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Orifice plate showing vena contracta. An orifice plate is a thin plate with a hole in it, which is usually placed in a pipe. When a fluid (whether liquid or gaseous) passes through the orifice, its pressure builds up slightly upstream of the orifice [1] but as the fluid is forced to converge to pass through the hole, the velocity increases and the fluid pressure decreases.
A part's-eye view of a boring bar. Hole types: Blind hole (left), through hole (middle), interrupted hole (right). In machining, boring is the process of enlarging a hole that has already been drilled (or cast) by means of a single-point cutting tool (or of a boring head containing several such tools), such as in boring a gun barrel or an engine cylinder.
The CIA asked the AEC to acquire the land, designated "Area 51" on the map, and to add it to the Nevada Test Site. [ 9 ] : 56–57 Johnson named the area "Paradise Ranch" to encourage workers to move to "the new facility in the middle of nowhere", as the CIA later described it, and the name became shortened to "the Ranch".
An orifice plate is a plate with a hole through it, placed perpendicular to the flow; it constricts the flow, and measuring the pressure differential across the constriction gives the flow rate. It is basically a crude form of Venturi meter, but with higher energy losses. There are three type of orifice: concentric, eccentric, and segmental. [7 ...
Sperry also was the creator of the Ball Turret Gun mounted under the Boeing B-17 Flying Fortress and the Consolidated B-24 Liberator. In 1944, Sperry sold the Brooklyn factory at 40 Flatbush Avenue Extension to the Howard clothing manufacturing company, which already had a smaller nearby factory.
When referring to cannons, the term gun is often used incorrectly. In military usage, a gun is a cannon with a high muzzle velocity and comparatively flat trajectory, [146] as opposed to other types of artillery, such as howitzers or mortars, which have lower muzzle velocities, and usually fire indirectly. [147] [148]
In the period before the Civil War, a U.S. Army light artillery battery was organized with four M1841 6-pounder field guns and two M1841 12-pounder howitzers. [1] The field gun fired solid iron cannon balls in a flat trajectory to smash its targets [2] while the howitzer was designed to lob hollow shells into massed formations or fortifications. [3]
The gun produced to this design after the close of hostilities of WW2, and was called the 5TG, [12] and shortly thereafter, the KAB. [14] It was the first Oerlikon gun design that differed radically from the original Becker design. [13] Shortly after the War, Oerlikon began development of another gas-operated autocannon, 204-Gk, presently KAA. [14]