POF 3

An aeroplane is performing a co-ordinated level turn with a constant bank angle. If the airspeed is increased the rate of turn will _ (i) and the load factor will _ (ii)

• i) decrease; ii) decrease.

• i) decrease; ii) not change.

• i) increase; ii) increase.

• i) increase; ii) not change.

How does positive camber of an aerofoil affect static longitudinal stability?

• Negatively, because the lift vector rotates forward at increasing angle of attack.

• Positively, because the centre of pressure shifts rearward at increasing angle of attack.

• No effect, because camber of the aerofoil produces a constant pitch down moment coefficient, independent of angle of attack.

• Positively, because the lift vector rotates backward at increasing angle of attack.

A statically stable aeroplane:

• is never dynamically stable.

• is always dynamically stable.

• can show positive. neutral or negative dynamic longitudinal stability.

• will never show positive dynamic longitudinal stability. but always neutral dynamic longitudinal stability.

At MCRIT, a shockwave will appear first:

• at the leading edge.

• near to the point of maximum wing thickness.

• at the trailing edge.

• on the underside of the wing

Which statement is correct? 1) The angle of attack of a positively cambered aerofoil has a negative value when the lift coefficient equals zero. 2) There is a nose down pitching moment about a positively cambered aerofoil when the lift coefficient equals zero.

• 1) is incorrect, 2) is correct.

• 1) is correct, 2) is incorrect.

• 1) is correct, 2) is correct.

• 1) is incorrect, 2) is incorrect

Comparing the differences between a horizontal trimmable stabiliser and an elevator trim tab, which statement is correct? 1) A stabiliser trim is less suitable for jet transport aeroplanes because of their large speed range. 2) A trim tab is a more powerful means of trimming.

• 1) is correct, 2) is correct.

• 1) is incorrect, 2) is incorrect

• 1) is correct, 2) is incorrect.

• 1) is incorrect, 2) is correct.

Considering subsonic incompressible airflow through a Venturi, which statement is correct? 1) The dynamic pressure in the throat is lower than in the undisturbed airflow. 2) The total pressure in the throat is higher than in the undisturbed airflow.

• 1) is correct, 2) is incorrect.

• 1) is incorrect, 2) is correct.

• 1) is incorrect, 2) is incorrect

• 1) is correct, 2) is correct.

Which of these statements about stall speed is correct?

• Decreasing sweepback increases stall speed.

• Decreasing sweepback decreases stall speed.

• Decreasing wing anhedral decreases stall speed.

• Increasing wing anhedral decreases stall speed.

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

• 1) is correct, 2) is incorrect

• 1) is incorrect, 2) is correct

• 1) is correct, 2) is correct

• 1) is incorrect, 2) is incorrect

A rectangular wing, compared to other wing planforms, has a tendency to stall:

• first at the leading edge, with progression outward toward the wing root and tip.

• first at the Wingtip, with the stall progression toward the wing root.

• first at the wing root, with the stall progression towards the wing tip.

• first at the semi-span centre, giving good aerodynamic stall warning.