L-Acoustics ARCS, Руководство оператора

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L-ACOUSTICS ARCS Manual V2.0 2/13/2003
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Figure 8: ARCOUPL
BUMP 3, LIFTBAR
Additional rigging elements used to fly an ARCS array. BUMP3 is assembled using locking nuts (with
cotter pin safeties) and a standard ARCOUPL bar. A shackle is then attached to BUMP3 and used as a
rigging point for the entire assembly (i.e., single point hang). Ten pick point holes are available on
BUMP3, and the pick point is selected according to the center of gravity for the array in order to
provide the desired overall tilt angle. Only one BUMP3 is required for flying an even number of
enclosures (up to 4), whereas two BUMP3 and one LIFTBAR are required for flying an odd number or
for more than 4 enclosures (up to 8). For larger configurations where ARCS is flown in the normal
(vertical) orientation, there should be no more than 4 ARCS enclosures (vertically or horizontally)
supported by a single BUMP3.
The rigging reference chart in Chapter 5 provides a table of array tilt angles for various BUMP3 and
LIFTBAR pick point combinations.
BUMP3
LIFTBAR
Figure 9: BUMP3, LIFTBAR Rigging Accessories