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Document No.:G304C/AFM
Date of Issue: 12/01
4-8
Approved
H
P
H
Ltd.
4.5.3 Approach and landing
The normal approach speed with air brakes fully extended and the
extended landing gear is approx. 85-90 km/h (46-49 KIAS, 53-56
mph) at the landing weight of 380 kg (838 lbs).
The corresponding gliding ratio is then approx. 1:5. The minimum
approach speed is 80 km/h (43 KIAS, 50 mph).
Immediately before touch-down, the air brakes should be always
open fully.
The approach speeds have to be increased of approx. 10 km/h (5.4
KIAS, 6.2 mph) at the landing weight of 450 kg (932 lbs).
For steep approaches (e.g. in strong ground turbulence or when
approaching over high obstacles) the air brakes are fully extended,
and the glide angle is controlled with the elevator.
Excessive height can thus be reduced without increasing approach
speed noticeably.
WARNING
The water ballast (if filled) should be emptied before landing.
If a sideslip is used to reduce the approach height with air brakes
and landing gear extended, than apply only 1/2 of rudder pedal
deflection. If higher deflection is used than the rudder is affected by
the wake behind the air brakes and the vibration of the sailplane
may occurs. If the rudder full deflection is applied than the rudder
suction will occur.
If the vibration during a sideslip occur, reduce the air brakes
extension to 1/2 of full deflection and recover level flight, than the
air brakes may be fully extended again.
