Ae106 Stalls Flashcards
What force opposes and controls the adverse pressure gradient?
The kinetic energy of the relative wind
What is the definition of boundary layer separation?
Point in the streamline where airflow no longer adheres to the airfoil
What is the point of stall on a C curve?
CLMAX
What is the definition of a stall?
Condition in flight where increase in AOA results in decrease in CL
What is the key difference between an aircraft’s stall AOA and stall airspeed?
Stall AOA remains constant – stall airspeed is variable
What are the factors associated with increased thrust that impact stall characteristics?
Vertical thrust component and propeller acceleration factor
What are the two major classifications of stalls?
Power-on stall and power-off stall
Which type of stall will have the lowest stall airspeed?
Power-on stall
Which flight control would you normally expect to be least effective during a stall/stall recovery?
Ailerons
Which aircraft would stall at a higher indicated airspeed? 4300 pound gross weight or 5800?
5800 pound aircraft
Which aircraft would stall at a higher true airspeed? 6000ft or 12300ft MSL?
Aircraft at 12,300 MSL
How do you think increased G loading will affect stall airspeed?
Stall airspeed increases
If maintaining level flight, what happens to stall airspeed as you increase bank angle?
Stall airspeed increases because of the increase in load factor needed to maintain level flight
What is the effect of increased weight on stall airspeed?
Stall airspeed will increase
Higher G loading and higher bank angle = ______ stall airspeed.
higher
What is the basic function of a boundary layer control (BLC) device?
To suppress boundary layer separation
What is the T-6A stall AOA?
18 units
What is the primary artificial stall warning in the T-6A?
Stick shaker
What does activation of the stick shaker indicate?
Aircraft is approximately 5 to10 knots above stall speed
What is the definition of boundary layer separation?
Point in streamline where airflow no longer adheres to the airfoil
What effect does increasing AOA have on the kinetic energy of the relative wind?
Decreases it
What is the definition of a stall?
Condition in flight where increase in AOA results in decrease in CL
What are the two major classifications of stalls?
Power-on stall and power-off stall
What are the factors associated with increased thrust that impact stall characteristics?
Vertical component of thrust and propeller acceleration factor
What are the benefits provided by Boundary Layer Control (BLC) devices?
Increased maneuvering capabilities, Decreased landing speed and distance
Which type of stall will have the lower stall airspeed?
Power-on stall
What is the T-6A stall AOA?
18 units
What is the only reason the T-6A will stall?
Exceeding T-6A stall AOA (18 units)
Describe laminar airflow.
Area of the boundary layer where air molecules flow smoothly within the streamline
