Dangerous situations and extreme flying
Section 07
33
paraglider and which can put the glider
under excessive stress.
Trimming the line lengths and canopy
material after safety training can lead
to a general deterioration in flight
characteristics.
Damage as a result of safety training is
not covered by the warranty.
Safety training and RAST
Most manoeuvres can be practised with
the NYOS RS during safety training in
the same way as with a glider without
RAST.
Only those manoeuvres for which the
glider must be actively collapsed
(asymmetric collapse, front collapse)
require higher forces to enter as a rule
than would be necessary with a glider
without RAST.
WARNING
Refrain from doing wingovers with the
glider to make a more large-scale
collapse possible.
A provoked collapse from a roll or
pitch
movement
can
lead
to
uncontrolled flight positions. Such
collapses are unrealistic and have no
training benefit.
Collapsing the paraglider
Asymmetric collapse
Asymmetric collapses are caused by the
stagnation point moving to the trailing
edge of the glider. A negative angle of
attack makes part of the canopy
collapse and tuck under, and the glider
may plunge down, turn away or spin.
Recovery
Should an asymmetric collapse occur,
counter-brake slightly on the side of the
glider that is still inflated to stop it
turning away and to stabilise it, until
the glider flies straight ahead again.
With large asymmetric collapses, it is
important to counter-steer carefully so
that the glider does not stall completely
and go into a full stall.
The part of the glider which has
collapsed
generally
re-inflates
automatically but this can be assisted
by applying light brake pressure on the
collapsed
side
(but
not
hectic
“pumping”) while counter-steering on
the opposite side. Make use of the full
braking distance.
Following a very large collapse of more
than 70%, the wing-tip of the collapsed
side may become trapped in the glider
lines. Here too counter-braking and
weight-shifting must be used to stop
the glider from turning away. The
trapped end can generally be opened by
a short, fast pull on the brake lines or
by pulling on the separate stabilo lines.
WARNING
Counter-steering too strongly on the
inflated side of the glider can result in
a stall and to further uncontrolled
flight
manoeuvres
(cascade
of
events).
Front stall
A negative angle of attack can also
cause part or all of the leading edge of
the glider to collapse.
Recovery
The NYOS RS will normally recover
quickly and automatically from a front
stall, but re-inflation can be assisted by
light symmetrical brake input. In the
case of extreme front stalls across the
entire wing chord, the wing tips may