Aerodynamics Flashcards
(22 cards)
What controls the longitudinal stability of an airplane?
Elevators
Longitudinal stability is the quality that makes an airplane stable about its lateral (pitch) axis.
If an airplane is loaded to the rear of its CG range, it will tend to be unstable about its _______.
Lateral axis
At the airspeed represented by point B, what maximum performance can a pilot expect?
Maximum glide range
Point B is where the total drag is at its minimum, also known as the point of maximum L/D ratio.
If the angle of attack and other factors remain constant and the airspeed is doubled, the lift produced will be _______.
Four times greater than at the lower speed
In ground effect, if the same angle of attack is maintained, lift will _______.
Increase, and induced drag will decrease
In a coordinated turn, an increase in airspeed will _______.
Decrease the rate of turn resulting in no change in load factor
The design maneuvering speed (VA) is _______.
1.3 times the normal stalling speed
One of the main functions of flaps during approach and landing is to _______.
Provide the same amount of lift at a slower airspeed
In a coordinated turn at a constant altitude, the rate and radius of turn will _______.
Not vary for a specific angle of bank and airspeed
For a given angle of bank, the load factor in a coordinated constant-altitude turn _______.
Is constant and the stall speed increases
At an altitude of 2,000 feet AGL, how far would you expect to glide?
18,228 feet
A distance of 3 NM equals 18,228 feet.
An airplane will stall at the same _______ regardless of the attitude with relation to the horizon.
Angle of attack
On a wing, the force of lift acts perpendicular to and the force of drag acts parallel to the _______.
Flightpath
If airspeed is increased during a level turn, to maintain altitude, the angle of attack must be _______.
Decreased or angle of bank increased
An airplane leaving ground effect will experience _______.
An increase in induced drag and require more thrust
How much altitude will an airplane lose in 3 statute miles of gliding at an angle of attack of 8°?
1,320 feet
If the airspeed of an aircraft is cut in half while in level flight, parasite drag will become _______.
One-fourth as much
As the angle of bank is increased, the vertical component of lift _______.
Decreases and the horizontal component of lift increases
A load factor of 1.2 means the total load on an aircraft’s structure is 1.2 times its _______.
Gross weight
The angle of attack of a wing directly controls the _______.
Distribution of pressures acting on the wing
Longitudinal dynamic instability in an airplane can be identified by _______.
Pitch oscillations becoming progressively steeper
Which statement regarding stall speeds is correct?
Power-on stalls occur at lower airspeeds in shallower banks
