SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Ventus-3M „Performance“
FLIGHT MANUAL
March 2019
CS 22
Revision –
4.5.9.1
4.5.9
Flight with Water Ballast
Water ballast is necessary to reach the maximum all-up mass.
Wing ballast tanks
The water tanks are integral compartments in the nose section of the wing panels.
In the right and left wing are on each side 2 water tanks integrated.
The outer tank (in the outer wing panel) is linked to the adjacent tank (in the inner
wing panel). The connection is automatically done when rigging the outer wing
panel.
These tanks are to be filled with clear water only, through 4 round openings in the
upper wing surface.
The openings are closed with filler caps provided with thread. The filler caps have
a slit and may be opened with the help of the rigging tool or a coin.
A hole in the filler caps serves for venting the tank. The hole features a valve
preventing the loss of bigger amount of water when the wings are i.e. placed on
the ground.
Warning:
The hole in the water filler caps must always be kept open and not taped.
Keep the valve and the plastic ball in it always clean. No grease of oiling!
The plastic ball must be able to move freely.
The capacity of right and left inner tanks combined is
approx. 106 litres (28 gallons)
The combined capacity of the right and left outer tanks (in the outer wing panels) is
approx. 26 litres (6.8 gallons).