Flaps

#Purpose of flaps
=Increase descent angle without increase in airspeed

ex) One of the main functions of flaps during approach and landing is to

=increase the angle of descent without increasing the airspeed.

ex)What is one purpose of wing flaps?
=To enable the pilot to make steeper approaches to a landing without increasing the airspeed.

 

Angle of Attack

#Angle of Attack

=an acute angle “A”
=the angle between chord line and relatively wind

#Stall
When there is a critical Angle of attack,
lift is destroyed and  no longer air conforms on the surfce of the wing.

ex)The angle of attack at which an airplane wing stalls will remain the same regardless of gross weight

ex)The indicated airspeed at wich a given airplane stalls will remain the same regardless of altitude.

ex)At hight altitude the stall speed is the same.

Aerodynamics

#4 Aerodynamic forces
=Thrust, Drag, Lift, Weight

ex)The four forces acting on an airplane in flight are
Lift, Weight, Thrust, and Drag

#Unaccelerated Flight
=Not changing speed and direction

ex)When are the four forces that act on an airplane in equilibrium?
During unaccelerated flight.

#In Equalibrium during unaccelerated Flight
Thrust=Drag
Lift=Weight

#Straight and level Flight

Thrust=Drag
Lift=Weight

The Enlightenment

Next year, I entered into Hankuk University of Foreign Studies and dreamed of such a romantic campus life. It was literally just a dream. My seniors by a year or two years welcomed my peers and me, new freshmen, and we hung out altogether and drank. It seemed that we wanted to get compensated by hard work during 12 years of study, and we always idled our time away as busy as a hen and one chicken. All the students in my department drank, danced and sang, as we skipped some classes despite expensive tuition. While thinking that this would go wrong, I could not manage to get out of the life because I was afraid of being leaving out alone from my peer group. So, I just followed my friends. Toward the end of the first semester, I felt like I would not let my life go wrong any more and decided to stop wasting my precious time. Then, I left my frolicking days behind for a library and started reading books.

I found a book by chance. It was a motivational personal development and self-help book entitled, “Think and Grow Rich,” written by Napoleon Hill. The author interviewed Andrew Carnegie and was inspired by Mr. Carnegie’s law of success. After that, he studied the characteristics of a large number of individuals who achieved great wealth during their lifetimes. And, in the book he introduced 16 laws of success, which can be applied to anyone through autosuggestion. At the time, I was absolutely riveted by the story of the book and chewed over the lessons in my mind. It was the moment of enlightenment. I was shocked that I found out the truth I did not know and made a resolution to live my way although it would be a solitary life.