摘要:
A lightweight mortar tube is presented herein having at least three layers: (1) a first inner bore facing layer comprised of a metal having a melting point greater than 800° C.; (2) a second thermal barrier layer comprised of a ceramic material attached to the first layer, and (3) a third outer shell layer attached to the second layer comprising of fiber reinforced composite material where the composite material is either a polymer, metal or ceramic. All of the layers are cohesively integrated with each other into a seamless wall. The improved multi-layered mortar tube described herein is lighter, yet maintains the same performance standards as comparable steel-based mortar tubes.
摘要:
An improved light gas gun launches a projectile in a light gas atmosphere as it travels through a frictionless barrel to achieve high muzzle velocities, decreased acoustic signatures, and increased ranges. The light gas atmosphere is introduced by a purge valve prior to firing or by a muzzle valve that holds a positive light gas pressure on the barrel and breech. The muzzle valve also routes the majority of propellant gases through a suppression canister, reducing the light gas gun's acoustic signature. The frictionless barrel uses light gas propellant routed through gas bearings to keep the projectile centered in the barrel and preclude the projectile from contacting the barrel walls, eliminating barrel wear.
摘要:
A rifle barrel having a sound suppressor and a rifle comprising such a barrel. Material disposed over the rifle barrel and extending longitudinally and distally from a proximal end of the rifle barrel defines a housing, The housing surrounds at least a majority of the sound suppressing element, which is connected to the rifle barrel solely by containment within the housing. The sound suppressing comprises an acoustic labyrinth formed by a plurality of components disposed together along a longitudinal plane coextensive with an axis of the rifle barrel.
摘要:
A composite projectile barrel having an inner barrel section and a composite outer barrel shell aligned coaxially with the inner barrel section is described. The inner barrel section may be made from a metal or metal alloy. The composite outer barrel shell may include two or more layers of carbon fiber prepreg and a layer of non-woven nanofiber web membrane disposed between adjacent layer of carbon fiber prepreg. The carbon fiber prepreg can include a weave of carbon fibers in a nanoparticle-reinforced resin matrix, with the resin content being less than or equal to 35 wt % of the carbon fiber content. The non-woven nanofiber web membrane can be Xantu.layr™.
摘要:
The current invention teaches a process to add transition metals to a substrate with careful, spacial control to build up regions selectively, and a machine to enable this process to be performed. The process is amenable to doping with other gases to provide dispersion strengthening and/or to form metal matrix composites. In addition, the process is capable of forming laminar or topologically layered materials. In the present invention, a heated nozzle with a variable orifice projects carbonyl gas or gases at the appropriate temperature to precise locations on a surface. The coordinates on the substrate over which the nozzle is located can be computer controlled. Furthermore, the orifice of the nozzle and the flow rate are controlled to widen or narrow the area of deposition. The substrate can be heated to a temperature where transition metal carbonyl deposition is optimal or near optimal, or heated below the optimal region such that the heated carbonyl gas from the nozzle leads to rapid deposition in the desired localized region. The structure can be built up into complex shapes as desired.
摘要:
A method of forming a gun barrel includes providing a gun barrel with a desired wall thickness, and cold gas-dynamic spraying the gun barrel with a titanium powder to form an outer layer. The method may further include contouring the outer layer, applying a ceramic top coating to the contoured outer layer of the gun barrel, and sealing the gun barrel with a liquid metal sealer. The method may further include spraying the gun barrel with a bonding coating to form a bonding layer before cold gas-dynamic spraying the gun barrel.
摘要:
A crossbow may include a crossbow barrel having reduced weight and increased strength and shock resistance to the crossbow. This invention may also aid in improving torsional resistance, improving specific stiffness, and increasing compresses strength. The invention may also reduce friction between a barrel and a bow string to increase bow string life. The invention may also reduce the friction between a barrel and a bow to allow added arrow distance. Additionally, the crossbow may decrease both vibration and sound.
摘要:
An unmanned aerial vehicle (UAV) launch tube that comprises a tethered sabot configured to engage a UAV within a launcher volume defined by an inner wall, the tethered sabot dimensioned to provide a pressure seal at the inner wall and tethered to the inner wall, and wherein the tethered sabot is hollow having an open end oriented toward a high pressure volume and a tether attached within a hollow of the sabot and attached to the inner wall retaining the high pressure volume or attach to the inner base wall. A system comprising a communication node and a launcher comprising an unmanned aerial vehicle (UAV) in a pre-launch state configured to receive and respond to command inputs from the communication node.
摘要:
A method of forming a gun barrel includes machining a gun barrel to a desired wall thickness, spraying the gun barrel with a bonding coating to form a bonding layer, cold gas-dynamic spraying the gun barrel with a titanium powder to form an outer layer, contouring the outer layer, applying a ceramic top coating to the contoured outer layer of the gun barrel, sealing the gun barrel with a liquid metal sealer. Another method of manufacturing a gun barrel includes preparing a mandrel sized substantially equal to a bore of a gun barrel, spraying the mandrel with a first coating, spraying the mandrel with a second amorphous metal coating, cold gas-dynamic spraying the mandrel with a third titanium powder coating, removing the mandrel, and sealing the third coating with a liquid metal sealer.
摘要:
A rifle barrel having a sound suppressor and a rifle comprising such a barrel. Material disposed over the rifle barrel and extending longitudinally and distally from a proximal end of the rifle barrel defines a housing. The housing surrounds at least a majority of the sound suppressing element, which is connected to the rifle barrel solely by containment within the housing. The sound suppressing comprises an acoustic labyrinth formed by a plurality of components disposed together along a longitudinal plane coextensive with an axis of the rifle barrel.