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Rigging Manual
10.2 WHEN TO USE A PULL-BACK
The use of a pull-back is common when the center of gravity (CoG) of an array falls outside the footprint of the array frame. Typically, long
curved arrays with a large downtilt qualify for this condition. When this occurs, LAC-3 displays an error to indicate that the array frame
alone cannot achieve the down angle needed for the design (Example 1 - No pull-back). Using an SRX900LA PB will shift the array CoG
between the two suspension points, enabling almost any down angle to be achieved (Example 2 - With pull-back).
Center of Gravity
Suspension Points
Invalid CG Location
Example 1 - No pull-back
Example 2 - With pull-back
Center of Gravity
Suspension Points
