# Shared Flashcard Set

## Details

Aeronautical Science Managment
Midterm-Module 2
66
Aviation
02/19/2011

Term
 The three axes of an aircraft intersect at the
Definition
 Center of gravity
Term
 (Refer to figure 1 below) The acute angle A is the angle of
Definition
 Attack
Term
 The angle between the chord line of an airfoil and the relative wind is known as the angle of
Definition
 Attack
Term
 The purpose of aircraft wing dihedral angle is to
Definition
 The purpose of dihedral is to improve lateral stability.
Term
 Which statement relates to Bernoulli's principle?
Definition
 Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface.
Term
 The resistance, or skin friction, due to the viscosity of the air as it passes along the surface of a wing is called
Definition
 Profile Drag
Term
 The use of a slot in the leading edge of the wing enables an airplane to land at a slower speed because it
Definition
 it changes the camber of the wing
Term
 The term 'angle of attack' is defined as the angle
Definition
 between the airfoil chord line and the relative wind
Term
 Which statement relates to Bernoulli's principle?
Definition
 Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface.
Term
 During an approach to a stall, an increased load factor will cause the airplane to
Definition
 Stall at a higher airspeed
Term
 (Refer to figure 68 below) The horizontal dashed line from point C to point E represents the
Definition
 B) positive limit load factorFigure 68 is a VG diagram. The line C to E represents the maximum load factor for the airplane. Flight beyond this may cause structural damage.
Term
 Which is the best technique for minimizing the wing-load factor when flying in severe turbulence?
Definition
 Set power and trim to obtain an airspeed at or below maneuvering speed, maintain wings level, and acceptvariations of airspeed and altitude
Term
 Which is the best technique for minimizing the wing-load factor when flying in severe turbulence?
Definition
 Setpowerandtrimtoobtainanairspeedatorbelowmaneuveringspeed,maintainwingslevel,andaccept variations of airspeed and altitude.
Term
 (Refer to figure 19 below) At which angle of attack does the airplane travel the maximum horizontal distance per foot of altitude lost?
Definition
 6 Degrees
Term
 In what flight condition is torque effect the greatest in a single-engine airplane?
Definition
 Low airspeed, high power, high angle of attack
Term
 An airplane has a normal stalling speed of 60 knots but is forced into an accelerated stall at twice that speed. What maximum load factor will result from this maneuver?
Definition
Term
 An airplane has a normal stalling speed of 60 knots but is forced into an accelerated stall at twice that speed. What maximum load factor will result from this maneuver?
Definition
Term
 (Refer to figure 25 below) What would be the indicated stall speed in a 60° banked turn with the gear and flaps up?
Definition
Term
 When does P-factor cause the airplane to yaw to the left?
Definition
Term
 Which basic flight maneuver increases the load factor on an airplane as compared to straight-and-level flight?
Definition
 Turns
Term
 (Refer to figure 18 below) A 70 percent increase in stalling speed would imply a bank angle of
Definition
Term
 The angle of attack at which an airfoil stalls will
Definition
 remain the same regardless of gross weight.
Term
 As airspeed increases in level flight, total drag of an aircraft becomes greater than the total drag produced at the maximum lift/drag speed because of the
Definition
Term
 (Refer to figure 2 below) 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?
Definition
Term
 (Refer to figure 2 below) 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?
Definition
Term
 (Refer to figure 20 below) At the airspeed represented by point A, in steady flight, the aircraft will
Definition
Term
 The left turning tendency of an airplane caused by P-factor is the result of the
Definition
 propeller blade descending on the right, producing more thrust than the ascending blade on the left.
Term
 What determines the longitudinal stability of an airplane?
Definition
 The location of the CG with respect to the center of lift.
Term
 Baggage weighing 90 pounds is placed in a normal category airplane's baggage compartment which is placarded at 100 pounds. If this airplane is subjected to a positive load factor of 3.5 G's, the total load of the baggage would be
Definition
Term
 (Refer to figure 18 below) What is the stall speed of an airplane under a load factor of 4 if the unaccelerated stall speed is 70 knots?
