Feasibility Tests for 400m Offset Zeroing the 25mm Gun of the Bradley Fighting Vehicle

摘要

Researchers developed a short-range zeroing procedure and target for the Bradley Fighting Vehicle's 25mm gun to minimize the negative impact of factors such as inaccurate boresight equipment, ammunition dispersion, and poor feedback of hit location, which affect zeroing conducted with standard procedures. A 400m target offset aiming point for the sight and gun to (a) account for parallax, and (b) allow for the line of sight and aim of the gun to cross at 1,000 to 1,200 m. Sight alignment for zeroing was based on the center of a three round-shot group for training ammunitions. With the experimental procedure and target, gunners detected holes in the target and were able to perform accurate sight alignment following boresighting with either accurate or inaccurate equipment. Location of shot-group centers on a 1,000m target indicated that the gun was zeroed. Short-range zeroing has potential benefits in both training and combat when conditions are not optimal for standard zeroing. Keywords: 25mm automatic gun; Bradley fighting vehicle; Zeroing; M242C guns. (JDW)