6
Trimmers
The Viper 3 is supplied with a trim riser set. See page 5.
The slow trim setting, with the trimmers fully pulled is the neutral
position. This is ideal for thermalling or when minimising sink rate.
Brake pressure is lighter and the handling is at its best in the neu
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tral or slow trim setting. Note, in this position the risers are NOT of
equal lengths.
The trimmers have 2 stitch lines; the first (lowest) white stitch line
is the best setting for the climb out, normal flight and for the best
inflation behaviour during take-off. This is especially useful in light
winds and/or at high altitudes.
To increase cruise speed you can use the speed system, further
release the trimmers, or do both. Using the speed system has
exactly the same effect as releasing the trimmers so it is safe and
possible to fly with the trimmers in the fully slow (neutral) position
whilst using the full range of the speed system.
The second RED stitch line is the limit for comfortable fast cruis
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ing and the limit for using the brakes without affecting stability too
much. You can still use the brakes and exceed this setting when
conditions are safe to do so, but in thermic or turbulent air we
recommend closing the trimmers to the slow or neutral position
or at least to the lowest white stitch line or accept a higher risk of
collapse.
In turbulent air the reflex profile is very stable. It will resist
reasonable levels of turbulence with a high resistance to collapse
without active pilot input. The faster the wing is flown the more in
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herent stability there is, as the reflex has a greater effect. In mild
turbulence it may be best to not attempt to fly the wing actively
and let the profile absorb the turbulence itself, indeed application
of the brakes whilst accelerated will reduce the inherent stability of
the profile. However in very strong turbulence Ozone recommends
to return the trimmers to the fully slow position and fly the glider
actively. This way, you will be in the best position to react correctly
should an incident occur.
NOTE: When the trimmers are fully pulled to the neutral
position the risers are NOT of equal lengths.
Accelerator System
The riser’s accelerator system now includes B riser pulleys. These
reduce the overall friction for a lighter, smoother action. The light
pressure allows for easier, more comfortable high speed cruising.
Using the speed system has exactly the same effect as releasing
the trimmers. Either can be used in any combination to accelerate
the wing, but be careful, fully accelerated with trimmers released
is very fast!
To set up the accelerator on the ground, ask a friend to pull your
risers into their in-flight position while you sit in your harness. Now
adjust the length of the line so that the main bar sits just beneath
your seat. You should now be able to hook your heel in to the sec
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ondary (lower) loop of the accelerator.
The accelerator must be slack enough to ensure that the front ris
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ers are not pulled down in normal flight, but not so long that it is
impossible to use the full range of the speed system. Ensure that
the speed bar is secured in place before take off to avoid fouling
the prop. Once set up, test the full range of the speed system in
calm flying conditions: ensure that both risers are pulled evenly
during operation. Fine-tuning can be completed when you are back
on the ground.
IMPORTANT: Using the accelerator decreases the angle of
attack and can make the gliders recovery from a collapse
more aggressive, therefore using the accelerator near the
ground or in turbulence should be avoided.
IMPORTANT: When fully accelerated directional control
should be maintained with the Tip Steering System. Do not
use the brakes.
