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Cast bullets as cast (left), with gas check (center) and lubricated (right). A gas check is a gasket type component of firearms ammunition. Gas checks are used when non-jacketed bullets are used in high pressure cartridges. The use of a gas check inhibits the buildup of lead in the barrel and improves accuracy. [1]
Gas-checks [1] were attachments to ammunition that revolutionised the performance of RML heavy guns. [2] The first generation of RML heavy guns began entering service in about 1865. They all had Woolwich rifling [3] and relied on studs on the projectiles for rotation. Gas-checks were first introduced in 1878 or soon after.
A rotating gas-check (more commonly known as an automatic gas-check) was a copper plate that automatically attached itself to a specially-designed studless projectile of rifled muzzle-loading ("RML") artillery, sealing the escape of gas between the projectile and the barrel and imparting axial rotation to the projectile. [1]
A chart recorder which is part of a polygraph A circular chart recorder. A chart recorder is an electromechanical device that records an electrical or mechanical input trend onto a piece of paper (the chart). Chart recorders may record several inputs using different color pens and may record onto strip charts or circular charts.
A semiwadcutter (SWC) or flat-nose is a type of all-purpose bullet commonly used in revolvers.The SWC combines features of the traditional round-nosed bullets and the wadcutter bullets used in target shooting, and is used in both revolver and rifle cartridges for hunting, target shooting and plinking.
A leadscrew (or lead screw), also known as a power screw [1] or translation screw, [2] is a screw used as a linkage in a machine, to translate turning motion into linear motion. Because of the large area of sliding contact between their male and female members, screw threads have larger frictional energy losses compared to other linkages.
Cutting speed may be defined as the rate at the workpiece surface, irrespective of the machining operation used. A cutting speed for mild steel of 100 ft/min is the same whether it is the speed of the cutter passing over the workpiece, such as in a turning operation, or the speed of the cutter moving past a workpiece, such as in a milling operation.
1) The Lead Check Hook This variation of the check hook typically works best for orthodox vs. southpaw matchups, and it often leaves the opponent open to a follow-up uppercut as they try to chase. It is deemed highly effective against taller opponents with relatively longer reach as instead of pivoting off to the side, the boxer takes a step to ...