Flight manual DG-1000S
Issued: March 2002
LBA app.
4.18
4.5.8
Aerobatics
Caution:
The DG-1000S is a high performance sailplane. Therefore the speed
increase in the dive, especially in inverted flight is high.
Training aerobatics therefore should only be executed after a rating with an
experienced pilot, or if you can master the manoeuvres on other sailplane types.
In any case don't try to execute the manoeuvres with entry speeds other than
those listed.
Caution:
Do not make full or abrupt control movement above the manoeuvring
speed V
A
=185 km/h (97 kts.). At speeds between V
A
and V
NE
= 270km/h
(146 kts.) reduce the control movements accordingly. At V
NE
only 1/3 of the
max. control movements are allowed.
4.5.8.1
Category U, Utility
Warning:
Execute only the approved manoeuvres.
Approved manoeuvres valid for all spans, but only without waterballast and with
the weight of the rear pilot compensated by ballast in the ballast box in the fin
see section 6.8.7.
Approved manoeuvres
Entry speed
g-loads
Spin
/
/
Inside loop
180 - 200 km/h (97 - 108 kts)
4.0
Chandelle
180 - 200 km/h (97 - 108 kts)
3.5
Lazy Eight
180 - 200 km/h (97 - 108 kts)
3.5
Stall turn
200 - 220 km/h (108 - 119kts)
4.0
Flight manual DG-1000S
Issued: March 2002
LBA app.
4.19
Spins
Caution:
Prolonged spinning is satisfactorily accomplished with aft C.G.
positions. If prolonged spinning is intended, ballast in the ballast box in the fin
should be used to achieve an aft C.G. position, see section 6.8.7.
It is not necessary to extend the dive brakes during spin recovery. The
DG-1000S displays a large nose down pitch attitude after leaving the spin. So
you have to flare out correspondingly.
With
medium and forward C.G. positions
prolonged spinning is not possible.
The DG-1000S will terminate the spin by itself after a certain number of turns
dependent on the C.G. position. The nose down pitch and speed will be high so
with these C.G. positions not more than 1 turn spins should be executed, to
avoid high g-loads.
In addition there is a tendency that the spin will turn into a spiral dive after 1 or
2 turns. On reaching this state you must recover immediately.
Inducing the spin:
Gradually bring the sailplane into a stall. When buffeting
starts, pull the stick back completely and kick in full rudder in the direction of
spin.
Recovering from the spin:
Apply full rudder opposite to the direction of spin,
then ease stick forward until the rotation ceases, centralize the controls and
carefully pull out of the dive. The ailerons should be kept neutral during
recovery. Height loss during recovery is approx. 100 m (320 ft), the max. speed
is 200 km/h (108 kts.).