Topic
Projectile
About: Projectile is a research topic. Over the lifetime, 13047 publications have been published within this topic receiving 115563 citations.
Papers published on a yearly basis
Papers
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20 Apr 1989
TL;DR: Aerodynamical air foil surface and subsurface expressions and/or impressions of varied geometrics, angles of attack, heights and depths, comprising part of a projectile surface itself to create McClain effect molecular friction/pressure/temperature reaction flight control surfaces which automatically achieve in all fluids and velocities of flight self-stablizing spin and rotation, increased height of trajectory with corresponding enhancement of range and distance, kinetic energies, inducing smooth laminar boundary layer flows, substantially decreasing drag effects, synergistically combined to constitute a major technological improvement in performance of
Abstract: Aerodynamical air foil surface and subsurface expressions and/or impressions of varied geometrics, angles of attack, heights and depths, comprising part of a projectile surface itself to create McClain effect molecular friction/pressure/temperature reaction flight control surfaces which automatically achieve in all fluids and velocities of flight self-stablizing spin and rotation, increased height of trajectory with corresponding enhancement of range and distance, kinetic energies, inducing smooth laminar boundary layer flows, substantially decreasing drag effects, synergistically combined to constitute a major technological improvement in performance of all projectiles.
36 citations
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12 Apr 1979TL;DR: In this paper, a double ramp configuration and a centrally poioned obturating band in alignment with the center of gravity of an in-bore projectile were used to improve the uniformity of the shear traction forces at the interface between the sabot segments and a sub-caliber projectile, to reduce propellant gas blow-by and to enhance projectile inbore and trajectory stability.
Abstract: A segmented sabot utilizes a double ramp configuration and a centrally poioned obturating band in alignment with the center of gravity of an in-bore projectile to improve the uniformity of the shear traction forces at the interface between the sabot segments and a subcaliber projectile, to reduce propellant gas blow-by and to enhance projectile in-bore and trajectory stability. The increased uniformity of shear traction forces between sabot and projectile interfaces and propellant gas self-sealing design permits a reduction in sabot weight of sufficient magnitude to increase the velocity of the projectile at the muzzle exit.
36 citations
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19 Jun 1969TL;DR: Ammunition disclosure in which a generally teardrop shaped hollow projectile is formed of frangible plastic or other suitable material, the rear end of the projectile is finned and the forward rounded or ogive shaped end is scored or grooved for ease of rupture on impact, the projectile carries a desired flowable material such as a liquid, powder, or a gas, and preferably a liquid for dispersion on impact at target as discussed by the authors.
Abstract: Ammunition is disclosed in which a generally teardrop shaped hollow projectile is formed of frangible plastic or other suitable material, the rear end of the projectile is finned and the forward rounded or ogive shaped end is scored or grooved for ease of rupture on impact, the projectile carries a payload of a desired flowable material such as a liquid, powder, or a gas, and preferably a liquid, for dispersion on impact at target, the projectile is carried in a cartridge case in which ignitable propellant powder is disposed adjacent the rear end of the projectile and adjacent a primer, there being a blanket of soft resilient flexible polyurethane foam surrounding and behind the rear finned area of the projectile and disposed between the fins and the propellant powder to retain the powder in place in a compact zone adjacent the finned rear of the projectile.
36 citations
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TL;DR: In this article, the surface potential of He atoms colliding with a LiF(001) surface along axial crystallographic channels is obtained from an accurate density-functional theory calculation, which includes polarization effects and surface relaxation.
Abstract: Diffraction patterns produced by grazing scattering of fast atoms from insulator surfaces are used to examine the atom-surface interaction. The method is applied to He atoms colliding with a LiF(001) surface along axial crystallographic channels. The projectile-surface potential is obtained from an accurate density-functional theory calculation, which includes polarization effects and surface relaxation. For the description of the collision process we employ the surface eikonal approximation, which takes into account quantum interference between different projectile paths. The dependence of projectile spectra on the parallel and perpendicular incident energies is experimentally and theoretically analyzed, demonstrating the range of applicability of the proposed model.
36 citations
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TL;DR: In this article, an engineering model on mass abrasion of kinetic energy penetrator is presented to predict the nose shape and mass loss of the residual projectile after high-speed penetration into concrete.
Abstract: An engineering model on mass abrasion of kinetic energy penetrator is presented to predict the nose shape and mass loss of the residual projectile after high-speed penetration into concrete. The experimental analysis indicates that the kinetic energy of penetrator (i.e., mass and velocity of projectile) and the hardness of aggregate of concrete significantly affect the mass abrasion of projectile. A theoretical upper limit exists for the mass loss. More general relationship between mass loss and impact function I of projectile is constructed. Graphical discussion declares that the most mass loss occurs on the nose of the projectile and the eroding nose approaches to an ogival shape with a smaller value of caliber-radius-head (CRH). A relative rate of mass abrasion on ogive-nose is further defined and analyzed. The mass loss from abrasion on kinetic energy (KE) penetrator may be evaluated through the variation of nose shape.
35 citations