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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.
The Oerlikon 20 mm cannon is a series of autocannons based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II. Many versions of the cannon are still used. [2] [3]
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 ...
A side-view drawing of the GAU-8/A Avenger's mounting location in the A-10's forward fuselage GAU-8 with barrel shroud visible. Precision: 80% of rounds fired at 4,000 feet (1,200 m) range hit within a 40-foot (12 m) diameter circle. [a] Ammo: PGU-14/B API Armor Piercing Incendiary ; PGU-13/B HEI High explosive incendiary; PGU-15/B TP Target ...
Cannon recovered from the sea are often extensively damaged from exposure to salt water; electrolytic reduction treatment is required to forestall corrosion. [218] The cannon is then washed in deionized water to remove the electrolyte, and is treated in tannic acid, which prevents further rust and gives the metal a bluish-black colour.
US Patent drawing of the Hispano Suiza cannon. The British version was also licensed for use in the United States as the M1, with the United States Army Air Corps (USAAC) and U.S. Navy, which concluded that a single HS404 is analogous to three .50 machine guns in firepower while weighing less than twice as much, planning to switch to the 20 mm calibre as soon as the gun could be produced in ...
A carronade is a short, smoothbore, cast-iron cannon which was used by the Royal Navy.It was first produced by the Carron Company, an ironworks in Falkirk, Scotland, and was used from the last quarter of the 18th century to the mid-19th century.
Cannon operation is described by the 1771 Encyclopædia Britannica. Each cannon would be manned by two gunners, six soldiers, and four officers of the artillery. The right gunner was to prime the piece and load it with powder, while the left gunner would fetch the powder from the magazine and keep ready to fire the cannon at the officer's ...