Vers.1.0 S. 15 / 30
As you pull the risers down, the gliders stops its forward motion and after a
pendulum swinging motion, the PRION enters a very stable stall state. The sink
rate depends on the wing loading and on how much the pilot pulls the B-risers.
The maximum sink rate is about 8m/s.
If you pull too far, the glider starts to rotate about the yaw axis. In this case,
release the risers, until the rotation stops. (Please note, that such a rotation can
also be induced by an asymmetric pulling of both risers)
To exit the B-stall, raise up both hands speedily.
Keep the brake handles (without extra wraps) in your hands during the
manoeuvre. Make sure to not apply brakes during the exit!
Deep spiral
The deep spiral is the most demanding of the three manoeuvres. (Ears, B-Stall
and Deep Spiral) You should only practise it with a lot of altitude. The best
way is to learn it under professional guidance.
Entering a deep spiral can be divided into two phases:
First, you fly a turn by applying one brake and by shifting your weight to the
same side, the glider will bank up and increase its turning speed. This phase
ends at a sink rate of roughly 8m/s – 10m/s. (depending on the wing loading)
Then at the beginning of the second phase the g-forces increase rapidly and the
leading edge will lean towards the ground. In a fully developed deep spiral, the
leading edge is almost parallel to the ground. The maximum sink rate with the
PRION can get up to 20m/s and more.
The first attempts to fly a deep spiral should be stopped clearly before reaching
the second phase to get used to the quick rotation and to practice the exit
without pendulum swinging. The exit should be performed by simply releasing
the inner brake with a neutral weight-shift. The PRION will then decrease its
bank angle and go back to normal flight. To avoid a pendulum movement, the
inner brake has to be pulled in the moment the wing wants to reduce its bank
rapidly.
By applying the inner brake again, you force the glider to exit the spiral
movement not rapidly but during two or three rotations. It is very important to
master this exercise before continuing to the second phase of the deep spiral.
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