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Showing 1 to 20 of 187 for “"projectile"”.
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Projectile penetration of thin aluminium plate
… mainly with displacement time records of the projectile and target responses to impact. In the present study two new techniques have been developed to monitor: the penetration process. The first records a specific particle deceleration in the projectile during penetration from which the forces …
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Projectile impact damage in filament wound CFRP tubes : effect of stacking sequence on projectile kinetic energy dissipation
… sequence has on its ability to dissipate projectile kinetic energy has been investigated. T800 carbon fibre filament wound tubes in an epoxy matrix are investigated, having the following lay-up; laminate A - [-35°/35°/90°3/-35°/+35°/90°3/-35°/+35°] and laminate B - [90°6/(-35°/+35°)3]. The …
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Projectile thrust-drag optimization with external burning
External burning increases base pressure. The characteristic and linearized equations with heat addition are discuss ed, and the condition for maintaining irrotationa ity with heat addition is derived. A transition model, which extends the Crocco-Lees base flow model, and a spin model are …
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The exploration of concepts for projectile toys
… when used in low light conditions. Safety, projectile mass, and axially symmetric loading were the greatest issues of concern. The final suggested eDart incorporated a standard DC power connection with a simple mechanical switch. The eDarts reached comparable distances to the current foam …
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Recovering Lost Information From Avocational Projectile Point Collections
… the Great Basin identified 15 different projectile point types, with the densest concentration consisting of Elko Eared (20%) projectile points. The results of portable X-ray fluorescence (pXRF) analysis identified 62 obsidian sources from the northwest Great Basin, although it was …
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A 3-Dimensional Approach to Projectile Point Classification
… to create a simple and reliable technique of projectile point classification. It is also the author’s goal to use a classification system that monitors cultural transmission over time. This objective is addressed with an Archaic projectile point sequence from the Albertson site in Ozark region …
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X-band Doppler simulator for sport projectile radars
… velocity of objects in motion like aircraft or projectiles. A common solution to this problem is to perform a hardware- in-the-loop (HIL) simulation. This usually comprises of a device that does a real-time simulation of the environment or moving target. In the field of RF engineering, such a …
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Power requirements for a rapid-fire projectile toy concept
The toy industry holds a large portion of the American consumer market, and new products are in constant demand. A new mechanism for use in children's toys has been proposed to fire small plastic balls at a rate of over four hundred per minute. A portable, small, and safe power system must be …
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Wide area surveillance projectile deployment system design and modeling
… missions. The concept is to launch a projectile containing an unmanned aircraft to a desired location for surveillance. This Wide Area Surveillance Projectile or WASP was developed within the context of the MIT/Draper Technology Development Partnership Project, which aimed at the …
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System design and communication subsystem of an intelligent projectile
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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Numerical Investigation of Scaling Effects of a Ramjet-Powered Projectile
<p>Ramjet flowpath miniaturization is a potentially useful technology for integration into munitions to increase range, accuracy, and lethality. The emphasis of this effort is to numerically characterize the performance of a miniature hydrogen-fueled and ethylene-fueled ramjet flowpath during Mach …
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Numerical modeling of unsteady compressible gas flow around a projectile
… of compressible gas flow around a projectile during the motion of the projectile in the gun barrel is undertaken. The flow is considered axisymmetrical, nonstationary, nonisothermal, compressible, and turbulent. For calculating the compressible gas flow around a projectile, the …
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Alternative perspectives of projectile point variability during the Levantine Neolithic
… B community in southern Jordan, has an abundant projectile point assemblage that facilitates a thorough characterization and detailed techno-typological analysis of the projectile points recovered. It is concluded that current typologies tend to mask significant morphological aspects of the …
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Cavity and projectile dynamics in intermediate Froude number water entry
Introduction: Water entry of projectiles has long been a topics of interest in both sciences and engineering. It began with Worthington, who in the late XIX century found experimentally that a cavity is being formed when a steel sphere enters water (Worthington and Cole (1895-1896)). As we know …
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Design and development of a multi-shot foam projectile toy
… of a new toy for Hasbro®'s Nerfe line of foam projectile toys. Several years ago, Hasbro approached the MIT CADlab about developing a new method for firing Nerfe foam balls. The hope was that a new approach would be generated from which a new platform of products could be developed. The result …
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Design of repeating projectile toy based on bistable spring propulsion
… for the standard 1.75" foam balls used in Nerf® projectile toys. This technology was developed at M.I.T. by William Fienup and Barry Kudrowitz, who designed a single-shot hand-popper that utilized a large bistable spring. The goal of this research was to design and develop a projectile toy …
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A laboratory simulation of low velocity projectile impact on thin plates
… apparatus that will both accurately simulate a projectile impact event and provide an accurate means of analysing a material response to projectile impact events. A low velocity apparatus, based on the conventional instrumented drop tower apparatus, was designed and constructed. The apparatus is …
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A study of projectile motion on impact with thin aluminium plates
A new technique has been developed to examine projectile motion on impact with thin aluminium plates. A brief review of the field of penetration is given to show where the need for the present research arises. This is followed by an examination of alternative methods which could be used to …
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The effect of configurational asymmetries on projectile aerodynamics, stability, and performance
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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An analysis of the aerodynamics of a fiber optic mortar projectile
… on a full-scale model of a fiber optic mortar projectile. The desired model configurations were sting-mounted on the Stability Tunnel STO-1 strain gauge balance. The sting was mounted on a streamlined vertical pylon which provided remote rotation in both pitch and yaw while maintaining the …
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