7 Pilot’s manual for BiGolden4
5.3. SIV manoeuvres
No matter what category of canopy you fly or what level of certification it has, in turbulence or in strong thermals
you may experience all kinds of collapses. BiGolden4 behaves comfortably in these situations. Indeed not only does
the glider deal with extreme flight situations automatically, but it also offers – for its category – an above-average
degree of safety. Even so, you must follow all safety rules when practising SIV. Always pay attention to your altitude.
Before performing any SIV manoeuvre remember:
All SIV manoeuvres with tandem, e.g. full stalls and spins, are more challenging because of much higher
energy and forces in the brake lines than for single glider!
Acrobatic style of flying is not recommended for Bigolden4.
Practise throwing your reserve on the ground, in a simulator, so that reserve deployment is efficient and
automatic.
Rapid altitude loss and considerable rotational forces may develop during unstable manoeuvres. Take account
of these factors when throwing your reserve.
5.3.1. Asymmetric Collapse – one side of the canopy collapses
Initiation: Grab the outer A-line on one side and pull it down smoothly. The wing tip will collapse to form a
characteristic Big Ear. The size of the ear depends on the depth to which the lines are pulled. You can stop any turn
tendency by applying the opposite brake and by weight shifting onto the inflated side of the canopy.
Recovery: Under normal conditions BiGolden4 will reinflate spontaneously when the pulled lines are released.
Inflation time and loss of altitude can be reduced by suitable piloting. To stop any tendency to turn off course pull
the brake on the inflated side (be careful not to overreact and stall the inflated side) and weight shift to that side. If
the collapse remains then reinflate the collapsed side by ‘pumping’ the brake on the collapsed side.
CAUTION: It is very important to execute this manoeuvre very carefully. Due to the high compactness of the leading
edge and collapse resistance it is quite difficult to find a right degree of pulling of A-risers down. This applies
particularly to the asymmetric collapse of 75% at full speed!
5.3.2. Full Frontal Collapse
Initiation: Grab both A-risers at the top and pull them down fluently until the leading edge collapses.
Recovery: Recovery time depends on how much of the canopy has collapsed. In normal conditions BiGolden4 will
recover into normal flight automatically as soon as the front risers are released. Applying the brakes on both sides
simultaneously can help reopen the paraglider.
CAUTION: It is very important to execute this manoeuvre very carefully. Due to the high compactness of the leading
edge it is quite difficult to find a right degree of pulling of A-risers down. If you pull them down too quickly, a massive
collapse could happen!
5.3.3. Deep stall
Initiation: Pull both brakes smoothly until the sink rate increases markedly and the forward speed reaches almost
zero. The pull on the brakes should be controlled so that the canopy stays inflated and doesn't fall back into a full
stall.
Recovery: BiGolden4 cannot stay in deep stall flight, so after the brakes are released the glider automatically returns
to normal flight. If you need to, you can accelerate recovery by pulling hard on both brakes, followed by a fast
release. Or you can pull lightly on the A-risers.
CAUTION: If you pull too hard on the A-risers you may experience a full frontal collapse.
5.3.4. Full stall
Initiation: Wind the control lines once or twice around your hands and pull both of them down smoothly. Hold them
down until the canopy falls behind the pilot and deforms into a characteristic crescent shape. Hold your hands firmly
(press them underneath the seat) and be careful that you do not release the brakes prematurely or asymmetrically.
Recovery: BiGolden4 recovers from a full stall automatically once the brakes are smoothly released. During correct
recovery from a full stall BiGolden4 shows no extreme tendencies such as diving in front of the pilot. If the brakes
are released prematurely or too quickly there is a possible tendency for the glider to dive ahead of the pilot. This
can be corrected by adequate simultaneous braking on both-sides.
CAUTION: When exiting a Full Stall, if the brakes are released asymmetrically the glider may suffer a massive
asymmetrical collapse followed by a tendency to enter a spin.
5.3.5. Spin
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