BASICS AERODYNAMICS

51問 • 1ヶ月前

Nicole

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When transitioning from straight-and-level flight to a constant airspeed climb, the angle of attack and lift

are momentarily increase and lift returns to a steady during the climb

A rectangular wing, as compared to other wing planforms, has a tendency to stall first at the

wing root, with the stall progression toward the wing tip

Longitudinal stability involves the motion of the airplane controlled by its

elevator

To hold an airplane in level flight at airspeeds from very slow to very fast, a pilot must coordinate thrust and

angle of attack

As the angle of bank is increased, the vertical component of lift

decreases and the horizontal component of lift increases

If airspeed is increased during a level turn, what action would be necessary to maintain altitude? The angle of attack

must be decreased or angle of bank increased

Longitudinal dynamic instability in an airplane can be identified by

pitch oscillations becoming progressively steeper

Why is it necessary to increase back elevator pressure to maintain altitude during a turn? To compensate for the

loss of the vertical component of lift an the increase in centrifugal force

While maintaining a constant angle of bank and altitude in a coordinated turn, an increase in airspeed will

decrease the rate of turn resulting in no change in load factor

Lift on a wing is most properly defined as the

force acting perpendicular to the relative wind

In theory, if the airspeed of an aircraft in level flight is cut in half while in level flight, parasite drag will become

one fourth as much

The angle of attack at which a wing stalls remains constant regardless of

weight,dynamic,pressure,bank angle,or pitch attitude

Which is true regarding the forces acting on an aircraft in a steady-state descent? The sum of all

forward forces is equal to the sum of all rearward forces

if the same angle of attack is maintained in ground effect as when out of ground effect,lift will

increase, and induced drag will decrease

To maintain a standard rate turn as the airspeed increases, the bank angle of the aircraft will need to

increase

As the angle of bank is increased, the vertical component of lift

decrease and the horizontal component of lift increases

If an airplane category is listed as utility, it would mean that this airplane could be operated in which of the following maneuvers?

limited acrobatics,including spins ( if approved)

If an airplane is loaded to the rear of its CG range, it will tend to be unstable about its

lateral axis

An airplane will stall at the same

angle of attack regardless of the attitude with relation to the horizon

The angle of attack of a wing directly controls the

distribution of pressure acting on the wing

In small airplanes, normal recovery from spins may become difficult if the

CG is too far rearward and rotation is around the CG

(Refer to Figure 2.) Select the correct statement regarding stall speeds. The airplane will stall

10 KNOTS higher in a power-on 60* bank with fear and flaps up than with gear and flaps down

An airplane leaving ground effect will

experience an increase in induced drag and requires more thrust

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

stay above its final app flight path all the way to Touchdown

choose the correct statement regarding wake turbulence.

the primary hazard is loss of control because of induced roll

To maintain a standard rate turn as the airspeed increases, the bank angle of the aircraft will need to

increase

(Refer to Figure 4.) What is the stall speed of an airplane under a load factor of 2 Gs if the unaccelerated stall speed is 60 knots?

84 KT

(Refer to Figure 5.) What does the intersection of the dashed line at point C represent?

While executing a 60 degree level turn, your aircraft is at a load factor of 2.0. What does this mean?

the total load on the aircraft structure is two times it’s weight

What performance is characteristic of flight at maximum lift/drag ratio in a propeller-driven airplane? Maximum

range and maximum distance glide

(Refer to Figure 5.) The vertical line from point E to point F is represented on the airspeed indicator by the

upper limit of the yellow arc

Which maximum range factor decreases as weight decreases?

airspeed

To produce the same lift while in ground effect as when out of ground effect, the airplane requires

a lower angle of attack

If the airplane attitude initially tends to return to its original position after the elevator control is pressed forward and released, the airplane displays

positive static stability

One of the main functions of flaps during the approach and landing is to

provide the same amount of lift at a slower airspeed

What changes in airplane longitudinal control must be made to maintain altitude while the airspeed is being decreased?

increase the angle of attack to compensate for the decreasing lift

Which is correct with respect to rate and radius of turn for an airplane flown in a coordinated turn at a constant altitude?

for the specific angle of bank and airspeed,the rate and radius of turn will not vary

If the airspeed is increased from 90 knots to 135 knots during a level 60° banked turn, the load factor will

remain the same but the radius of turn will increase

Refer to Figure 5.) The horizontal dashed line from point C to point E represents the

positive limit load factor

A sweptwing airplane with weak static directional stability and increased dihedral causes an increase in

Dutch roll tendency

(Refer to Figure 4.) If an aircraft with a gross weight of 2,000 pounds was subjected to a 60° constant-altitude bank, the total load would be

4,000 pounds

If the airspeed is decreased from 98 knots to 85 knots during a coordinated level 45 degree banked turn, the load factor will

remain the same , but the radius of turn will be decrease

While holding the angle of bank constant in a level turn, if the rate of turn is varied the load factor would

remain constant regardless of air density and the resultant lift vector

A propeller rotating clockwise as seen from the rear, creates a spiraling slipstream. The spiraling slipstream, along with torque effect, tends to rotate the airplane to the

left around the vertical axis and to the left around the longitudinal axis

Which is true regarding the force of lift in steady, unaccelerated flight?

there is a corresponding indicated airspeed required for every angle of attack to generate sufficient lift to mantein altitude

If the airplane attitude remains in a new position after the elevator control is pressed forward and released, the airplane displays

neutral longitudinal static stability

In theory, if the airspeed of an airplane is doubled while in level flight, parasite drag will become

four times grater

Which statement is true, regarding the opposing forces acting on an airplane in steady-state level flight?

these forces are equal

The stalling speed of an airplane is most affected by

variations in airplane loading

By changing the angle of attack of a wing, the pilot can control the airplane's

lift , airspeed and drag

To avoid possible wake turbulence from a large jet aircraft that has just landed prior to your takeoff, at which point on the runway should you plan to become airborne?

past the point where the jet touched down

Weekly Test 1

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Weekly Test 1