20
SUSPENDED INSTALLATION USING KPTAX16CL FLYBAR
Using the
KPTAX16CL
fly bar it is possible to assemble a suspended and unobtrusive vertical
array system with a variable size up to 6 elements of AX16CL, or a combination of AX16CL and
AX8CL, without exceeding the
120Kg maximum load capacity
. The loudspeakers are linked
together in a column using the brackets integrated at each end of the enclosure. Each system
can be set properly both acoustically and mechanically using the aiming software.
Each loudspeaker box is fixed to the next one using the two locking pins. The locking pin in the
front does not require any adjustment, while the locking pin in the back is used to adjust the
splay angle between two adjacent loudspeakers in the array column at 0° or 2°.
Follow the sequence in the figure for fixing the flybar to the first box. Usually this is the first
step before lifting up the system. Be careful to insert properly the shackle (1)(2) and the locking
pins (3)(4) in the right holes specified by the aiming software.
When lifting the system always proceed gradually step by step, paying attention to secure the
flybar 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.
The centre of gravity of an AX16CL/AX8CL array depends on the number of units and on the
splay angle between the units, when the units are arranged to make an arc for the best coverage
of the audience. Use always the aiming software to define the correct suspension pinpoint
where to fix the straight shackle and the optimal splay angle between units.
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 Delta angle: positive
delta angle can be adjusted a little using two ropes, negative delta angle are self adjusted a
little because the cables weights 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, for this reason a ring is present at the end of the flybar that can be used to fix the cable
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.
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.
WARNING!
AX16CL and AX8CL must be suspended only using the flying bar KPTAX16CL, with a
maximum of 120Kg per flying bar.
1
2
3
4
5
6
