Full-Stall; Rapid Decent Manoeuvres; Spiral - Airdesign Susi 2 Betriebshandbuch Und Serviceheft

asymmetric collapse. Always wait for the glider to be in front of you or above you when
releasing a fully deployed spin - never release the spin while the wing is behind you because
the glider would dive very far in front of you or even underneath.
ATTENTION: This manouver requires a lot of height and demands fast reactions and certain
skills to recover. We do not recommend executing this manoeuvre.
l.
This is an extreme manoeuvre that should rarely, if ever, be required.
To induce a full stall, pull both brake-lines down smoothly. Hold them down, locking your arms
under your seat until the canopy falls behind you and deforms into a characteristic crescent
shape. In spite of how uncomfortable it may feel as the glider falls backwards, be careful not to
release the brakes prematurely or asymmetrically. If the brakes are released while the glider is
falling backwards the surge and dive forwards is very fast and the glider may shoot in front and
even underneath you.
In a full stall the canopy will oscillate back and forth. To stabilise this, the pilot can release the
brakes slowly and for approximately 1/3 of the brake travel and then hold at this level. Holding
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.
The available brake travel before stalling the wing depends on the size and the loading. For the
SuSi2 16,18 and 20 it is a minimum of 40cm. Those numbers are just a rough indication. (The
publication of the brake travel is claimed by the EN 926-2.)
It would be dangerous to use the brake travel according to those numbers, because it is not
practicable to measure the brake travel during flight, and in turbulences the stall might occur
with less brake travel. If you want to use the whole brake travel of your glider safely, it is
necessary to do many intended spins and full stalls to get a feeling for the stall behaviour.
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
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

Full-stall

i. Spiral
41