Atmospheric Flight Dynamic Simulation Modeling Of Spin-Stabilized Projectiles And Small Bullets With Constant Aerodynamic Coefficients

Dimitrios N. Gkritzapis, EliasE. Panagiotopoulos, Dionissios P.Margarisb and Dimitrios G.Papanikas

Abstract: A full six degrees of freedom (6-DOF) simulation flight dynamics model is applied for the accurate prediction of short and long range trajectories of high and low spin-stabilized projectiles and small bullets via atmospheric flight to final impact point. The projectile is assumed to be both rigid (nonflexible) and rotationally symmetric about its spin axis launched at low and high pitch angles. The projectile maneuvering motion depends on the most significant forces and moments, in addition to wind, gravity and Magnus effects. The computational flight analysis is based on appropriate constant mean values of the aerodynamic projectile coefficients taken from an official tabulated database. The newer ICAO atmospheric model simulates the height distributions of density, pressure and temperature properties of the air. Static stability, also called gyroscopic stability, is examined as a necessary condition for stable flight motion in order to determine the sufficient initial spinning projectile rotation. The efficiency of the method developed gives satisfactory results compared with published data of verified experiments and computational codes on atmospheric dynamics model flight analysis.

Keywords: Trajectory dynamics simulation, constant aerodynamic analysis, high and low pitch angles, Magnus effects, symmetric projectiles, static stability criteria


Ref: JPyro, Issue 26, 2007, pp15-22
(J26_15)


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