19. Stalling and spinning (Stalling) Flashcards
Stalling occurs at high angles of attack when the airflow around the aerofoil is unable to remain streamlined, separates from most of the upper surface and becomes ……..
turbulent.
You can induce a stall intentionally by applying (forward / back) pressure on the control column to (increase / decrease) the angle of attack.
back; increase
You can recover from a stall by (relaxing / increasing) the back pressure on the control column to (increase / decrease) the angle of attack.
relaxing; decrease
Recovering from a stall requires you to:
a. increase lift.
b. increase power.
c. increase drag.
d. reduce the angle of attack.
d.
Beyond the stalling angle, the centre of pressure for the diminished lift force moves (rearward / forward) allowing the nose to drop.
rearward.
If the wings stall, the turbulent airflow over the horizontal stabiliser may cause control ……..
buffeting
A typical light training aircraft will stall when the wings are at about (0 / 4 / 16) degrees of attack.
16
Stalling is associated with a particular …….. …….. ……..
angle of attack.
If the lift required from the wings increases due to the pilot banking the aircraft and applying back pressure on the control column to maintain altitude, then the stalling speed compared with that in straight-and-level flight will (increase / stay the same / decrease).
increase.
In a banked turn at a constant altitude, the load factor is (increased / decreased / equal to 1).
increased.
The steeper the turn the (greater / smaller) the load factor.
greater.
The steeper the turn the (higher / lower) the stalling speed.
higher.
Stalling speed (increases / decreases / remains unaltered) with an increase in bank angle.
increases.
Pulling out of a fast and steep dive, the load factor (is increased / is decreased / remains the same as in smooth , straight-and-level flight).
is increased.
Pulling out of a fast and steep dive, the stalling speed (is increased / is decreased / remains the same as straight-and-level)
is increased.
Stalling occurs at the critical …….. ……… …….. for an aerofoil.
angle of attack.
The stalling IAS (varies / does not vary) with altitude.
does not vary.
Flaps (lower / increase) the stall speed.
lower.
The wings of an aircraft can be stalled:
a. only when the nose is high and the airspeed is low.
b. at any airspeed and in any flight attitude, provided that the critical angle of attack is reached.
b.
Increasing the load factor (increases / decreases / does not affect) the stalling angle of attack.
does not affect.
Increasing the load factor (increases / decreases / does not affect) the stalling speed.
increases.
As bank angle is increased, the stalling speed (increases / decreases / stays the same) and the stalling angle of attack (increases / decreases / stays the same).
increases; stays the same.
Turbulent air can cause an increase in stall speed by causing:
a. abrupt increases in the angle of attack and load factor.
b. abrupt decreases in the angle of attack and load factor.
c. abrupt increases in weight.
d. abrupt increases in indicated airspeed.
a.
If one wing drops as the aircraft stalls, attempting to ‘pick it up; with aileron can:
a. take the angle of attack of the dropped wing further beyond the stalling angle.
b. stall the up-going wing by increasing its angle of attack beyond the stalling angle.
a.
