Stalling Flashcards
Why does an aerofoil stall?
The critical angle has been exceeded and the wing can no longer produce enough lift to balance the weight
Vs0
Stall speed with flaps - 41 KTS
Vs1
Stall speed without flaps - 47 KTS
How does increased weight affect stall speed?
Stall speed increase
How does CoG moving aft affect stall speed?
Stall speed decrease
How does decreased power affect stall speed?
Stall speed increase
How do retracted flaps affect stall speed?
Stall speed increase
HASELL (HELL)
-Height sufficient to recover by 3000’ AGL
-Airframe configured as required
-Security, no loose articles, hatches/harnesses
-Engine T’s and P’s in green
-Location, clear of high traffic areas
-Lookout, 180/2x 90 degree turns
Symptoms of incipient stall
- Reduced cockpit noise
- Low and decreasing airspeed
- Stall horn
- Reduced control effectiveness
- Unusually high nose attitude
Recovery from incipient stall
- Lower nose
- Apply power
Fully developed stall symptoms
- Nose drop
- High rate of descent
- Aircraft highly unstable, possible wing drop
Recovery from full stall
Stall horn activates - carby heat off
Pitch nose down to S&L
Full power, ailerons neutral
Rudder to prevent yaw
Once 65 retract 1st stage flaps
Raise nose to climb attitude
Positive rate of climb
Retract the rest of flap
Incipient spin effect
- Both wings are stalled
- Aircraft yawing at the point of stall, called autorotation
Incipient spin recovery
Power - idle
Aileron - neutral
Rudder - full opposite
Elevator - through neutral
Once rotation stopped
Centralise rudder
Positive dive recovery
Power above horizon
