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DUAL 2 manual EN version 7 February 2020
hold of the top of the B-risers, one in each hand, and pull them down by around 50 cm. This will stall the canopy and
forward speed will drop to zero. Make sure you have plenty of ground clearance because the descent rate can be
over 10 m/sec. To increase the descent rate pull harder on the B-risers. When you release the B-risers the canopy will
automatically start flying again, normally within two seconds. Sometimes the canopy will turn gently when it exits from
the B-line stall. It is normally better to release the B-risers fairly quickly rather than slowly, as the latter may result in the
canopy entering deep stall.
Always release the risers symmetrically, as an asymmetric release from a B-line stall may result in the glider entering
a spin. B-line stalls are useful if you need to lose a lot of height quickly, perhaps to escape from a thunderstorm. They
should not be performed with less than 100 m of ground clearance (see also also Chapter 5).
Spiral Dive
A normal turn can be converted into a strong spiral dive by continuing to apply one brake. The bank angle and speed of
the turn will increase as the downward spiral is continued. Be careful to enter the spiral gradually as too quick a brake
application can cause a spin or an over-the-nose spiral.
If the pilot increases the descent rate of the spiral to over 16 m/s or initiates what is known as an over-the-nose spiral,
the glider may require pilot input to recover. In this case all the pilot needs to do is to apply some outside brake and
steer the glider out of the turn.
The over-the-nose spiral is a special type of spiral dive where the glider points almost directly at the ground. It will enter
this if you make a sudden brake application during the spiral entry so that the glider yaws around. The nose of the glider
ends up pointing at the ground, after which it picks up speed very quickly. This technique is very similar to SAT entry
technique, and like the SAT it is an aerobatic manoeuvre, which is outside the normal safe flight envelope. Please do not
practise these manoeuvres as they can be dangerous.
Care should be taken when exiting from any spiral dive. To pull out of a steep spiral dive, release the applied brake
gradually or apply opposite brake gradually. A sharp release of the brake can cause the glider to surge and dive as
5. Flight Characteristics
