Airplanes And Aerodynamics Flashcards
What is one purpose of wing flaps?
To enable the pilot to make steeper approaches to a landing without increasing the 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 the rudder on an airplane?
To control yaw
Which is not a primary flight control surface?
Flaps
The elevator controls movement around which axis
Lateral
Which device is a secondary flight control
(Spoilers)
Ailerons
Stabilator
Trim systems are designed to do what?
They relieve the pilot of the need to maintain constant back 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 that act on the airplane in equilibrium
During an unaccelerated level flight
What is the relationship of left drag thrust and wait on the airplane is a straight and level flight?
Left equals weight and thrust equals drag
Which is Bernoulli’s principle?
Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface
The term angle of attack is defined as the angle between the
Cord line of the wing and relative wind
Angle of attack is defined as the angle between the core line of an airfoil and
Direction of the relative wind
The angle between the Carline of an airfoil and the relative wind is known as the angle of
Attack
The angle of attack at which an airplane wing stalls will?
Remain the same regardless of gross weight
As altitude increases the indicated airspeed at which a given airplay stalls in a particular configuration will?
Will Remain the same regardless of altitude
In what flight condition must an aircraft be placed an order to spin?
Stalled
How will frost on the wings of an airplane affect takeoff performance?
Frost will disrupt the smooth flow of air over the wing adversely affecting it’s from lifting capability
Why is frost considered hazardous to flight?
Frost spoils the smooth flow of air over the wings thereby decreasing lifting capability
How does frost affect the lifting surface of an airplane on Takeoff?
Frost may prevent the airplane from becoming airborne at normal Takeoff speed
What is ground effect?
The result of the interference of the surface of the earth with the air flow patterns about an airplane
Floating caused by the phenomenon of ground effect will be most realized during an approach to land at
Less than the length of the wingspan above the surface
What must a pilot be aware of as a result of ground effect?
Induced drag decreases therefore any excess speed at the point of flair may cause considerable floating
An aircraft leaving grand affect during Takeoff will
Require an increase in angle of attack to maintain the same lift coefficient
Ground effect is most likely to result in which problem?
Becoming airborne before reaching recommend take off speed
What force makes an airplane turn?
The horizontal component of lift
An airplane said to be inherently stable will?
Require less effort to control
What determines the longitudinal stability of an airplane
The location of the CG with respect to the center of lift
Changes in the center of pressure of a wing affect the Aircraft’s
Arrow dynamic balance and controllability
An airplane has been loaded in such a manner that the CG is located aft of the aft CG limit. one undesirable flight characteristic a pilot might experience with this airplane would be?
Difficulty in recovering from a stalled condition
What causes an airplane to pitch nose down when power is reduced and controls are not adjusted?
The downwash on the elevators from the propeller slipstream is reduced and elevator effectiveness is reduced
Loading an airplane to the most aft CG will cause the airplane to be
Less stable at all speeds
What is the effect of advancing the throttle in flight?
Both aircraft ground speed and angle of attack will increase
In what flight condition are torque affects more pronounced in a single engine airplane?
Low air speed, high power, high angle of attack
The left turning tendency of an airplane causedby P-factor is the result of the
Propeller blade descending on the right producing more threats than the asending blade on the left
When does P-factor cause the airplane to yall to the left?
When at high angles of attack
The amount of excess load imposed on the wing airplane depends upon the?
Speed of the airplane
Which basic flight maneuver increases the load factor on an airplane as compared to straight and level flight?
Turns
During an approach to a stall an increased load factor will cause the aircraft to.
Stall at a higher airspeed
