AirDesign RISE 3, Manual And Service Book

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n. Deep/Parachutal Stall
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 . 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.)
o. 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, you must
always take care that they have sufficient altitude before initiating the manoeuvre, and that
the airspace is free around you.
Initiation : Shift your weight 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 the inner brake. As the glider banks
in front of you maintain the spiral by keeping the brake pressure constant; at this point weight-
shift can be neutralized. Descent is controlled by pulling more on the inner brake. A slight pull
on the outside brake helps to keep the glider stable.
Recovery : The RISE3 recovers from a spiral spontaneously, as soon as the brakes are released
and weight shift to the outside-turn. To exit, allow the spiral to slow down for a turn or two by
slowly releasing the inner brake and at same time put little brake on the outside. Once the
glider starts to exit the spiral, control your descent rate and bank angle with weight shift and
the outer and/or inner brake, to prevent any strong climbs out of the spiral. Always finish a
spiral dive at a safe altitude.
The RISE3 does not show any tendency for a stable spiral. That means the glider does not
remain in spiral after releasing the brakes. If the glider should, in rare cases, remain in a stable
spiral, you should first weight-shift to the outside and then brake slightly more on the outside.
A spiral can become locked due to a variety of reasons including the following:
• Chest strap is too narrow