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Private Pilot Ground School > Basic Aerodynamics > Flashcards

Basic Aerodynamics Flashcards

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Charter Pilot (Part 135) - Oral flashcards
1
Q

The acute angle of figure “A” is the angle of

A

Attack

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2
Q

The term angle of attack is defined as the angle

A

between the wing cord line and the relative wind

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3
Q

The angle of the wing cord line of an airfoil and the relative wind is the angle of

A

attack

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4
Q

The term angle of attacking defined by the angle between the

A

cord of the wing and relative wind

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5
Q

The angle of attack at which an airfoil stalls will

A

remain the same regardless of gross weight

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6
Q

What is the effect of advancing the throttle in flight

A

airspeed will remain relatively consistent but the aircraft will climb

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7
Q

What is Bernoulli’s principal

A

air traveling faster over a curved surface will cause pressure to decrese

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8
Q

Four forces acting on an airplane in flight are

A

lift, weight, thrust, and drag

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9
Q

What is the relationship of lift, drag, thrust, and weight when an airfoil is in straight and level flight

A

lift equals weight and thrust equals drag

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10
Q

When are the four forces of flight in equilibrium

A

during unaccelerated flight

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11
Q

The best speed to use for a glide is one that will result in the greatest glide distance for a given amount of

A

altitude

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12
Q

Climb performance depends upon the

A

reserve power or thrust

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13
Q

(refer to figure 72) The horizontal dashed line from point C to point E represents the

A

postive load factor

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14
Q

(refer to figure 72) The vertical dashed line from point E to point F is represented on the airspeed indicator by the

A

upper limit of the yellow arc

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15
Q

An airplane that is considered to be inherently stable will

A

require less effort to control

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16
Q

What determines the longitudinal stability of an airplane

A

the location of CG with respect to the center of lift

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17
Q

What causes an airplane (except a T-Tail) to pitch nose down when power is reduced and controls are not adjusted

A

The downsplash on the elevators from the propeller slipstream is reduced and elevator effectiveness is reduced

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18
Q

AN airplane has been loaded in such a manner that the CG is located aft if the CG limit. One undesirable flight characteristic the pilot might experience with this airplane would be

A

difficulty in recovering from a stalled condition

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19
Q

(refer to figure 2) If an aircraft weighs 2300lbs what appx weight would the aircraft structure be required to support during a 60 degree bank angle turn

A

4600lbs

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20
Q

(refer to figure 2) if an airplane weighs 3300lbs what appx weight would the aircraft structure be required to support during a 30 degree bank angle turn

A

3960lbs

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21
Q

(refer to figure 2) If an airplane weighs 4500lbs what weight would that aircraft structure be required to support during a 45 degree bank turn

A

6750lbs

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22
Q

The amount of excess load that can be imposed on the wing of an airplane depends upon the

A

speed of an airplane

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23
Q

which basic maneuver in an airplane increases the load factor on the airplane as compared to straight and level flight

A

turns

24
Q

what force makes an airplane turn

A

horizontal component of lift

25
Q

during an approach to stall, an increases load factor will cause the airplane to

A

stall at a higher airspeed

26
Q

Loading an aircraft to the most aft CG will cause the airplane to be

A

less stable at all airspeeds

27
Q

Changes in the center if pressure affect the aircraft’s

A

aerodynamic balance and controllability

28
Q

Select four flight fundamentals involved in maneuvering an aircraft

A

straight and level, turns, climbs, and decent

29
Q

(refer to figure 62) In flying the rectangular course, when would the aircraft be turned less than 90 degrees?

A

Corners 1 and 4

30
Q

(refer to figure 66) While practicing S turns, a consistintlly 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,

A

4, 5, 6, because the bank is increased too rapidly during the early part of the turn

31
Q

If an emergency situation requires a downwind landing, pilots should expect a faster

A

groundspeed at touchdown, a longer ground roll, and the likelihood of overshooting the desired touchdown point

32
Q

When executing an emergency approach in a single engine airplane, it is important to maintain a constant glide speed because variations in glide speed

A

nullify attempts at accuracy in judgment of gliding distance and landing spot.

33
Q

As altitude increases, the indicated airspeed at which a given airplane stalls in a particular configuration will

A

remain the same regardless of altitude

34
Q

The direct cause of every stall is excessive

A

angle of attack

35
Q

In what flight condition must an aircraft be placed in order to spin

A

stalled

36
Q

During a spin to the left, which wing(s) is/are stalled?

A

Both wings are stalled

37
Q

The angle of attack at which an airplane wing stalls will

A

remain the same regardless of gross weight

38
Q

One of the main fun actions of flaps during an approach and landing is to

A

increase the angle of descent without increasing the airspeed

39
Q

What is the purpose of wing flaps

A

to enable the pilot to make steeper approaches to a landing without increasing the airspeed

40
Q

Ground effect is most likely to result in which problem

A

becoming airborne before reaching recommended takeoff speed

41
Q

What is ground effect

A

the result of the interference of the surface of the earth with the airflow patterns about an airplane

42
Q

Floating caused by the phenomenon of ground effect will be most realized during an approach to land when at

A

less than the length of the wingspan above the surface

43
Q

What must a pilot be aware of during ground effect

A

induced drag decreases; therefore any excess speed at the point of flare will cause considerable floating

44
Q

Which is a result of the phenomenon of ground effect

A

The angle of attack generating lift is increased

45
Q

(refer to figure 46) The airspeed range to avoid when flying in around effect is

A

40mph and above

46
Q

An aircraft leaving ground effect during takeoff will

A

experience an increase in induced drag and an increase in performance

47
Q

When landing behind a large aircraft, which procedure should be followed for vortex avoidance

A

stay above its final approach flightpath all the way to touchdown

48
Q

How does the wake turbulence vortex circle around your wingtip

A

outward, upward, and around each tip

49
Q

When taking off or landing at an airport where heavy aircraft are operating, one should be particularly alert to the hazards of wingtip vortices because this turbulence tends to

A

sink below the flightpath of an aircraft operating below the aircraft generating the turbulence

50
Q

Wingtip vortices occur only when an aircraft is

A

developing lift

51
Q

Increased vortex strength occurs when the generating aircraft is

A

heavy, clean, and slow

52
Q

Wingtip vortices created by large aircraft tend to

A

sink below the aircraft generating turbulence

53
Q

The wing condition that requires the maximum caution when avoiding wake turbulence on landing is a

A

light quartering tailwind

54
Q

When landing behind a large aircraft the pilot should avoid wake turbulence by staying

A

above aircraft final approach paths and landing beyond the large aircraft touchdown point

55
Q

When departing behind heavy aircraft, the pilot should avoid wake turbulence by maneuvering the aircraft

A

above and upwind of the heavy aircraft

56
Q

What wind condition prolongs the hazards of wake turbulence on a landing runway for the longest time

A

light. quartering tailwind

57
Q

A go around from a poor landing approach

A

is always preferable to last minute attempts to avoid a bad landing

Private Pilot Ground School (2 decks)

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