Multiple choice Flashcards
The downward force acting on an aircraft
Pull of the gravity
Acts through a point called center of gravity (CG)
Weight
Forward force produced by the powerplant
In most general aviation airplanes, or reciprocating engines generate thrust the propeller.
In larger jets airplanes, generate thrust thru the jet engines.
As the propeller or jet engine rotates, its blades accelerate the surrounding air towards the aft (to the back) of the aircraft.
According to Newton’s Third Law of Motion, this would result in the aircraft to move forward.
Thrust
Resistance to forward motion as the aircraft travels through the air
Opposite the direction of flight
Limits the forward speed of the aircraft.
Drag
Any drag that is not associated with the production of lift
Is caused by any aircraft surface which deflects or interferes with the smooth airflow around the airplane
Parasite Drag
Produced whenever the airflow passing over the aircraft separates from the surface and become turbulent.
Form Drag
Caused by intermixing currents of air around the aircraft structure
Happens where the aircraft surfaces meet each other
Interference Drag
Is caused by the roughness of the airplane’s surface
Creates small eddies which contribute to the drag
Skin-Friction Drag
also call as lift-induced drag
Produced whenever the aircraft produces lift
is a byproduct of lift
Caused by wingtip vortices affecting the downwash of the wing which tilts the lift backwards
Stronger/higher at slower speed
Induced Drag
Circular patterns of rotating air as wing generates lift
High Pressure goes to Low Pressure.
The path of least resistance is towards the wing tips, which results in the air at the bottom to move outward away from the fuselage towards the wing tips.
The air at top of has a tendency to flow inwards, towards the fuselage
Wingtip Vortices
twisting the wing to change the angle of incidence at the wing root from the angle of incidence at the wing tip
Wing Washout
= Total Drag
Parasite Drag + Induced Drag
These are attached to rear end, or what we call trailing edge, of the wing.
They extend from the midpoint of each wing to the outward tip.
They move in opposite directions to create aerodynamic forces that cause the airplane to turn.
The _ control the aircraft on its longitudinal axis.
Aileron
Aileron movement
roll movement
The _ is another flight control that is located on the empennage, but this time, it is connected on the vertical stabilizer.
They are used to move the nose of the aircraft left or right.
They are used in combination with the ailerons to turn an airplane correctly.
The _ controls the aircraft on its vertical axis.
Rudder
Rudder movement
yaw movement
