Schempp-Hirth Flugzeugbau Ventus-3T Sport, Руководство по эксплуатации самолета, Страница: 74 / 177

SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Ventus-3T „Sport“ FLIGHT MANUAL
April 2018 CS 22
Revision – 4.5.1.3
Winch launch
Winch launch is only permissible at the installed c/g tow release and with
retracted power plant
Maximum permitted launching speeds
V
W
= 150 km/h (81 kt, 93 mph)
Prior to take-off – with flaps to be at setting "+2" – set the elevator trim as
follows:
Rearward c/g positions: trim knob fully forward
Intermediate c/g positions: trim knob forward to first quarter of its travel
Forward c/g positions: trim knob to the middle of its travel
As the cable tightens, apply the wheel brake gently (via the stick-mounted
lever) to prevent the aircraft from overrunning the winch cable.
Ground roll and lift-off are normal – there is no tendency to veer-off or to climb
excessively steeply on leaving the ground. Depending on the load on the seat,
the aircraft is lifted off with the control stick almost fully pushed forward in the
case of aft c/g position, slightly pushed forward in case of c/g in central
positions and slightly pulled back with the c/g in a forward position. After
climbing to a safe height, the transition into a typical steep winch launch
attitude is effected by pulling the control stick slightly further back.
At normal all-up masses, without water ballast, the launch speed should not be
less than 90 km/h (49 kt, 56 mph), and with water ballast not less than 100 to
120 km/h (54-65 kt, 62-75 mph).
Normal launch speed without water ballast is about 100 to 120 km/h (54-65 kt,
62-75 mph), with water ballast about 115 to 140 km/h (62-76 kt, 71-87 mph).
At the top of the launch the cable will normally back release automatically;
nevertheless should not be neglected to actuate the release knob several
times.