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BGSU > Aircraft Stability - Final 4040 > Flashcards

Aircraft Stability - Final 4040 Flashcards

1
Q

What are the two types of stability?
dynamic
active
static
symmetric

A

dynamic
static

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2
Q

What is the greatest contributor to the positive yaw stability of an aircraft?
wings
fuselage
vertical sabilizer

A

vertical stablizer

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3
Q

The method by which an object oscillates over time after it has been disturbed is called ________.

Symmetric Stability

Static Stability

Dynamic Stability

Active Stability

A

dynamic stability

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4
Q

An object that has an initial tendency to return to its equilibrium position is said to have _________.

Negative Dynamic Stability

Positive Dynamic Stability

Positive static stability

Neutral Static Stability

A

positive static stability

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5
Q

Wings are a _________ contributor to an aircrafts yaw stability. The fuselage is a _________ contributor.

Negative / Negative

Negative / Positive

Positive / Negative

Positive / Positive

A

positive negative

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6
Q

Adverse yaw is the tendency for an aircraft to yaw _______ its direction of roll. Provers roll is the tendency of an aircraft to roll _____________ the direction of its yaw.

away from / toward

away from / away from

toward / away from

toward / toward

A

away from / toward

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7
Q

The motion of an object displaying neutral dynamic stability is called ___________.

Divergent Oscillation

Damped Oscillation

Undamped Oscillation

Undamped Oscillation

A

Undamped Oscillation

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8
Q

The velocities below max endurance airspeed is known as __________. Airspeed in this region is _________.

the region of reverse command / stable

the region of normal command / stable

the region of normal command / unstable

the region of reverse command / unstable

A

the region of reverse command / unstable

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9
Q

The motion of an object displaying positive dynamic stability is called ___________.

Damped Oscillation

Divergent Oscillation

Undamped Oscillation

A

damped oscillation

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10
Q

With an airplane, what is the opposite of stability

Vibration

Maneuverability

Oscillation

Uncontrollability

A

maneuverability

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11
Q

Anhedral wings are a ____________ contributor to lateral stability.
positive
neutral
negative

A

negative

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12
Q

High mounted wings are _________ contributors of lateral stability. Low mounted wings are a _______ contributor.

Negative / Negative

Positive / Positive

Positive / Negative

Negative / Positive

A

Positive / Negative

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13
Q

For positive longitudinal stability, the aerodynamic center of a wing should be _________ of the center of gravity
forward
aft

A

aft

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14
Q

An object with positive static stability can have any type of dynamic stability.
true
false

A

true

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15
Q

If an object is dynamically unstable it will never return to its original equilibrium position.
true
false

A

true

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16
Q

The initial tendency for an object to accept its displacement position as its new equilibrium position is called _______.

Positive Dynamic Stability

Neutral Static Stability

Negative Dynamic Stability

Positive Static Stability

A

neutral static stability

17
Q

The motion of an object displaying negative dynamic stability is called ___________.

Divergent Oscillation

Undamped Oscillation

Damped Oscillation

A

Divergent Oscillation

18
Q

In airplanes, lateral stability concerns movement about the
lateral axis
longitudinal axis
yaw axis

A

Longitudinal axis

19
Q

Swept wings tend to move an aircraft’s aerodynamic center forward.
true
false

A

false

20
Q

Once the CG is aft of the neutral point, the aircraft becomes statically unstable.
true
false

A

true

21
Q

Stability is the tendency of an object to return to it’s state of equilibrium once disturbed from it.
true
false

A

true

22
Q

The initial tendency for an object to move toward or away from its original equilibrium position is called _______.

Static stability

Active Stability

Dynamic Stability

Symmetric Stability

A

static stability

23
Q

The tendency for an object to display greater and greater oscillations after its initial displacement is called _______.

Neutral Static Stability

Negative Dynamic Stability

Positive Dynamic Stability

Positive Static Stability

A

negative dynamic stability

24
Q

An object can have positive dynamic stability without having positive static stability
true
false

A

false

25
Q

What can be done to increase an aircraft’s maneuverability?

Use fly by wire technology for the actuation of flight controls

Design an aircraft with large control surfaces

Use hydraulically actuated flight controls

Design an aircraft with weak stability

A

Design an aircraft with large control surfaces
Design an aircraft with weak stability

26
Q

An aircraft with a large moment arm between the CG and the aerodynamic center of the horizontal stabilizer requires a large horizontal stabilizer.
true
false

A

false

27
Q

What is the location of the CG along the longitudinal axis where neutral static stability is called?

The balance point

The aerodynamic center

The fulcrum

The neutral point

A

the neutral point

28
Q
A

BGSU (27 decks)

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