Airplanes and aerodynamics Flashcards
What is the purpose of wing Flaps?
To enable the pilot to make steeper approaches to a landing without increasing airspeed.
One of the main functions of flaps during approach and landing is to
increase the angle of descent without increasing the airspeed.
what is the purpose of rudder on an airplane?
To control yaw.
Which is not a primary flight control surface?
A. flaps.
B. Stablitator
C. Ailerons
Flaps
The elevator controls movement around which axis?
Lateral
Which statement is true concerning primary flight controls?
A. The effectiveness of each control surface increases with speed because there is more airflow over them.
B. Only when all three primary flight controls move In sequence do the airflow and pressure distribution change over and around the airfoil
C.Primary flight controls include ailerons ,rudder and trim systems.
A. The effectiveness of each control surface increases with speed because there is more airflow over them.
Which of the following is true concerning flaps?
A. flaps are attached tp the leading edge of the wing and are used to increase wing lift
B.flaps allow an increase in the angle of descent without increasing airspeed.
C.Flaps are high drag devices deployed from the wings to reduce lift
B.flaps allow an increase in the angle of descent without increasing airspeed.
Which is A secondary flight control?
A. Spoiler
B.Ailerons
C.Stabliatiors
Spoilers
Trim systems are designed to do what?
They relieve the pilot of the need to maintainability constant pressure on the flight controls
The four forces acting on an airplane in flight are
Lift, Weight, Thrust, and Drag
When are the four forces in flight equilibrium?
During unaccelerated level flight
what is the relationship of lift, drag, thrust ], and weight when the airplane is in straight and level flight?
Lift equals weight and thrust equals drag
what is brenoullis principle?
Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface
What is angle of attack?
The angle between the relative wind and the wing chord line
The angle of attack at which an airplane stalls will
remain the same regardless of gross weight
as altitude increases, the indicated airspeed at which a given airplane stalls in a particular Configuration will
remain the same regardless of altitude
in what flight condition must an airplane be placed in order to spin?
stalled
During a spin to the left, which wing is stalled?
Both wings are stalled
What is ground effect?
The result of the interference of the surface of the earth with the airflow patterns about an airplane
Floating caused by ground effect will be most realized during an approach to land when at
less than the length of the wingspans above the surface
aircraft leaving ground effect during takeoff will
experience an increase in induced drag and a decrease in performance
becoming airborne before reaching recommenced takeoff speed is due to
Ground effect
what force makes an airplane turn?
The horizontal component of lift
What determines the longitudinal stability of an airplane?
The location of the CG with respect to the center of lift
An airplane said to be inherently stable will
require less effort to control
changes in the center pressure of a wing affect the aircrafts
Aerodynamic balance and controllability
An airplane has been loaded in such a manner that the CG Is located aft of the aft CG limit. One under desirable flight characteristic a lot might experience with this airplane would be
Difficulty in recovering from a stalled position
What cause an airplane to Pitch nose down when the power is reduced and controls are not adjusted
The downwash on the elevators from the propeller slipstream is reduced and elevator effectiveness is reduced
what is the effect of advancing the throttle in flight
both aircraft groundspeed and angle of attack will increase
loading an airplane to the most aft CG will cause the airplane to be
less stable all speeds
an airplane loaded with the CG rear of the aft CG limit could
increase the likelihood of in advent over stress
in what flight conditions are torque effects more pronounced in a single-engine airplane
low speed, high power, high angle of attack
the left turning tendency of an airplane caused by P-factor is the result of the
propeller blade descending on the right, producing more thrust than the ascending blade on the left.
when does P-factor cause the airplane to yaw to the left?
When at high angles of attack
which basic flight maneuver increase the load factor on an airplane as compared to straight and level flight?
turns
The amount of excess load that can be applied on the wing of an airplane depends upon the
speed of the airplane
During an approach to a stall, an increased load factor will cause the airplane to
stall at a higher speed
Structural damage or failure is more likely to occur in smooth air at speeds above
VNE
limit load factor is the ratio of
Maximum sustainable load to the gross weight of the plane
