Cartes mémoires 081 POF PT (Seite 1 von 1)

Cartes-fiches	14
Langue	Deutsch
Catégorie	Technique
Niveau	Université
Crée / Actualisé	22.06.2025 / 25.06.2025
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At the stalling angle of attack the lift/drag ratio will be:

The same as at the optimum angle of attack

Lower than at the optimum angle of attack

Higher than at the optimum angle of attack

The angle of attack does not affect the lift/drag ratio

The speed for minimum sink rate in a glide, compared to the speed for maximum distance Vmd, is:

Faster than Vmd

Equal to Vmd

Slower than Vmd

Not related to Vmd

The lateral axis of an aircraft is a line which passes through the ...

centre of pressure at right angles to the direction of the airflow

quarter chord point of the wing root at right angles to the longitudinal axis

wing tip

centre of gravity, parallel to a line through the wing tip

Which combination of design features is known to be responsible for deep stall?

Straight wings and a T-tail

Swept back wings and wing mounted engines

Straight wings and aft fuselage mounted engines

Swept back wings and a T-tail

Which of the following statements about stall speed is correct?

Decreasing the angle of sweep of the wing will decrease the stall speed

Increasing the angle of sweep of the wing will decrease the stall speed

Increasing the anhedral of the wing will decrease the stall speed

Use of a T-tail will decrease the stall speed

Which statement about an aeroplane entering ground effect is correct? 1. The downwash angle decreases. 2. The induced AoA decreases.

1. is incorrect; 2. is correct

1. is correct; 2. is incorrect

1. is incorrect; 2. is incorrect

1. is correct; 2. is correct

What statement is correct about the shape of an airfoil?

The camber means the curvature of the upper surface

The ratio between the camber line and the chord is called the camber of the airfoil

The distance between the airfoil upper surface and the chord line is called camber

The chord is defined as the distance between the leading edge and trailing edge of the airfoil

For an aeroplane with one fixed value of VA the following applies. VA is ...

just another symbol for the rough air speed

the maximum speed in smooth air

the speed at which the aeroplane stalls at the manoeuvring limit load factor at MTOW

the speed at which unrestricted application of elevator control can be used, without exceeding the maximum manoeuvring limit load factor

The aerodynamic contribution to the static longitudinal stability of nacelles of aft fuselage-mounted engines is:

Maximum during cruise

Zero

Negative

Positive

The change in downwash along a wing without taper:

Reduces the adverse yaw effect in roll

Reduces damping in roll

Increases the load factor at the wing tip

Causes the stall to occur at the root first

Which of these statements about the gust load factor on an aeroplane are correct or incorrect? 1. When the slope of the lift versus the AoA curve increases, the gust load factor increases. 2. When the wing loading increases, the gust load factor increases.

1 incorrect; 2 incorrect

1 incorrect; 2 correct

1 correct; 2 correct

1 correct; 2 incorrect

For a given angle of attack, a swept wing will have ...

the same lift coefficient than an equivalent straight one

the same lateral stability than an equivalent straight one

a lower lift coefficient than an equivalent straight one

reduced lateral stability than an equivalent straight one

Which of the following increases the tendency for “Dutch roll”?

Increased static lateral stability

Decreased dihedral

Increased anhedral

Increased keel surface aft of the CG

The aerodynamic centre of the wing is the point where…

Aerodynamic forces are constant

Pitching moment coefficient does not vary with angle of attack

Change of lift due to angle of attack is constant

The lateral axis intersects the centre of gravity

081 POF PT

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