Stalling, Spinning & Spiral Dives Flashcards
What is an aircraft stall?
The significant breakdown of streamline flow into turbulence over an aerofoil
When is an aircraft stalled?
When the critical angle of attack of the wings is exceeded
Why is stalling bad?
When an aircraft stalls, the lift production reduces and so no longer balances weight. Drag increases significantly
The aircraft will descend.
What is laminar airflow?
Smooth, streamline airflow over the wing
What is the transition point?
The point at which laminar airflow changes to turbulent airflow
What is the separation point?
Turbulent air separates from the upper surface of the aerofoil
What are the symptoms of a stall?
High nose attitude Low airspeed Stall stick postion Stall warning Buffet Mushy controls Nose drop Wing drop Inability to stop descent
What is the stall speed?
The speed below which an aeroplane will stall
Does an aircraft stall at a speed or an AoA?
An AoA
How does an increase in weight impact stall speed?
Increases stall speed
How does an increase in altitude impact stall speed?
No impact
Stall speed is an IAS which does not change with altitude
How does an increase in power impact the stall speed?
Lowers stall speed
How does an increase in bank angle impact the stall speed?
Increases stall speed
What impact does lowering flaps have on the stall speed?
Lowers stall speed
What impact does moving the CoG forward have on stall speed?
Increases stall speed
What impact can windshear have on stall speed?
Windshear can change the direction of the relative airflow causing the critical angle to be exceeded with no control input