Power-Off Stalls Flashcards
When does a stall occur?
When the smooth airflow over the airplane’s wings is disrupted resulting in loss of lift.
It is possible to exceed the critical AOA and have a stall occur …
… at any airspeed, at any attitude, at any power setting.
Define a) impending stall and b) full stall…
A) A stall that occurs when the AOA causes a stall warning, but has not yet reached the critical AOA.
B) A stall that occurs when the critical AOA is exceeded.
What are the various warnings of an approaching stall condition?
Stall warning, control pressure changes (mushiness), and buffeting.
Fill in the blanks.
AOA indicators can provide a _______ indication of the airplane’s proximity to the ______ of AOA.
Visual
Critical
True or False… AOA indicators are standardized and no specific training is needed.
False.
If an airplane includes an angle of attack indicator, what should the pilot know:
The type of AOA indicator installed
How the device determines the AOA
What the display is indicating
What part of the wings would first experience the disruptive airflows in a stall?
The root of the wings.
Wing washout is a design feature that results in…
The root of the wings stalling before the wing tips.
Because of the wing washout, the wing roots stall first, therefore the ailerons should…
still have a degree of control effectiveness.
While not the key aspect of a safe stall recovery, smooth application of power will…
Aid in increasing the airplane’s airspeed to minimize altitude loss.
What are the six steps of a stall recovery?
Disconnect autopilot
Pith nose down control (Trim nose down pitch)
Roll wings level
Add thrust/power
Retract spoilers/speed breaks
Return to desired flight path
What general rule do you think applies to the retraction of flaps in stall recovery for stall in which flaps have been extended (power-off stalls)?
Don’t retract the last 10 or 20 of flaps until 1) the airplanes is climbing (positive indication of climb) and 2) airspeed is sufficient to maintain the climb (at or above VR).
Rudder coordination is critical in entry and recovery from a stall. It is imperative to proactively cancel yaw with proper use of he rudder to prevent…
a stall from progressing into a spin.
What are the two reasons that student pilots practice making the airplane wings stall during private pilot training?
To develop quick reflex responses to recover from a stall should one ever occur in flight
To learn to recognize an impending stall before it happens, so that prompt action can be taken to prevent a stall from occurring.
The point of practicing stalls is to learn…
How to detect a stall before it ever happens, and how to recover from one if necessary.
Stall accidents usually result from…
An inadvertent stall at a low altitude.
The practice of power-off stalls is usually performed with normal landing approach conditions to simulate an accidental stall occurring…
During approach to landing
The purpose of practicing impending stalls is to…
learn to regain full control of the airplane immediately upon recognizing that it is nearing a stall.
In practicing approaches to stalls, the pilot initiates recovery
At the first indication, such as by a stall warning device activation.
During a power-off stall, directional control should be maintained with the _______ and the wings held level by use of the _________.
Rudder,
Ailerons
Recovery from the power-off stall is accomplished by reducing the _________, applying as much nose-down control input as required to eliminate the stall warning, leveling the ________, maintaining _________ flight, and then applying ______ as needed.
AOA
Wings
Coordinated
Power
Why is it necessary to add right rudder during stall recovery?
To overcome the engine torque effects as power is advanced.
If simulating an inadvertent stall on approach to landing, the pilot should recover by…
Initiating a go-around by establishing a positive rate of climb.
The ACS states to maintain a specified heading, + or - _____ degrees, if in straight flight, and maintain a specified angle of bank not to exceed 20 degrees, + or - ______ degrees if in turning flight, while inducting a stall.
10,
5
The ACS states to maintain a specified heading, + or - _____ degrees, if in straight flight, and maintain a specified angle of bank not to exceed 20 degrees, + or - ______ degrees if in turning flight, while inducting a stall.
10,
5
During recovery from the stall, the pilot should accelerate to what airspeed?
Vx (Climb speed)
Vy (rate of climb speed)
