Ozone Ultralite 4, Руководство пилота, Страница: 9 / 18

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B-Line Stall
B-stall is for fast descents in emergency situations only. It is faster and safer to lose altitude with a spiral
dive than a B-stall.
To initiate the B-stall, keep the brakes in your hand and take hold of both the B risers, or place your fingers
between the lines above the maillons. As you pull the B-lines down the airflow over the wing is broken
and the glider loses its forward speed but remains open with a reduced cord. You can descend at around
6 m/s.
To exit the B-stall the B-risers should be released symmetrically and in one smooth, progressive motion.
The glider will resume normal forward flight without further input. Check you have forward flight again
before using the brakes.
If you pull too much B-line the glider may horseshoe and move around a lot. If this occurs, slowly release
the B lines until the wing stabilises or simply exit the B line stall by immediately release the B risers. Do not
attempt to maintain a B line stall that is not stable.
Spiral Dives
If you turn your glider in a series of tightening 360’s it will enter a spiral dive. This will result in rapid height
loss. To initiate a spiral, look and lean in to the direction you want to go, then smoothly pull down on the
inside brake. The Ultralite 4 will first turn almost 360 degrees before it drops into the spiral. Once in the
spiral you should re-centre your weight shift and apply a little outside brake to keep the outer wing tip
pressured and inflated.
Safe descent rates of more than 8m/s (1600 ft/min approx.) are possible in a spiral dive, but at these rates
the associated high speeds and G-forces can be disorientating. Always pay particular attention to your
altitude. To exit the spiral dive, ensure your weight shift is in a centred position and then smoothly release
the inside brake. As the Ultralite 4 decelerates allow it to continue to turn until enough energy is lost for it
to return to level flight without an excessive climb and surge.
IMPORTANT
The pitching movement
on exiting the B stall is
small but necessary.
We recommend you do
not brake the glider
until you are sure that
the glider is flying
properly again.
IMPORTANT
Always be prepared
to pilot the wing out
of a spiral dive. Use
opposite weight shift
and apply enough
outside brake to
stop the wing from
spiralling.
The Ultralite 4 shows little tendency to remain stable in a spiral dive; however some parameters could
interfere with its behaviour. These might include: wrong chest strap settings, total weight in flight outside
of the certified weight range, or being in a very deep spiral at a very high sink rate >14m/s. You should
always be prepared to pilot the wing out of such a spiral dive. To do so, smoothly use opposite weight
shift and apply enough outside brake to stop the wing from spiralling, the glider will then start to resume
normal flight. Never attempt to recover from a spiral with hard or quick opposite inputs as this will result
in an aggressive climb and surge.
Active C Riser Control
When gliding in accelerated flight it is possible to pilot the wing with the C risers, this gives an improved
feel and control over the wing enabling you to fly actively without using the brakes. Using brakes whilst
accelerated causes drag which is not only inefficient but it also reduces the inherent stability of the profile
- using the brakes whilst accelerated can actually lead to a collapse. Using the C risers increases the
angle of attack more evenly across the chord and does not weaken the profile. The direct feel allows you
to stop collapses before they happen and maintain higher speeds and higher levels of efficiency through
turbulence.
To fly with the C risers, keep hold of your brake handles (remove any wraps) and take hold of the C risers.
With the C risers you can fly actively through turbulence; If you see or feel the leading edge lose pressure,
at the same time as releasing some or all of the accelerator you can also apply pressure to the C’s, this
will help keep the nose open. Be careful to use only small inputs with the C risers, you risk stalling part or
all of the wing if you are over enthusiastic. The amount of pressure and size of the input is dependent on
the amount of turbulence/loss of pressure, but always be gentle at first. Learn the feel of the wing - how
much speed bar to release and the force required on the C’s to keep the nose open without inducing
unnecessarily large pitch movements.
Be prepared for plenty of practice as this new method may take some time for it to become totally intuitive,
efficient and comfortable. This control method is suitable for gliding in good ‘normal’ air, it does not
replace proper active flying with the brakes in strong turbulent conditions. If you are unsure about the air
return the glider to trim speed, release the C risers and fly the glider actively with the brakes.
IMPORTANT
Never apply the brakes
whilst using the speed
system - it makes the
wing more prone to
collapse.