Ch 1 - Airplanes & Aerodynamics - Questions 1 - 48 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 the movements around which axis?
Lateral.
Which statement is true concerning primary flight controls?
The effectiveness of each control surface increase with speed because there is more airflow over them.
Which of the following is true concerning flaps?
Flaps allow an increase in the angle of descent without increasing airspeed.
Which device is a secondary flight control?
Spoilers.
Trim systems are designed to do what?
They relieve the pilot of the need to maintain contact pressure on the flight controls.
The 4 forces acting in on an airplane in flight are
Lift, weight, thrust, drag.
When are the four forces that act on an airplane in 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.
Which statement related to Bernoulli’s principle?
Air travelling 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
chord line of the wing and the relative wind.
The angle between the chord line 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 the 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 much an aircraft be placed in order to spin?
Stalled.
During a spin to the left, which wing(s) is/are 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 cause by the phenomenon of ground effect will be most caused during an approach to land when at
Less than the length of the wingspan above the surface.
What must a pilot be aware if as a result of ground effect?
Induced drag decrease: therefore, any excess speed at the point of flare may cause considerable floating.
An aircraft leaving ground effect during takeoff will
Experience an increase in induced drag and decrease in performance.
Ground Effect is most likely to result in which problem?
Becoming airborne before reaching recommended takeoff speed.
What component 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 centre of lift.
An airplane said to be inherently stable will
Require less effort to control.
Changes in the centre of 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 undesirable flight characteristic a pilot might experience with this airplane would be
Difficulty recovering from a stalled condition.
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.
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 at all speeds.
An airplane loaded with the Center of Gravity (CG) rear of the aft limit could
Increase the likelihood of inadvertent overstress.
In what flight conditions are torque effects more pronounced in a single-engine airplane?
Low airspeed, high power, high angle of attack.
The left turning tendency of an airplane cause by the 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 the P - factor cause the plane to yaw to the left?
When at HIGH angles of attack.
Which basic flight maneuver increases the load fact on an airplane as compared to straight-and-level flight?
Turns.
The amount of excess land that can be imposed on the wing of an airplane depends upon the
Speed of the airplane.
During an approach to a stall, an increased land factor will cause the aircraft to
Stall at a higher airspeed.
Structural damage or failure is more likely to occur in smooth air at speeds above
Vne.
Limit land factor is the ratio of
Maximum sustainable load to the gross weight of the airplane.
