Experimental evaluation of artillery projectile impact errors induced by principal axis misalignment
Analytic studies and experiments have shown that the pressure of a small (less than 1 deg) principal axis misalignment in an artillery projectile produces a proportionately large initial total transient angle of attack. It was further predicted by 6-DOF trajectory simulations that this initial transient would cause significant projectile range degradation and drift perturbation. A flight test program was conducted to investigate these transient and trajectory perturbation effects; the resulting data are presented. Confirmation of the analytical predictions of these induced trajectory disturbances was obtained. These data provide a concrete basis for illustrating the undesirable effects on ballistic similitude that can result from small differences in the principal axis misalignment between otherwise similar projectiles.
- Research Organization:
- Sandia Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- EY-76-C-04-0789
- OSTI ID:
- 6555032
- Report Number(s):
- SAND-78-0417
- Country of Publication:
- United States
- Language:
- English
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