Schempp-Hirth Flugzeugbau Ventus-3T Sport, Руководство по эксплуатации самолета, Страница: 97 / 177

SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Ventus-3T „Sport“ FLIGHT MANUAL
April 2018 CS 22
Revision – 4.5.7.5
Water ballast is dumped from the fin tank through an opening on the lower
side of the fuselage tail boom, in front of the rudder. The fin tank dump valve is
mechanically linked to the drive for the valves of the middle wing tank, so that
the middle and outboard wing tanks are always opened simultaneously with
the fin tank.
The time required to dump the ballast from a full fin tank is about 90 seconds,
therefor draining the fin tank always takes less time than emptying the middle
and outboard wing tanks.
Warning:
o
While flying for longer time at air temperatures near 0° C (32° F),
water ballast must be dumped in any case when reaching a
temperature of 2° C (36° F). Thus avoiding freezing of the dump
valves and possible structural damage of the aircraft parts.
o
Never pressurize the tanks for instance by filling them directly from
a water hose and always pour in clear water only.
o
On no account whatsoever must the powered sailplane ever be
parked with full ballast tanks if there is the danger of them freezing
up. The parking period with full tanks should not exceed several
days. For parking all water ballast is to be completely drained off
with filler caps removed to allow the tanks to dry out.
o
When using the fin tank, check that those spill holes not being
taped closed are clear.