Simply stated, the analytical procedure utilized in BALANS presupposes that the projectile is initially misaligned within the gun tube due to manufacturing tolerances. During firing, this misalignment produces secondary forces causing transverse displacement and yaw motion of the projectile as it travels from breech to muzzle. The resulting yaw angle, angular rate, and transverse velocity at muzzle exit are then analyzed for their effect on dispersion. Additionally, the structural adequacy of a model may be evaluated. The following figure shows how BALANS fits into an overall projectile analysis scheme.

Briefly summarized, BALANS may be used in either of two modes: Each of these two analysis flows is discussed below.

1. User defined initial projectile orientation, point solution (single analysis) with detailed structural/dynamic response output
2. Monte-Carlo (randomly selected) initial projectile orientation, multiple run analyses with summary dispersion evaluation.

It should be noted here that, when pursuing the Monte-Carlo analysis option, the initial steps are the same as when pursuing the point solution analysis.

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