Whee/brake
The wheelbrake lever
is
on
the control stick.
Trim
The trim control is
on
the left front edge of the seat
pan
. At
mid
-point cockpit loading
it
is
possible to trim for airspeeds of approximately 60 - 180 km/h
(32
- 97kt).
Flight with water ballast
Flying at maximum cockpit load with full water ballast, the glider has a gross weight
near that of the normal two-seater glider.
The
slow-speed flight and take-off behaviour of the glider fully loaded therefore differs
somewhat from the behaviour of the
glider flown without water ballast. The take-off
speed rises to approximately
70
km/h (38kt). For correction of the flight attitude larger
control deflections are necessary. The loaded wing will tend to drop a tip near the
ground, but with rapid application of normal control movement this can
be
corrected.
Slow-speed flight, and stalling with full additional load, should
be
practised
by
the pilot
at
a safe height.
The water tanks are
in
the wing leading edge, extending from the root
rib
and contain
approximately
50
litre/wing
(11
gallons/wing).
Filling the containers
is
done through the covers
on
the upper side of wing. The covers
can
be
lifted out with a
pin
.
During flight with partly filled tanks
no
noticeable water movement arises because of
the inserted bulkheads.
The desired quantity of water ballast must
be
distributed evenly between both wing
tanks,
so
that the lateral stability
is
not affected.
Discharging takes place via
an
opening
in
the lower fuselage side behind the
undercarriage bay.
To
open the drain valves
on
the tanks the white lever
on
the right
side of the seat pan must
be
pushed to the rear. Draining the tanks takes about three
minutes.
The draining of the water ballast tanks takes place via
an
overflow pipe, which ends
in
the fuselage fairing under the root
rib
. This pipe must not
be
masked with tape. During
a flight with water ballast, the wing-fuselage junctions on the lower surface under the
overflow pipe should not
be
masked with tape; this will avoid the leakage of water into
the fuselage.
With long flights
in
air temperatures around 0°C (32°F) the water must
be
completely
discharged because of the danger of freezing.
Before 'off-field' landings the water ballast should
be
completely discharged.
When 'parking
up
' the glider, the water tanks should
be
emptied
in
principle,
in
order to
prevent freezing.
When derigging the glider the tanks empty themselves automatically through the tube
end
in
the root
rib
.
With long tow-outs
on
uneven ground the tanks should
be
emptied to reduce the wing
bending loads.
10
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