Flight manual DG-800S
7.10
Waterballastsystem
see diagram 5 M.M.
a) The wingtanks are constructed as double wall bags with a capacity of
60 l (15.85 U.S.gal) or 87 l (23 U.S. gal) per wing. The 87 l tanks are
separated in 2 chambers to reduce the pressure load in case of spinning
and positive g-loads. The separation also improves the handling of the
glider with the tanks filled partly. The dump valves are mounted in the
wings and the control is hooked up automatically when rigging the
glider.
b) Fin ballast tank with 6.2 l (1.64 U.S.gal.) capacity. This tank is
constructed as integral tank with a ventilation tube. Filling is via the
dump valve. The dump valve is opened by a cable and closed by a steel
tension spring. If you overfill the tank, the excess water drains via a
hole in the rear fin shear web.
c) control handles
The handle for the fintank (wide plate) is above the wingtank handles,
so that the wingtanks can only be emptied after opening the fintank.
Warning:
It is prohibited to change this system!
The handle for the fintank will stay in the open position by an overcentre
device. The upper handle is for the right and the lower handle for the left
wingtank.
7.11
Pitot and static system
See diagram 6 M.M.
Pitot probe in fuselage nose, and static ports a short distance behind
fuselage nose. The airspeed indicator and the altimeter are to be connected
to these probe and ports.
Additional holder for a Multiprobe in the fin is to operate variometer and
flight computersystems.
To preserve the sealings inside the holder the end of the probe should be
greased with Vaseline from time to time.
Issued: April 1997
7.8
