Flown Systems; Standalone Flying With Dv-Bump - L-Acoustics dV-DOSC Operator's Manual

4.2 FLOWN SYSTEMS

Standalone Flying with dV-BUMP

Flying a dV-DOSC array is fast and easy. When properly prepared and organized, handling time can
be significantly reduced in comparison with conventional systems. Installation is optimum when 2-3
people are available although it is possible for a single person to fly dV-DOSC.
Preliminary Preparations:
All geometrical data for flying the array (i.e., trim height, bottom element elevation, inter-
element angles) has been pre-calculated using ARRAY 2000 (CUTVIEW sheet dVARRAY1 or
dVARRAY2)
Two independent flying points are available, directly in line and with the desired pan angle for
the array as determined using ARRAY 2000 (ISOCONTOUR sheet)
Alternatively, a single point hang can be performed using the points available on the central
spreader bar section of dV-BUMP or the rear extension bar
Access is available beneath the flying points, i.e., a flat surface where it is possible to assemble
dV-DOSC elements
Given the above conditions:
The first step is to unpack and organize all dV-DOSC elements and rigging hardware at the flying
location. As a reference for cabinet orientation, the front grille logos should all be in the correct
orientation and the bottom rigging tabs facing down once the system is flown.
Line up all dV-DOSC enclosures in their flight cases (3 per case). Mate the bottom rigging tabs from
the first group of 3 cabinets with the top locator slots of the next group of cabinets. Repeat until all
dV-DOSC flight cases are physically lined up.
Physically connect the fronts of all dV-DOSC enclosures by attaching the front points using dV-
PIN25. The entire assembly will then be linked, similar to how V-DOSC is attached using rotating
legs and U-pins (except the attachment points are at the front in this case).
Place dV-BUMP at the front of the array, oriented so that the dual locating studs are facing upwards
(or rear extension bar upwards). If desired, attach the extension bar to dV-BUMP using an 18 mm
shackle at pick point hole number 8 on the central spreader bar section. The extension bar allows
the use of two motors for tilt adjustment or single point hangs of up to 12 elements from the 8
additional points available on the extension bar. Note: 12 elements, tightly wrapped at 7.5 degrees
provide 90 degree coverage focussed from vertical to horizontal when the rearmost pick point of
the extension bar is used. If the extension bar is not used, 8 pick point positions are available on the
central spreader bar section of dV-BUMP for single point hangs and up to 24 dV-DOSC can be
flown.
Pre-attach dV-ANGLE P1 at the 3.75 degree (middle hole) position to the two rear points on dV-
BUMP using dV-PIN25. Pre-attach dV-ANGLE P1 at the 7.5 degree (smallest gap) position to the
front points on dV-BUMP. As a reference, the ball/tab end of all four dV-ANGLE should be facing
outwards.
Note : The 3.75 degree angle between the rear of the top enclosure and dV-BUMP is necessary to
compensate for the 3.75 degree trapezoidal angle of dV-DOSC versus the actual site angle of the enclosure
which is perpendicular to the front of the enclosure. Adding a 3.75 degree angle at the rear allows focus to
be verified with a laser attached to dV-BUMP since this will be parallel to the site angle of the top element.
The next step is to attach dV-BUMP to the top element by mating the pre-attached dV-ANGLE bars
to the locating slots of the top element. Use four dV-PIN25 to physically connect dV-BUMP to the
top element.
dV-DOSC dV-SUB Manual V2.0 Nov 2001 92