6 Quiz STALL

If an aircraft normally stalls at 30 kts, what airspeed will it stall at during a pullout from a dive where forces of 4g are being generated?

• 72 kts
• 52 kts
• 60 kts
• 45 kts

The stall behavior of a swept-wing aeroplane as a result of the turbulent downwash contacting the horizontal tail is:

• nose-down
• nose-up
• tendency to accelerate after the stall
• nose-up and/or elevator ineffectiveness

For any given configuration the stick shaker is activated when the IAS is:

• 1.3 Vs
• 1.12 Vs
• Greater than Vs
• 1.2 Vs

An aeroplane has a stall speed of 78 kt at its mass of 6850 kg. What is the stall speed when the mass is 5000 kg?

• 67 kt
• 91 kt
• 57 kt
• 78 kt

the following factors increase stall speed:

• an increase in load factor, a forward CG movement, decrease in thrust.
• a higher weight, selecting a higher flap setting, a forward CG movement.
• increasing bank angle, increasing thrust, slat extension.
• a lower weight, decreasing bank angle, a smaller flap setting

The percentage lift increase in a 35◦ banked turn compared with straight and level flight is:

• 41%
• 22%
• 31%
• 52%

In a 20◦ banked turn the stalling speed is 80 kt. For the same aeroplane the stalling speed in a 60◦ banked turn is:

• 80 kt
• 103 kt
• 150 kt
• 110 kt

In straight and level flight an aeroplane has a Cl of 0.40. A 1◦ increase/decrease of angle of attack increases/decreases the Cl by 0.15. A gust of wind causes the angle of attack to increase by 2◦. What is the revised load factor caused by this event?

• 1.75
• 0.7
• 1.4
• 1.0

Stall speed (IAS) varies with:

• weight.
• density.
• temperature.
• altitude - below approximately 10000 ft

At higher altitudes, the stall speed (IAS):

• Decreases
• Increases
• Remains the same
• Decreases until the tropopause