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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.
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 ...
Operation Upshot–Knothole was a series of eleven nuclear test shots conducted in 1953 at the Nevada Test Site.It followed Operation Ivy and preceded Operation Castle.. Over 21,000 soldiers took part in the ground exercise Desert Rock V in conjunction with the Upshot-Knothole Grable shot. [1]
Air-aspirating nozzles use an opening in the cone shaped nozzle to inject air into a stream of water based foam (CAFS/AFFF/FFFP) to make the concentrate "foam up". Most commonly found on foam extinguishers and foam handlines. Swirl nozzles inject the liquid in tangentially, and it spirals into the center and then exits through the central hole ...
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]
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]
Sometimes called the fuse hole or the touch hole. On the top of the vent on the outside of the cannon is a flat circular space called the vent field where the charge is lit. If the cannon is bronze, it will often have a vent piece made of copper screwed into the length of the vent.
The BFG ("Big Fucking Gun") [1] is a fictional weapon found in many video games, mostly in id Software-developed series' such as Doom and Quake. The abbreviation BFG stands for "Big Fucking Gun" as described in Tom Hall 's original Doom design document and in the user manual of Doom II: Hell on Earth .