Aerodynamics Flashcards
(Refer to Figure 2.) If an airplane weighs 3,300 pounds, what approximate weight would the airplane structure be required to support during a 30° banked turn while maintaining altitude?
3,960 pounds.
What is the purpose of the rudder on an airplane?
To control yaw.
If an emergency situation requires a downwind landing, pilots should expect a faster
groundspeed at touchdown, a longer ground roll, and the likelihood of overshooting the desired touchdown point.
(Refer to figure 62.) In flying the rectangular course, when would the aircraft be turned less than 90°?
Corners 1 and 4.
Changes in the center of pressure of a wing affect the aircraft’s
aerodynamic balance and controllability.
The amount of excess load that can be imposed on the wing of an airplane depends upon the
speed of the airplane.
What force makes an airplane turn?
The horizontal component of lift.
QUESTION
(Refer to figure 66.) While practicing S-turns, a consistently smaller half-circle is made on one side of the road than on the other, and this turn is not completed before crossing the road or reference line. This would most likely occur in turn
4-5-6 because the bank is increased
too rapidly during the early part of the turn.
Select the four flight fundamentals involved in maneuvering an aircraft.
Straight-and-level flight, turns, climbs, and descents.
During a spin to the left, which wing(s) is/are stalled?
Both wings are stalled.
The term angle of attack is defined as the angle between the
chord line of the wing and the relative wind.
An airplane said to be inherently stable will
require less effort to control.
The angle of attack at which an airplane wing stalls will
remain the same regardless of gross weight.
(Refer to Figure 2.) If an airplane weighs 2,300 pounds, what approximate weight would the airplane structure be required to support during a 60° banked turn while maintaining altitude?
4,600 pounds.
What determines the longitudinal stability of an airplane?
The location of the CG with respect to the center of lift.
As altitude increases, the indicated airspeed at which a given airplane stalls
in a particular configuration will
remain the same regardless of altitude.
Loading an airplane to the most aft CG will cause the airplane to be
less stable at all speeds.
What is one purpose of wing flaps?
To enable the pilot to make steeper approaches to a landing without increasing the airspeed.
When are the four forces that act on an airplane in equilibrium?
During unaccelerated flight.
What causes an airplane (except a T-tail) to pitch nosedown 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.
(Refer to Figure 1.) The acute angle A is the angle of
attack.
When executing an emergency approach to land in a single-engine airplane, it is important to maintain a constant glide
speed because variations in glide speed
nullify all attempts at accuracy in
judgment of gliding distance and landing spot.
In what flight condition must an aircraft be placed in order to spin?
Stalled.
During an approach to a stall, an increased load factor will cause the airplane to
stall at a higher airspeed.
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.
Which statement relates to Bernoulli
s principle?
Air traveling faster over the curved
upper surface of an airfoil causes lower pressure on the top surface.
The four forces acting on an airplane in flight are
lift, weight, thrust, and drag.
The term ‘angle of attack’ is defined as
the angle
between the wing chord line and the relative wind.
Which basic flight maneuver increases the Load factor on an airplane as compared to straight-and-level flight?
Turns.
(Refer to Figure 2.) If an airplane weighs 4,500 pounds, what approximate weight would the airplane structure be required to support during a 45° banked turn while maintaining altitude?
6,750 pounds.
The angle between the chord line of an airfoil and the relative wind is known the angle of
attack.
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.
One of the main functions of flaps during approach and landing is to
increase the a diese descent without increasing the airspeed
