Niviuk KOYOT 4, User Manual

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involved in doing so, concerns many pilots who want to have a controlled 
rapid descent technique. For the above reasons we recommend using 
the 3B3 line from the B riser. 
This technique easily increases the descent rate without causing 
problems and without the risk of causing a collapse while maintaining 
high speed. 
How? Locate the “3B3” line on your risers and, as you would when 
applying big ears,  simply pull down firmly and smoothly until you see 
both wingtips drop back slightly. The forward speed of the glider speed 
will then reduce slightly, quickly stabilise and then increase. You will then 
experience a descent rate of around 5-6m/s. 
We recommend the application of the speed bar whilst using this 
technique. Controlled turning of the wing can easily be maintained by 
weight shifting, exactly the same as you would with big ears. During this 
manoeuvre, the first sensation is a decrease in relative wind and a slight 
backwards inclination of the wing, as if going backwards. 
To exit the manoeuvre release the lines as you would with big ears, 
control the pitch and the wing will quickly adopt normal flight. This new 
technique allows a comfortable and controllable rapid descent without 
the risk of experiencing a cravat.  It is very comfortable and makes 
turning simple.  We advise you to first try this technique in smooth 
conditions with sufficient altitude above appropriate terrain. 
This is a new controlled descent technique that only needs a little 
practise to be executed with total comfort and effectiveness.

5.3 B-LINE STALL

When carrying out this manoeuvre, the wing stops flying, loses all 
horizontal speed and the pilot is no longer in control of the KOYOT 4.  
 
The airflow over the profile 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.

Initiating the maneuver is physically demanding because it can take 
some strength to pull the risers down until the wing is deformed. After 
this, the physical effort is less. Continue to hold the risers in position.
Once the wing is deformed, its horizontal speed will drop to 0 km/h; 
vertical descending speed increases to –6 to –8 m/s, depending on the 
conditions and how the manoeuvre is performed.

To exit the manoeuvre, simultaneously release both risers. The wing will 
then slightly surge forward and automatically return to normal flight.  It is 
better to let go of the lines quickly rather than slowly. 

This is an easy descent technique to perform, but remember that 
the wing will stop flying, will lose all forward horizontal speed, and 
its reactions will change markedly when compared to a normal flight 
configuration.

5.4 SPIRAL DIVE

This is a more effective way to rapidly lose altitude. Beware that the wing 
will experience and be subjected to a tremendous amount of descending 
and rotating speed (g-force), which can cause a loss of orientation and 
consciousness (blackout). This manoeuvre must therefore be done 
gradually to increase one’s capacity to resist the g-force exerted on 
the body. With practise, you will fully appreciate and understand it. 
Only practise this manoeuvre at high altitude and with enough ground 
clearance.

To start the manoeuvre, first weight shift and pull the brake handle 
located on the inner side of the turn. The intensity of the turn can be 
controlled by braking slightly using the outer brake handle.

The KOYOT 4 flying at its maximum rotating speed can reach –20 m/s, or