An Implicit Side-Firing Gunship Fire Control System.

摘要

The problem of operating a side-firing gunship in a closed orbit about a target in the presence of wind is investigated. The orbit is determined to be elliptical with the target at one of the foci. Orbit stability is defined and two families of stable orbits for various ratios of wind speed to airspeed are calculated from the criterion for stability. The ballistic equations for side-firing guns (drag-dominated trajectory with gravitational perturbation) are solved analytically to determine ballistic drop. Ballistic-orbit matching is accomplished to determine the criterion for matching muzzle velocity and projectile ballistic coefficient to a stable orbit specified in terms of absolute altitude and aircraft airspeed. (Author)