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25
collapses, happen more
dramatically at increased speed.
Therefore the speed system
should not be operated near the
ground or in noticeable
turbulence.
Turning
The UP Summit XC² is an agile glider and
reacts immediately to pilot input.
Brake input and amount of weight shift
induced will define the radius and bank
angle on the UP Summit XC², and will
allow it to be controlled with ease. Using
weight shift in combination with brake
input will result in flat turns with minimum
height loss and is in fact always the most
efficient control method. The radius of the
turn is then controlled with the brake line
whereas the bank is controlled through
weight shift.
If needed the UP Summit XC² will turn
very tight. To do this, apply some brake
input on both sides, then release the
outside brake whilst applying further brake
on the inside
– this will reduce turning
radius to a minimum.
When brake input is increased beyond
approximately 50% on one side, the UP
Summit XC² begins a fast and steep turn,
which can be made into a steep spiral
(refer to chapter heading "steep spiral").
Landing
The UP Summit XC² is easy to land. While
pointing into the wind, the pilot should fly
the wing fast until approximately one
meter above the ground, and then apply
both brakes completely. When landing in
stronger wind, less brake is required.
Landing from steep turns should be
avoided due to the risk of an uncontrolled
pendulum reaction.
Winch towing
The UP Summit XC² tows easily.
There are no special techniques that
need to be employed, but
consideration should be given to the
following points:
Especially when you are towing at
an unknown field, make sure that
you are fully aware of any local
conditions and peculiarities. Ask
the local pilots if you are at all
unsure.
During the launch, ensure that the
glider is completely inflated and
over your head before giving the
'start towing' signal. If the glider is
not central over your head do not
continue with the tow. Any
corrections attempted through the
brakes during this critical phase
may result in the canopy deflating
again, or in the tow progressing
with a non-flying wing; if tow
tension is applied when the glider
is not correctly positioned then a
'lock out' or a stall could occur.
Try to avoid large brake inputs
until you are reasonably high.
Emphasize weight shift if any
course correction is necessary
close to the ground.
Do not try to climb steeply during
the first part of the tow. Good
airspeed is essential.
Do not use a towline tension
greater than 90 daN at any time
during the tow.
All persons involved with the
towing operation should be
suitably qualified and
experienced. All equipment used
should, where necessary, be
certified, and a tow permit should
be valid for the field being used.