Definition
Term
 What must a pilot be aware of as a result of ground effect?
Definition
 Induced drag decreases; therefore, any excess speed at the point of flare may cause considerable floating.
Term
 An aircraft wing is designed to produce lift resulting from
Definition
Term
 What effect, if any, does high humidity have on aircraft performance?
Definition
 It decreases performance.
Term
 If severe turbulence is encountered, the aircraft's airspeed should be reduced to
Definition
 maneuvering speed.
Term
 Maximum gliding distance of an aircraft is obtained when
Definition
 induced drag and parasite drag are equal.
Term
 The direct cause of every stall is excessive
Definition
 angle of attack
Term
 When are the four forces that act on an airplane in equilibrium?
Definition
Term
 Propeller slip is the difference between the
Definition
 geometric pitch and the effective pitch of the propeller.
Term
 Changes in the center of pressure of a wing affect the aircraft's
Definition
 lifting capacity
Term
 During the transition from straight-and-level flight to a climb, the angle of attack is increased and lift
Definition
Term
 As a result of gyroscopic precession, it can be said that any
Definition
 yawing around the vertical axis results in a pitching moment.
Term
 If an increase in power tends to make the nose of an airplane rise, this is the result of the
Definition
Term
 What force makes an airplane turn?
Definition
 The horizontal component of lift.
Term
 An airplane said to be inherently stable will
Definition
 require less effort to control.
Term
 Lift on a wing is most properly defined as the
Definition
Term
 Which action will result in a stall?
Definition
Term
 As altitude increases, the indicated airspeed at which a given airplane stalls in a particular configuration will
Definition
Term
 The angle of attack at which an airplane wing stalls will
Definition
Term
 What is the relationship of lift, drag, thrust, and weight when the airplane is in straight-and-level flight?
Definition
 Lift equals weight and thrust equals drag.
Term
 The tendency of an aircraft to develop forces which restore it to its original condition, when disturbed from a condition of steady flight, is known as
Definition
Term
 If the aircraft's nose initially tends to return to its original position after the elevator control is pressed forward and released, the aircraft displays
Definition
Term
 A propeller rotating clockwise, as seen from the rear, creates a spiraling slipstream that tends to rotate the aircraft to the
Definition
 left around the vertical axis, and to the right around the longitudinal axis.
Term
 What causes an airplane (except a T-tail) to pitch nose down when power is reduced and controls are not adjusted?
Definition
Term
 The four forces acting on an airplane in flight are
Definition
 lift, weight, thrust, and drag.
Term
 An airplane said to be inherently stable will
Definition
Term
 Why does increasing speed also increase lift?
Definition
Term
 Load factor is the lift generated by the wings of an aircraft at any given time
Definition
Term
 During a steady climb, the angle of climb depends on
Definition
 excess thrust.
Term
 What is the relationship of lift, drag, thrust, and weight when the airplane is in straight-and-level flight?
Definition
 Lift equals weight and thrust equals drag.
Term
 As airspeed decreases in level flight below that speed for maximum lift/drag ratio, total drag of an airplane
Definition
 increases because of increased induced drag.
Term
 If the aircraft's nose remains in the new position after the elevator control is pressed forward and released, the aircraft displays
Definition
Term
 The reason for variations in geometric pitch (twisting) along a propeller blade is that it
Definition
Term
 The tendency of an aircraft to develop forces that further remove the aircraft from its original position, when disturbed from a condition of steady flight, is known as
Definition
Term
 An airplane would have a tendency to nose up and have an inherent tendency to enter a stalled condition when the center of pressure is
Definition
Term
 The capability of an aircraft to respond to a pilot's inputs, especially with regard to flight path and attitude, is
Definition
Term
 The need to slow an aircraft below VA is brought about by the following weather phenomenon:
Definition
 Turbulence which causes an increase in stall speed.
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