Schempp-Hirth Flugzeugbau Ventus-3T Sport, Руководство по эксплуатации самолета, Страница: 73 / 177

SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Ventus-3T „Sport“ FLIGHT MANUAL
April 2018 CS 22
Revision – 4.5.1.2
For rearward c/g positions and low all-up masses the powered sailplane is lifted off
with flaps set at "+2".
In the case of forward c/g positions or high all-up masses a setting of “L” may be
used to shorten the ground roll distance.
After lifting off, between about 80 to 90 km/h (43-49 kt, 50-56 mph), depending on
wing loading and flap setting, the elevator trim might be set for minimum control
stick loads.
With flaps set at "+2", normal towing speed is in the region of 120 to 140 km/h
(65-76 kt, 75-87 mph) and between about 130 to 150 km/h (70-81 kt, 68-93 mph)
for higher all-up masses.
At higher towing speeds and low all-up masses, i.e. above about 160 km/h (86 kt,
99 mph), flap setting "-1" or "-2" should be used (see diagram below). With these
settings, speeds up to V
T
are covered by the elevator trim.
Only small control surface deflections are necessary to keep station behind the
tug. In gusty conditions or when flying into the propeller slip stream of a powerful
tug, correspondingly greater control stick movements are required.
At lower speeds the undercarriage may be retracted during the tow; however this
is not recommended at low altitude, because changing hands on the stick could
easily cause the powered sailplane to lose station behind the tug.
For releasing the tow rope, pull the yellow knob fully several times and turn only
when definitely clear of the rope.