Incidents; Deep Stall / Parachutal Stall; Deflations; Cravats - Ozone Mantra Manuel

perform this manoeuvre near the ground.

Incidents

Deep Stall / Parachutal stall

It is possible for gliders to resume their normal shape on a very slow
release of the B-lines, but carry on descending vertically and without
full forward motion. This situation is called 'deep stall' or 'parachutal
stall'.
It is highly unlikely to happen on any OZONE glider, but should it
happen, your first reaction should be to fully raise both brakes and
the glider should return to normal flight. If nothing happens after a
few seconds, reach up and push the A-risers forwards or apply the
speeds bar to regain normal flight.
Ensure the glider has returned to normal flight (check your airspeed)
before you use the brakes again.
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!

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, or at least not to fly into them... Asymmetrical collapses can
be controlled by weight shifting away from the collapse and applying
a small amount of brake to control your direction. This act will most
of the time be enough for a full recovery of the wing.
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 do have a deflation which does not spontaneously reinflate,
make a long smooth progressive pump on the deflated side. This
pumping action should take about 2 seconds per pump. Pumping too
short and fast will not reinflate the wing and pumping too slow might
take the glider too close, or beyond, the stall point.
Symmetrical collapses reinflate without pilot input, however 15 to
20cm of brake applied symmetrically will speed the process. If you
simulate a symmetrical collapse during an SIV course it is important
to use both the A and Baby A risers and to pull evenly to induce a
symmetrical collapse. Use of just A risers or uneven pulling may lead
to the glider collapsing only in the centre section with the tips flying
forward to meet in the middle, leading to an increased risk of a cravat
occurring.
If your Mantra collapses in accelerated flight, immediately release the
accelerator to slow down to trim speed and after a 90 deg turn the
canopy will reinflate and return to normal flight.

Cravats

When the tip of your wing gets stuck in the lines, this is called a
'cravat'. This can make your glider go into a rotation which is difficult
to control. The first solution to get out of this situation is to pull down
the stabilo line (red line on the B riser), while controlling your
direction, you must be careful with any brake inputs not to stall the
opposite wing.
If this does not work, try pumping the cravated side (similar method
to asymmetric collapse), if this does not work a full stall is the only
other option .
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.
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