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32
classified as illegal aerobatics in some
countries!
Emergency Steering
If for some reason the UP Makalu Light
cannot be controlled with the brakes, for
example if the brake handle has come off
the main brake line, it can be steered and
landed with the rear risers. Be aware that,
when rear riser steering, the glider is a
great deal more responsive to pilot input,
and the stall happens very suddenly.
Further references
Rain-induced deep stall
There are two reasons why flying with a
wet wing increases the risk of deep
stalling:
First reason: A paraglider flying in
heavy rain will soon grow significantly
heavier and thereby undergo changes
in the centre of gravity and the angle
of incidence. This may lead to deep
stalls. Note that older wings will
absorb more water than newer ones
due to the coating on older wings being
more permeable
– this means that the
critical mass may be reached sooner on
older wings.
Second reason has to do with the actual
rain drops on the top surface
– if enough
large rain drops form that the entire top
surface is covered, but they don’t join
together to either flow off or become a
homogeneous mass, the surface may
become so rugged that the airflow
separates and the wing stalls.
This phenomenon has been observed
on hang-gliders and gliders for years
but only recently have we discovered
that paragliders may also be affected.
It is more likely to happen with new
wings where the cloth is still highly
hydrophobic and the drops thus do not
penetrate but remain on the surface.
We know from computer simulations
and practical tests that this is
physically possible but we also
suspect that it occurs very seldom in
real life flying.
In both cases the brakeline travel
becomes very short and even small
input may suddenly induce an airflow
separation; in some cases even a gust
or a sudden thermal may change the
angle of incidence enough to cause
the deep stall.
If
you
find
yourself
flying
in
unavoidable
rain
we
strongly
recommend that you avoid any sudden
movements or radical brakeline input,
that you do not pull Big Ears or B-stall,
and that you steer clear of turbulence
and avoid a deep flare on landing.
WARNING!
Avoid flying in
very humid air or in rain. A
wet canopy may have very
unpredictable
flying
characteristics,
one
of
which
is
a
radically
increased risk of deep stall!
Adhesive logos
Always make sure that your intended
logo will not in any way influence the
glider behaviour. If in doubt we
suggest avoiding the attachment of
advertising logos on the wing. UP
cannot be held responsible for any
mishaps caused by intentional after-
sales changes done to the
wing.
NOTE!
The use of heavy
and/or unsuitable sticky
material for logo work on
the
canopy
may
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