Niviuk Hook 5 User Manual

Niviuk Hook 5 User Manual Manual pdf 14 page image

14Initiating the maneuver is physically demanding because it can takesome strength to pull the risers down until the wing is deformed. Afterthis, 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 theconditions and how the manoeuvre is performed.To exit the manoeuvre, simultaneously release both risers. The wing willthen slightly surge forward and automatically return to normal flight. It isbetter to let go of the lines quickly rather than slowly.This is an easy descent technique to perform, but remember thatthe wing will stop flying, will lose all forward horizontal speed, andits reactions will change markedly when compared to a normal flightconfiguration.5.3 SPIRAL DIVEThis is a more effective way to rapidly lose altitude. Beware that the wingwill experience and be subjected to a tremendous amount of descendingand rotating speed (g-force), which can cause a loss of orientation andconsciousness (blackout). This manoeuvre must therefore be donegradually to increase one’s capacity to resist the g-force exerted onthe body. With practise, you will fully appreciate and understand it.Only practise this manoeuvre at high altitude and with enough groundclearance.To start the manoeuvre, first weight shift and pull the brake handlelocated on the inner side of the turn. The intensity of the turn can becontrolled by braking slightly using the outer brake handle.A paraglider flying at its maximum rotating speed can reach –20 m/s, orthe equivalent of a 70 km/h vertical descent, and will stabilise in a spiraldive from 15m/s onwards.Good enough reasons to familiarise yourself with the manoeuvre andunderstand how to exit it.To exit this manoeuvre, the inner brake handle (down side of the turn)must progressively be relaxed while momentarily applying tension to theouter brake handle opposite to the turn. The pilot must also weight shiftand lean towards the opposite side of the turn at the same time.The exit should be performed gradually and smoothly so that thechanges in pressure and speed can be noted.When exiting the spiral, the glider will briefly experience an asymmetricalacceleration and dive, depending on how the manoeuvre was carried out.Practise these manoeuvres at sufficient altitude and carefully.5.4 SLOW DESCENT TECHNIQUEThis technique allows descent without straining the wing or taxing thepilot. Glide normally while searching for descending air and begin to turnas if climbing in a thermal, but with the intention to sink.Common sense has to be used to avoid dangerous areas of rotor whenlooking for descending air. Safety first!