Topic
Projectile
About: Projectile is a research topic. Over the lifetime, 13047 publications have been published within this topic receiving 115563 citations.
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Patent•
21 Mar 2001
TL;DR: In this article, a toy projectile launcher that launches projectiles is described, which includes a housing having an entrance and an exit in communication therewith to define a channel, a pair of flywheels supported by the housing and positioned about and in communication with the channel.
Abstract: This invention is a toy projectile launcher that launches projectiles. The launcher includes a housing having an entrance and an exit in communication therewith to define a channel, a pair of flywheels supported by the housing and positioned about and in communication with the channel, and a pump handle for rotating the flywheels such that a projectile entering the channel may be engaged by the rotating flywheels and impelled through the channel and out through the exit.
46 citations
01 Oct 2008
TL;DR: In this article, a series of transient non-linear dynamic finite element method (FEM) analyses pertaining to the interaction of a single-ply plain-woven balanced square textile-fabric armour with a spherical steel projectile is carried out in order to compare the corresponding results obtained for two different yarn models.
Abstract: A series of transient non-linear dynamic finite-element method (FEM) analyses pertaining to the interaction of a single-ply plain-woven balanced square textile-fabric armour with a spherical steel projectile is carried out in order to compare the corresponding results obtained for two different yarn models: (a) a solid FEM model in which the warp and weft yarns are represented using first-order three-dimensional solid elements and (b) a membrane model in which the same yarns are represented using second-order membrane elements. The analyses are carried out under different yarn—yarn and projectile—fabric frictional conditions and under different far-field boundary conditions applied to the edges of the fabric. The results obtained showed that the two sets of analyses yield comparable predictions regarding the temporal evolution and the spatial distribution of the deformation and damage fields within the fabric, regarding the ability of the fabric to absorb the projectile's kinetic energy and regarding the ...
46 citations
Patent•
14 Nov 1986
TL;DR: In this paper, a high pressure mixture of low molecular weight constituents of the fluid is injected into the bore to accelerate the propelling fluid, and the mixture is dragged into the plasma during mixing to form a boundary layer between the plasma and the barrel walls.
Abstract: A projectile is accelerated in a barrel bore by applying a plasma jet to a projectile propelling fluid. The plasma jet is derived from a structure forming a capillary passage having a wall formed by a low molecular weight, dielectric powdery filler or water in many rigid containers, shaped as spheres or straw-like tubes having axes parallel to the passage longitudinal axis. The fluid and jet interact so the fluid is heated by the jet, whereby low atomic weight constituents of the fluid are sufficiently heated to become mixed with the plasma to form a high pressure mixture that is injected into the bore to accelerate the projectile. The fluid is dragged into the plasma during mixing to cool the plasma and form a boundary layer between the plasma and the barrel walls so that the mixture does not cause substantial damage to the walls of the bore. The plasma is energized by applying voltage from an electric pulse source to electrodes at opposite ends of the passage. The pulse has a wave shape and duration for initially igniting the plasma source and for thereafter applying energy to the ignited plasma to control the pressure of the mixture. Initially, the fluid cools the plasma without the mixture developing sufficient pressure to accelerate the projectile appreciably. The wave shape and duration are such that the pressure applied to the projectile remains substantially constant while the projectile is being accelerated through the barrel, as occurs during about one-half of the projectile travel time in the barrel.
46 citations
TL;DR: In this article, an elasto-plastic model, capable of accounting for strain-hardening effects, material rate-dependence, as well as the relevant damage criteria, was employed to predict the dynamic response of the targets.
46 citations
Patent•
12 Feb 1996
TL;DR: In this article, a nearly lead free steel alloy containing tellurium was used to make a steel bullet with a grooved guide section that is permitted to be deformed by the rifle bore without destroying the bore when the projectile is fired in a rifle.
Abstract: The projectile is made of a virtually lead free steel alloy containing tellurium. This projectile is more environmentally safe compared to conventional lead bullets. The tellurium in combination with a small amount of lead provides a steel alloy having a high machinability and good lubrication properties, thus reducing frictional wear inside a rifle bore when the bullet is passed therethrough. Additionally, a thin anticorrosive coating may be applied on the bullet. The coating may comprise a metal selected from the group consisting of copper, zinc and nickel. An additional lubricating coating comprising polytetrafluoroethylene may also be applied on the projectile. The projectile has a grooved guide section that is permitted to be deformed by the rifle bore without destroying the rifle bore when the projectile is fired in a rifle.
46 citations