B-Line Stall - Ozone SPARK Manuel

the high forces applied to the lower lines could exceed the break-
ing strain of the lines leading to equipment failure!
Ozone does not recommend the use of this manoeuvre!
Wingovers
The OZONE Spark is not designed for aerobatic flying. The limit
is tightly banked S-turns, commonly known as wingovers. These
must not exceed 90 degrees of bank.
Warning: Uncoordinated wingovers can lead to large asym-
metric collapses, even cravats and therefore should never
be executed near the ground.

B-Line Stall

B-stall is for fast descents in emergency situations only. B-stall is
performed by symmetrically pulling down on the B-risers.
To initiate the B-stall place your fingers between the lines above
the maillons on the B risers. Do not release the brake handles. As
you pull the B-lines down the airflow over the wing is broken and
the glider loses its forward speed but remains open and you will
descend at around 6 m/s.
If you pull too much B-line the glider may horseshoe and move
around a lot.
To exit the B-stall the B-risers should be released symmetrically
and in one smooth, progressive motion. The glider will resume nor-
mal forward flight without further input. Check you have forward
flight again before using the brakes.
IMPORTANT: The pitching movement on exiting the B stall
is small but necessary. We recommend you do not apply
brake to the glider until you are sure that the wing is flying
fully again.
The load applied on the B lines during this manoeuvre is not very
good for your wing; only use it in emergency situations.
Spiral Dives
If you turn your Spark 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 Spark will first turn almost 360
degrees before it drops into the spiral. Once in the spiral you must
apply a little outside brake to keep the outer wing tip pressured and
inflated.
Safe descent rates of 8m/s (1500 ft/min approx.) are possible in
a spiral dive, but at these rates the associated high speeds and
G-forces can be disorientating, so pay particular attention to your
altitude.
To exit the spiral dive, return your weight shift to a central position
and then slowly release the inside brake. As the Spark decelerates
allow it to continue to turn until enough energy is lost for it to re-
turn to level flight without an excessive climb and surge. The Spark
shows no tendency to remain locked in a spiral dive; however
some parameters could interfere with its behaviour. These might
include: wrong settings of the chest strap (too wide); total weight
in flight outside of the certified weight range, or being in a very
deep spiral at a very high sink rate. 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 a small amount of outside brake
and the glider will 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.
IMPORTANT: Spiral dives with sink rates over 8 m/s are
possible, but should be avoided. They are dangerous and
put unnecessary strain on the glider. Spiral dives cause
disorientation and need time and height to recover. Do not
perform this manoeuvre near the ground.
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