Ozone Ultralite 4, Руководство пилота, Страница: 10 / 18

INCIDENTS IN FLIGHT
EN
15
14
WARNING
Uncoordinated
wingovers can lead
to large asymmetric
collapses and cravats,
therefore they should
never be executed
near the ground.
Deflations
Due to the flexible form of a paraglider, turbulence may cause a portion of the wing suddenly to collapse.
This can be anything from a small 30% (asymmetric) collapse to a complete (symmetric) collapse.
If you have a collapse, the first thing to do is to control your direction. You should fly away from the ground
or obstacles and other pilots. Asymmetric collapses should be controlled by weight shifting away from the
collapse and applying enough brake to control your direction. This action alone will be enough for a full
recovery of the wing most of the time.
Once a glider is deflated it is effectively a smaller wing, so the wing loading and stall speed are higher. This
means the glider will spin or stall with less brake input than normal. In your efforts to stop the glider turning
towards the collapsed side of the wing you must be very careful not to stall the side of the wing that is still
flying. If you are unable to stop the glider turning without exceeding the stall point then allow the glider to
turn whilst you reinflate the collapse.
If you have a deflation which does not spontaneously reinflate, make a long smooth progressive pump
on the deflated side. This pumping action should take about 1-2 seconds per pump. Pumping too short
and fast will not reinflate the wing and pumping too slow might take the glider close to, or beyond, the
stall point.
Symmetrical collapses reinflate without pilot input, however 15 to 20cm of brake applied symmetrically will
speed the process. After a symmetric collapse always consider your airspeed. Make sure the glider is not
in parachutal stall before making any further inputs.
If your Ultralite 4 collapses in accelerated flight, immediately release the accelerator and manage the
collapse using the same methods described above.
Cravats
If the tip of your wing gets stuck in the lines, this is called a ‘cravat’. This can make your glider go into
a spiral, which is difficult to control. The first solution to get out of this situation is to stabilise the glider
into normal flight, i.e get control of your direction and then pull down the stabilo line (CR4 - outside line
on the C riser) until the wing tip clears. You must be careful with any brake inputs or you may stall the
opposite wing. You can also use strong deep pumps of the brake on the cravated side, when doing so it
is important to lean away from the cravat otherwise you risk spinning or deepening the spiral. The aim is
to empty the air out of the wing tip, but without spinning. Correctly done, this action will clear the cravat.
If it is a very large cravat and the above options have not worked then a full stall is another option. This
should not be attempted unless you have been taught how to do it and can only be done with a large
amount of altitude. Remember if the rotation is accelerating and you are unable to control it, you should
throw your reserve parachute whilst you still have enough altitude.
Deep Stall / Parachutal Stall
It is possible for gliders to enter a state of parachutal stall. This can be caused by several situations
including; a very slow release from a B-line stall; flying the glider when wet; or after a front/symmetric
deflation. The glider often looks as though it has recovered properly but carries on descending vertically
without full forward motion. This situation is called ‘deep stall’ or ‘parachutal stall’.
It is unlikely to happen on any Ozone glider, but should it do so your first reaction should be to fully raise
both hands. This normally allows the glider to return to normal flight but If nothing happens after a few
seconds, reach up and push the A-risers forwards or apply the speed bar to encourage the wing to regain
normal flight. Ensure the glider has returned to normal flight (check your airspeed) before you use the
brakes again.
Do not fly in rain, doing so significantly increases the likelihood of parachutal stalls occurring. To reduce
the chance of stalling in rain avoid using deep brake movements or Big Ears. Find a safe area to land and
using the speed bar, maintain a good airspeed at all times.
IMPORTANT
Only a few cms of
input from your
brakes can maintain
your wing in the stall.
Always release your
wraps if you have
taken them!
IMPORTANT
A bad preparation
on launch, aerobatic
flying, flying a wing of
too high a level or in
conditions too strong
for your ability, are
the main causes of
cravats.
IMPORTANT
Never fly in the rain or
with a wet glider