine on a crosswind take-off is NOT the downwind engine. It is in fact the upwind engine. A crosswind from the left does not apply "a restoring force to the right", it in fact makes the aircraft want to turn left into the wind (weathervane effect). When he's already holding a lot of right rudder in a left crosswind (as any airline pilot should know), the author would prefer to lose the left engine?!
3. Vortex generators are not there for "preventing spanwise flow" but for making the boundary layer turbulent so it doesn't detach as early as a laminar flow. To prevent spanwise flow, winglets or fences are used.
4. "Density is defined as mass per unit of volume of a substance. By definition, a block of gas is less dense than the same size block of liquid, which is less dense than the same size block of solid".
Has the author ever wondered why ice floats, then?! "By definition", it should sink.
I could go on and on quoting other errors. There's one on every few pages.
1. What is Dutch Roll?
"(...) the outer, upward-moving wing stalls and loses all lift, and therefore the wing drops."
The author doesn't have a clue of how Dutch roll works. The wing certainly does not stall, Dutch roll actually starts out as a very gentle instability. And why would the upward-moving, faster wing stall anyway? When a wing is going up, its AOA decreases! If one wing should stall, it should be the other one. Obviously, neither does.
2. The critical engine on a crosswind take-off is NOT the downwind engine. It is in fact the upwind engine. A crosswind from the left does not apply "a restoring force to the right", it in fact makes the aircraft want to turn left into the wind (weathervane effect). When he's already holding a lot of right rudder in a left crosswind (as any airline pilot should know), the author would prefer to lose the left engine?!
3. Vortex generators are not there for "preventing spanwise flow" but for making the boundary layer turbulent so it doesn't detach as early as a laminar flow. To prevent spanwise flow, winglets or fences are used.
4. "Density is defined as mass per unit of volume of a substance. By definition, a block of gas is less dense than the same size block of liquid, which is less dense than the same size block of solid".
Has the author ever wondered why ice floats, then?! "By definition", it should sink.
I could go on and on quoting other errors. There's one on every few pages.
22 de 23 personas piensan que la opinión es útil
1.0 de un máximo de 5 estrellas
watch this book, dont take the answers for granted!
28 de mayo de 2005
Por D. Bouthoorn
- Publicado en Amazon.com
Formato:Tapa blanda
I agree with michel that there are a lot of mistakes in the book. It is good for the questions but NOT for the answers.
13 de 13 personas piensan que la opinión es útil
2.0 de un máximo de 5 estrellas
FULL of errors!
15 de mayo de 2006
Por G. C. Earle
- Publicado en Amazon.com
Formato:Tapa blanda
Great idea for the book BUT spoiled by incorrect facts and explanations on almost every page! Thus it is good if you use it for the questions but NOT the answers.
Someone (wish I had the time) needs to list all the corrections on a website (just a suggestion) for this book to be fully utilised - until the author can correct the mistakes. (if someone gets the website off the ground, I will gladly contribute correct answers)
Having said this, I am still glad I got the book for the questions and to be pointed in the right direction. If only the author would correct the answers....
Gavin
ATPL
Someone (wish I had the time) needs to list all the corrections on a website (just a suggestion) for this book to be fully utilised - until the author can correct the mistakes. (if someone gets the website off the ground, I will gladly contribute correct answers)
Having said this, I am still glad I got the book for the questions and to be pointed in the right direction. If only the author would correct the answers....
Gavin
ATPL
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