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Document No.:G304C/AFM
Date of Issue: 12/01
4-9
Approved
H
P
H
Ltd.
4.5.4 Flying with water ballast
The use of water ballast is not of benefit when climbing at the
average climbing speeds less than 1.5m/sec (300 ft/min).
This is valid also for flights in tight thermals, which require steep
angles of bank.
Prior to adding water ballast, check the table in 2.4 for the
maximum weight of water ballast. The total capacity of the bags in
the wings is 115 liters (25.3 UKgal, 30.4 USgal). Fill through the
valves in the lower surface of the wings. Let the actuating lever in
"close" position, fill left bag, disconnect the filler tube from the valve
(it will be closed automatically), fill right bag by the same steps as
the left.
WARNING
Bags must not be pressurized, e.g. fill directly from the water hose.
Both bags must be filled equally.
Do not add water ballast below O°C (32
o
F), because of freezing
danger.
The water ballast should be emptied before landing.
It takes about 4 minutes when the bags were full.
Never store the sailplane with filled bags. Always drain off water
and open the valves to vent the water bags.
4.5.5 High speed flight
During high speed flight, pay attention to the never exceed speed.
Refer to 2.2 and 2.3 for the Airspeed limits and Airspeed Indicator
Marking.
Aileron and rudder full deflections may be applied up to the
Maneuvering speed Full control deflections of aileron and rudder
are allowable up to VA=200 km/h IAS (108 KIAS, 124 mph).
Only 1/3 of the aileron and rudder full deflections may be used at
Never exceed speed VA=250 km/h IAS (135 KIAS, 156 mph).
Elevator deflections must be limited, as well, to not exceed the load
factors shown in 2.7.
