Microlight Flight Lessons
Exercise 10A Slow Flight
Aim
To become familiar with the feel of the
aircraft in slow flight just above the stall
speed, and to recognise the symptoms of
the incipient stall. Also to restore the aircraft to safe flight before the stall occurs.
Stall and stall speed
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In steady level flight , as airspeed is
reduced angle of attack will also
increase
This will happen whenever the
airspeed is reduced, regardless of
whether the aircraft is level or gliding
If flown too slowly the angle of
attack will exceed the critical angle
and the air flow will stall
Stalled flow
Controlled flight is not possible below this
critical speed/angle
Indications of slow flight VS 5
In a turn
The Incipient Stall
Last warning of the approaching stall
Airmanship
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Pre stall check
H.A.S.E.LL
H – Height min 1000ft agl for exercise
A – Airframe secure
S – Security straps, Helmets, Loose articles
E – Engine- Temp
L – Location – Airspace, Drift, Habitation.
Lookout – Lookout – Clearing turn. Look above
and below
This check should be repeated once every
3 to 4 minutes or more often in poor visibility
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