Stalling

Question 1

Why does an aerofoil stall?

Answer 1

The critical angle has been exceeded and the wing can no longer produce enough lift to balance the weight

Question 2

Vs0

Answer 2

Stall speed with flaps - 41 KTS

Question 3

Vs1

Answer 3

Stall speed without flaps - 47 KTS

Question 4

How does increased weight affect stall speed?

Answer 4

Stall speed increase

Question 5

How does CoG moving aft affect stall speed?

Answer 5

Stall speed decrease

Question 6

How does decreased power affect stall speed?

Answer 6

Stall speed increase

Question 7

How do retracted flaps affect stall speed?

Answer 7

Stall speed increase

Question 8

HASELL (HELL)

Answer 8

-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, above unpopulated area, clear of high traffic areas
-Lookout, 180/2x 90 degree turns

Question 9

Symptoms of incipient stall

Answer 9

• Reduced cockpit noise
• Low and decreasing airspeed
• Stall horn
• Reduced control effectiveness
• Unusually high nose attitude

Question 10

Recovery from incipient stall

Answer 10

• Lower nose
• Apply power
  -Right rudder

Question 11

Fully developed stall symptoms

Answer 11

• Nose drop
• High rate of descent
• Aircraft highly unstable, possible wing drop

Question 12

Recovery from full stall

Answer 12

Stall horn activates - carby heat off
Pitch nose down to S&L
Full power, ailerons neutral
Rudder to prevent wing-drop (keep wings level)
Go around procedure
Regain altitude lost.

Question 13

Incipient spin effect

Answer 13

• Both wings are stalled
• Aircraft yawing at the point of stall, called autorotation

Question 14

Incipient spin recovery

Answer 14

Power - idle
Aileron - neutral
Rudder - full opposite
Elevator - through neutral
Once rotation stopped
Centralise rudder
Positive dive recovery
Power above horizon