AirDesign Si, Руководство и сервисная книжка

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at this position allows the wing to refill slightly across the span. When releasing the brakes
without pre-filling the ears mostly will most probably hook in the lines and this can result in a
cravat.
After pre-filling the glider stabilizes its movements and the brakes can be leased until the glider
recovers speed and flies again.
ATTENTION : This manouver requires a lot of height and demands fast reactions and certain
skills to recover. We do not recommend executing this manoeuvre.
m. Rapid decent manoeuvres
i. Spiral
The spiral dive is an effective way of making a fast descent. During the spiral dive the pilot and
glider will experience strong centrifugal forces which strain the glider. As such it should be
considered an extreme manoeuvre. Due to the rapid height loss during a spiral, pilots must
always take care that they have sufficient altitude before initiating the manoeuvre and that the
airspace is free around the pilot.
Initiation : Weight shift and smoothly pull on one brake (the same side you are weight shifting
into) so the glider goes from a normal 360-degree turn into a steep turn and from there into a
spiral dive. Once established in the spiral the descent rate and bank angle can be controlled
with weight shift and the releasing or pulling of inner brake. As the glider banks in front of the
pilot maintain the spiral by keeping the brake pressure constant, at this point weight-shift can
be neutralised. Descent is controlled by pulling more on the inner brake. A slight pull on the
outside brake helps to keep the glider stable.
Recovery : The SuSi recovers from a spiral spontaneously as soon as the brakes are released
and weight shift returns to neutral. To exit, allow the spiral to slow down for a turn or two by
slowly releasing the inner brake. Once the glider starts to exit the spiral, control your descent
rate and bank angle with weight shift and the outer and/or inner brake to prevent any strong
climbs out of spiral. Always finish a spiral dive at a safe altitude.
The SuSi does not show any tendency for a stable spiral. That means the glider does not remain
in spiral after releasing the brakes. If the glider should, in rare cases, remain in a stable spiral
the pilot should first weight-shift to the outside and then brake slightly more on the outside.
ATTENTION : In a stable spiral the G-forces are very high. Be aware that it may therefore
require considerable more input and effort to recover from this state.
IMPORTANT SATEFY NOTICE ! A pilot who is dehydrated and/or not accustomed to spiralling
can lose consciousness during a steep spiral dive!
ii. B-line stall
This is an effective way of making a moderate to rapid descent but doesn’t allow any forward
speed.
Initiation : Take hold of the B-risers (both sides at same time) just above the maillons and
slowly but smoothly pull them down, twisting your hands until the canopy shows a span-wise
crease at the B-line attachment points and stops flying forward. It is difficult to pull at first but
becomes easier as the airfoil creases. Your sink rate will increase while your forward speed will
reduce to practically zero.