Follow the sequence in the
fi
gure for
fi
xing the
fl
y bar at the
fi
rst
box. Usually this is the
fi
rst step before li ing up the system. Be careful
to insert properly all the locking pins (1)(2) and (3)(4) then the shackle
(5) in the right holes as speci
fi
ed by the aiming so ware.
When li ing the system always proceed gradually step by step, paying
a en on to secure the
fl
y bar to the box (and the box to the other boxes)
before pulling up the system: this makes easier to insert properly the
locking pins. Also when the system is released down, unlock gradually
the pins. During the li ing be very careful to not let the cables enter the space between one enclosure and the other, as their compression could
cut them.
Fly bar suspension and angle setup (centre of gravity)
The figure at the top of this page shows where the normal
centre of gravity is with one box or several boxes arranged in
a line. Usually the boxes are arranged to make an arc for the
best coverage of the audience, so the center of gravity moves
backward. The aiming so ware suggests the ideal suspension
pinpoint taking into account this behaviour:
fi
x the straight shackle
in this posi on.
Note that the ideal aiming angle o en doesn’t correspond to the
pinpoint: there is o en a li le di
ff
erence between ideal aiming and
real aiming and its value is the Delta angle: posi ve delta angle
can be adjusted a li le using two ropes, nega ve delta angle are
self adjusted a li le because the cables weighs on the back of the
array. With some experience it’s possible to consider preven vely
these required li le adjustments.
During the
fl
own set up you can connect the elements of the array
to their cables. We suggest to discharge the weight of the cables
from the
fl
ying pinpoint by tying them with a tex le
fi
bre rope,
instead of le ng them hang freely: in this way the posi on of the
array will be much more similar to the simula on produced by
the so ware.
Pin locking and splay angles set up
The
fi
gure below shows how to insert correctly the locking pin and
how to set up the splay angle between loudspeakers.
Wind loads
When planning an open-air event it is essen al to obtain current weather and wind informa on. When
loudspeaker arrays are
fl
own in an open-air environment, possible wind e
ff
ects must be taken into account.
Wind load produces addi onal dynamic forces ac ng on the rigging components and the suspension, which
may lead to a dangerous situa on. If according to the forecast wind forces higher than 5 b (29-38 Km/h)
are possible, the following ac ons have to be taken:
- The actual on-site wind speed has to be monitored permanently. Be aware that wind speed typically
increases with height above ground.
- Suspension and securing points of the array should be designed to support double the sta c load in order
to withstand any addi onal dynamic forces.
WARNING!
Flying loudspeakers overhead at wind forces higher than 6 b
Ō
(39-49 Km/h) is not recommended.
If the wind force exceeds 7 b (50-61 Km/h) there is a risk of mechanical damage to the components
which may lead to a dangerous situa on for persons in the vicinity of the
fl
own array.
- Stop the event and make sure that no person remains in the vicinity of the array.
- Lower and secure the array.
95AXM014 LOCKING PIN
press and
insert
release and
lock
KPTSW215 FLY BAR FOR FLOWN ARRAY
CENTRE OF GRAVITY
HINGE BAR OF PREVIOUS BOX
LOUDSPEAKER SPLAY ANGLES SET UP
USE THIS HOLE TO LOCK THE
HINGE BAR WHEN THE
LOUDSPEAKER IS REST
LOCK THE PIN IN THE
HOLE TO OBTAIN THE
REQUIRED SPLAY
ANGLE.
SINGLE PINPOINT FOR
STRAIGHT SHACKLE
KPTSW215 FLOWN PINPOINT