124 extender Flashcards
is defined as the study of any motion of object in the air and all the forces acting on it. The definition
of Aerodynamics in this course is divided into two sections.
AeroDynamics
Aerodynamics in this course is divided into two sections. The first one being “——————.” and the other is defines “————-.”
The study any motion of object in the air
all the forces acting on it
A branch of study incorporated to aerodynamics is also known as ——–
Aeronautics
The parameters of the atmosphere are known as the
Pressure, Temperature, Density
is defined as the weight of the air molecules present in the atmosphere
Pressure
As the altitude of the outside the aircraft increases pressure?
Decreases
Pressure at Standard Sea Level Conditions 1 atm
14.7psi
2116.8psf
29.92” Hg
101325pa
1013.25hpa
101.325kpa
Temperature at Standard Sea Level Conditions (To) are as follows
15 C, 59F, 288k, 519R
s the amount of air molecules present in the atmosphereD
Density
is a rate of change in temperature observed while moving upward through the earth’s
atmosphere (Troposphere)
Lapse Rate
Lapse rate constant values:
-0.003566 R/ft
-0.00651K/m
-6.51k/km
is also defined as negative of temperature gradient in the atmosphere.
Lapse rate
a force that is always directed toward the center of the earth.
weight
the upward force which causes the aircraft to fly or to keep the aircraft up in the air.
Lift
The theory states that airfoils are shaped with the upper surface longer than the bottom. The air molecules have
farther to travel over the top of the airfoil than along the bottom
Equal transit theory
As the wing moves through the air, the airflow will be divided to flow over and under the wing.
When there is a positive angle between the wing and the direction of the airstream, the air is forced
to change direction.
Coanda Effect Theory
Types of drag
Parasite drag - skin friction, form, interference.
Induced drag
friction of a fluid against the
surface of an object that is moving
through it.
Skin friction
caused by the frontal area of the airplane
components being exposed to the airstream.
Form drag
describes the undesirable but unavoidable by product of lift.
Induced drag
What are the three primary flight controls systems
Ailerons
Rudders
Elevator
control roll about the longitudinal axis. The
ailerons are attached to the outboard trailing edge of
each wing and move in the opposite direction of the
other.
Ailerons
are connected by cables, bell cranks, pulleys
and/or push - pull tubes to a control wheel or control
stick.
Ailerons
In aileron
Moving the control stick to the right, right
aileron –, left aileron —, roll to the —-.
Left down
RIght up
Right Roll
