Fly bar suspension and angle setup (centre of gravity)
The first figure 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 software suggests the ideal suspension
pinpoint taking into account this behaviour: fix the straight shackle in this position.
Note that the ideal aiming angle often doesn’t correspond to the pinpoint: there is often a little difference between ideal aiming and real aiming
and its value is the remaining angle: positive remaining angle can be adjusted a little using two ropes, negative remaining angle are self adjusted
a little because the cables weighs on the back of the array. With some experience it’s possible to consider preventively these required little
adjustments.
During the flown set up you can connect the elements of
the array to their cables. We suggest to discharge the weight
of the cables from the flying pinpoint by tying them with a
textile fibre rope, instead of letting them hang freely: in this
way the position of the array will be much more similar to
the simulation produced by the software.
Pin locking and splay angles set up
The figure 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 essential to obtain current weather and wind information. When
loudspeaker arrays are flown in an open-air environment, possible wind effects must be taken into
account. Wind load produces additional dynamic forces acting on the rigging components and the
suspension, which may lead to a dangerous situation. If according to the forecast wind forces higher than
5 bft (29-38 Km/h) are possible, the following actions 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 static load in
order to withstand any additional dynamic forces.
WARNING!
Flying loudspeakers overhead at wind forces higher than 6 bft (39-49 Km/h) is not recommended.
If the wind force exceeds 7 bft (50-61 Km/h) there is a risk of mechanical damage to the components
which may lead to a dangerous situation for persons in the vicinity of the flown array.
- Stop the event and make sure that no person remains in the vicinity of the array.
- Lower and secure the array.
CENTRE OF GRAVITY
KPTAX2012P FLY BAR FOR FLOWN ARRAY
SINGLE PINPOINT FOR
STRAIGHT SHACKLE
KPTAX2012P FLOWN PINPOINT
< 0°/10°
< 0,5°/6,5°
Even degrees
Odd degrees
1°
3°/0,5°
5°/2,5°
7°/4,5°
9°/6,5°
0°
2°
4°/1,5°
6°/3,5°
8°/5,5°
10°
Block cam
hole
Block cam
hole >
1° >
3° >
5° >
7° >
9° >
< 2°
< 4°
< 6°
< 8°
< 10°
Degrees
indicator >
Pin
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.
1° STEP HOLE
0,5° STEP HOLE
press and
insert
release and
lock
95AXM014 LOCKING PIN
press and
insert
release and
lock
95AXM014 LOCKING PIN
