AMT 114 Flashcards
Resistance to forward motion as the aircraft
travels through the air
Drag
Is normally divided into three (3) types of Drag:
Form Drag, Interference Drag, Skin friction drag
Four Forces of Flight
Lift, Weight, Thrust, Drag
- Produced whenever the aircraft produces lift
Induced Drag
Creates small eddies which contribute to the drag.
Skin-Friction Drag
Opposite the direction of flight
Drag
The downward force acting on an aircraft
Weight
-also called as lift-induced drag
Induced Drag
Produced whenever the airflow passing over the aircraft separates from the surface and become turbulent.
Form Drag
Pull of the gravity
Weight
Varies depending on the speed of the aircraft.
Parasite Drag
Limits the forward speed of the aircraft
Drag
Acts through a point called center of gravity (CG)
Weight
- is a byproduct of lift
Induced Drag
As the aircraft’s airspeed increase, the ____ drag increase
Parasite
Caused by intermixing currents of air around the aircraft structure
Interference Drag
Rudder movement=
yaw movement
Forward force produced by the powerplant
Thrust
According to Newton’s Third Law of Motion, this
would result in the aircraft to move forward
Thrust
-Caused by wingtip vortices affecting the downwash of the wing which tilts the lift backwards.
Induced Drag
There are 2 types of Drag:
Parasite Drag, Induced Drag
-is directly proportional to the square of the airspeed
Parasite Drag
In most general aviation airplanes, or reciprocating engines generate ____ the propeller
Thrust
Is caused by any aircraft surface which deflects or
interferes with the smooth airflow around the airplane
Parasite Drag
In larger jets airplanes, it generates trust through?
Jet Engines
What Drag formula is this: Dp
=s
2
Parasite Drag
Happens where the aircraft surfaces meet each other
Interference Drag
The ___ controls the aircraft on its vertical axis.
Rudder
In most general aviation airplanes, or reciprocating engines generate thrust the?
Propeller
Any drag that is not associated with the production of lift
Parasite Drag
As the propeller or jet engine rotates, its blades
accelerate the surrounding air towards the aft (to the back) of the aircraft.
Thrust
Is caused by the roughness of the airplane’s
surface.
Skin-Friction Drag
The path of least resistance is towards the wingtips, which results in the air at the bottom to move outward away from the fuselage towards the wing tips.
Wingtip Vortices
Primary Flight Controls:
Elevator, Rudder, Ailerons
twisting the wing to change the angle of incidence at the wing root from the angle of incidence at the wing tip
Wing Washout
Stronger/higher at slower speeds.
Induced Drag
The air at top of has a tendency to flow inwards,
towards the fuselage
Wingtip Vortices
Axis of Pitch (?)
Lateral
Parasite Drag + Induced Drag=
Total Drag
They are used in combination with the ailerons to turn an airplane correctly.
Rudder
Circular patters of rotating air as wing generates
lift.
Wingtip Vortices
Axis of Roll (?)
Longitudinal
Secondary Flight Controls
Wing Flaps, Trim Tabs
Methods to Reduce Induced Drag:
-Tapering the Wing Planform
-Wing Tip Modification
-Wing Washout
High Pressure goes to Low Pressure.
Wingtip Vortices
Axis of Yaw (?)
Vertical
These are attached to rear end, or what we call
trailing edge, of the wing.
Ailerons
The ___ control the aircraft on its longitudinal axis.
Ailerons
Lateral Axis (?)
Elevator pitch
Elevator movement=
Pitch Movement
It is used to move the aircraft up or down, and allows the aircraft to climb, descend, or maintain its desired altitude.
Elevator
They move in opposite directions to create aerodynamic forces that cause the airplane to turn.
Ailerons
Vertical Axis (?)
Rudder Yaw
The ____ control the aircraft on its lateral axis.
Elevator
Longitudinal Axis (?)
Aileron Roll
is attached to the horizontal stabilizer which is located on the empennage of the aircraft.
Elevator
They extend from the midpoint of each wing to the outward tip.
Ailerons
The ____ is another flight control that is
located on the empennage, but this time, it is
connected on the vertical stabilizer.
Rudder
Aileron movement=
Roll movement
They are used to move the nose of the aircraft
left or right.
Rudder
