Filling The Wing Water Ballast Tanks; Filling The Fin Ballast Tank; Ballast Box In The Fin - DG Flugzeugbau DG-1000S Flight Manual

Flight manual DG-1000S
4.2.2

Filling the wing water ballast tanks

First open the fin tank and then open the right wing tank valve (top handle).
Place the right wing tip on the ground. Attach the hose in the water outlet on the
lower surface of the wing. Fill with water. Close the valve.
Place the left wing tip to the ground and fill the left tank accordingly. Filling
with water ballast is only allowed with a filling system which enables you to
determine the exact amount of ballast filled in, e.g. water gauge or calibrated
canisters.
Warning: Fill the hose from your water containers but never from a main
pressure water supply. Filling the wing tanks with excessive pressure (more than
0.2 bar, 3 psi) will definitely burst the wing shell!
Caution: If the tanks are to be filled up completely you must suck the air out of
the tanks with the filling hose, as the tanks have no ventilation line.
Fill with the desired amount of water regarding the loading chart see section
6.8.5.
In case a valve leaks slightly, you may try to pull out the PVC pushrod of the
valve to stop the leak. If this cannot be done successfully refer to maintenance
manual 1.8.1. and 4.1.
It is not allowed to fly with leaking watertanks, as this may result in
asymmetrical loading condition.
After filling the tanks, check to see if the wings are balanced. If one wing is
heavier, dump enough water to balance the wings.
Finally press the Teflon-glass-fabric which shall close the dump holes against
the wing-shell. There must be always a small amount of grease on the shell, to
ensure that the covers stick to the shell.
Warning: Follow the loading chart section 6.8 must be observed. The
maximum take off weight must not be exceeded.
Issued: March 2002
LBA app. 4.4
Flight manual DG-1000S
4.2.3

Filling the fin ballast tank

This tank must be filled after filling the wingtanks. Determine the amount see
section 6.8.6. Connect the transparent funnel equipped filling hose (supplied
with the aircraft) via the hose connector GRS 10-12 to the hose which comes out
of the left rear end of the fuselage.
The funnel can be suspended at the top of the rudder.
Fill with clean water using a graduated measuring vessel.
In addition you may check the content level by holding the filling hose against
the scale on the fin.
After filling, push the fin tank dump lever in forward direction (the dump valve
will be closed by a spring).
Then remove the filling hose with the hose connector.
4.2.4

Ballast box in the fin

To fill the ballast box remove the Plexiglas cover plate by inserting a 6mm pin
into the hole of the upper locking device and move the locking pin downwards.
Determine the amount of trim-weights according to section 6.8.7. Slide the
weights into the rails of the box. The heavy weights with 2,4 kg (5.3 lbs.) each
must be installed in the lower 4 sections and the lighter weights with 1,2 kg
(2.65 lbs.) each in the upper 2 sections. It doesn't matter in which sections the
weights are installed (in case that not all sections will be filled up), but it is not
allowed to insert the light weights into the sections for the heavy weights. Close
the compartment.
Warning: Check that the locking device has engaged completely.
A control light in the front instrument panel starts blinking after each transaction
with the weights. By counting the amount of blinks, the amount of ballast can be
determined. For a heavy weight 2 blinks appear and 1 blink for a light weight,
this means 10 blinks if the box is filled up completely. After a pause of 2-3
seconds the blinking will be repeated etc. The blinking can be stopped by
pressing on the control light. Pressing again on the control light reactivates the
blinking feature.
After filling the ballast box you should check the correct indication of the
control light.
Issued: March 2002
LBA app. 4.5