Niviuk Hook 5 - 5. Losing Altitude; 5.1 Big Ears; 5.2 B-Line Stall

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5. LOSING ALTITUDE
Knowledge of different descent techniques could become vital in
certain situations. The most suitable descent method will depend on the
particular situation.
To become familiar with the manoeuvres described below, we
recommend practising within the environment of a licensed training outt.
5.1 BIG EARS
The “Big ears” is a moderate descent technique, able to increase the sink
rate to –3 or –4 m/s and reduces the ground speed by 3 to 5 km/h. The
angle of attack and effective wing-loading will also increase due to the
smaller surface area of the wing.
Standard technique
To perform the ‘Big ears’ manoeuvre, take the outermost line on each
A-riser (the 3A3 line on the HOOK 5) and simultaneously, smoothly pull
them outward and downward. The wingtips will fold in
To re-establish forward speed and the correct angle of attack, accelerate
once the ears are pulled.
Keep the ears pulled in until you have lost the desired altitude.
Let go of the lines to re-inate the tips automatically. If they do not, try
progressively pulling one brake then the other. Asymmetric reopening
is recommended in order to avoid compromising the angle of attack,
particularly ying near the ground or in turbulent conditions.
Beware of the risk of stalling!
The action of reaching for the outermost A-lines (3A3 lines) to pull the
ears, can inadvertently mean pulling the brakes. The same can happen
when we are holding the tips down with the outermost A-lines (3A3 lines),
it is possible to accidentally affect the brakes. This can obviously lead to
a signicant speed decrease.
In paragliders with a very pronounced arc, pulling big ears means an
increase in drag. On a very arched wing, the ears do not fold, they just
hang. The increase of drag is more pronounced than on wings with a less
pronounced arc.
The HOOK 5 is designed with little chord, which is good in normal ight
conditions. However, this same damping is what can cause us to have
problems to regain normal ying speed after a high increase of the angle
of attack and the added drag of the ears.
These particularities, together with turbulent thermic conditions, could
cause an unintentional stall.
The solution: big ears may still be applied but you must be fully aware
of the above-mentioned points and act accordingly. To avoid the stall,
simply use half speed-bar (this is sufcient) to increase the speed and
decrease the angle of incidence. This should allow you to maintain
sufcient speed to prevent the stall. Take care not to pull the brakes while
making the ears as this will make a stall more likely!
5.2 B-LINE STALL
When carrying out this manoeuvre, the wing stops ying, loses all
horizontal speed and the pilot is no longer in control of the paraglider.
The airow over the prole is interrupted and the wing enters a situation
similar to parachuting.
To enter this manoeuvre, the B-risers are gripped below the maillons and
symmetrically pulled down together (approx. 20-30 cm) and maintained
in that position.