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Emergency Steering
If for some reason the UP Summit XC²
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
homogenous mass, the surface will
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 BigEars 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 compromise the
certification and lead to the
aircraft becoming unsafe to fly
Overloading
The UP Summit XC² is a very strong
paraglider, and flying all the usual SIV
Содержание Summit XC2
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