AirDesign VOLT 4, Руководство пользователя

Страница: 51 / 129

50
After pre-filling the glider stabilizes its movements and the brakes can be leased until the glider
recovers speed and flies again.
Only release
the glider when it’s in front or over head – never when the glider sits back of the
pilot.
ATTENTION: The full stall requires a lot of height and demands certain skills to recover. It is
important this manoeuvre is not practiced without qualified supervision.
It should preferably be practiced during a safety training course.
The
deep stall, or parachutal stall is kind of the pre-stage to a full stall. The wing has no
forward motion and a high sink speed, but it is almost fully inflated. The pilot can enter the
deep stall by applying both brakes. It is very difficult to keep the wing in a deep stall: If you pull
the brakes a little too much, the glider will enter a Full Stall. If you release the brakes too much,
the glider will go back to normal flight. To practice a deep stall, it is necessary to master the full
stall first.
A very old or worn out glider with a porous cloth or with a changed trim (due to many winch
launches, or deep spirals) might stay in a deep stall even after releasing both brakes. Do not
apply the brakes in such a situation, because the wing would then enter a full stall! You can exit
the deep stall by pushing the speed bar, or by simply pushing the A-Risers forward. If you fly
through rain, the risk of a deep stall is higher.
We strongly advise against flying in rainy conditions . Normally the VOLT4 does not show a
tendency for a deep stall. If it happens that you get into rainfall, we recommend not to perform
a B-stall or Big Ears. The best is to leave the rain as soon as possible, and to fly with both brakes
released, or even accelerated, as this reduces the risk of a deep stall. (The available brake
travel before entering a deep stall may be reduced significantly.)
If a deep stall should happen release it according to instructions above.
n. Rapid decent manoeuvres
i. Spiral
The spiral dive is an effective way of making a fast descent. During the spiral dive the pilot and
glider will experience strong centrifugal forces which strain the glider. As such it should be
considered an extreme manoeuvre. Due to the rapid height loss during a spiral, pilots must
always take care that they have sufficient altitude before initiating the manoeuvre and that the
airspace is free around the pilot.
Initiation : Weight shift and smoothly pull on one brake (the same side you are weight shifting
into) so the glider goes from a normal 360-degree turn into a steep turn and from there into a
spiral dive. Once established in the spiral the descent rate and bank angle can be controlled
with weight shift and the releasing or pulling of inner brake. As the glider banks in front of the
pilot maintain the spiral by keeping the brake pressure constant, at this point weight-shift can
be neutralised. Descent is controlled by pulling more on the inner brake. A slight pull on the
outside brake helps to keep the glider stable.
Recovery : In general, we recommend exiting the spiral actively by weight shifting returns to
neutral, pulling slightly on the outside brake and releasing at the same time the inner-brake.