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With accelerating ducts, the duct profile is airfoil-like curved towards the inner side, which increases the inflow velocity and efficiency of the propeller. This effect works at lower speeds and is compensated increasingly at higher speeds by the added drag of the duct, which tends to decrease the efficiency of the propulsion.
A smooth-bore, cast-iron ship's cannon, from the Grand Turk, a replica of a mid-18th century three-masted frigate Replica of "Twin Sisters" smoothbores used in the Battle of San Jacinto (1836) USS Monitor (1862) with the muzzle of one of its two 11-inch smoothbore Dahlgren guns showing
The 2A29R "Ruta" or MT-12R is an MT-12 version with a radar system. From 1981, the gun could fire the laser beam-riding guided missile 9M117 Kastet (weapon system 9K116) and carried the new designator 2A29K "Kastet" or MT-12K. [5] By the mid-1990s, modern western tanks' frontal armor protection could no longer be penetrated by a 100 mm gun.
Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats , most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller , or less frequently, in pump-jets , an ...
Remote control from a secondary weapon control system Manual control by the joystick at the left of the gun (except the 100TR version) In manual mode, a team of two serve the turret: the gunner, at the left of the gun, uses a joystick to point the gun, and optic ranging and aiming instruments to direct the fire; the observer monitors the ...
BAE Systems Maritime – Naval Ships is a wholly owned subsidiary company of BAE Systems, specialising in naval surface shipbuilding and combat systems integration.One of three divisions of BAE Systems Maritime, along with BAE Systems Submarines and BAE Systems Maritime – Maritime Services, it is the largest shipbuilding company in the United Kingdom, one of the largest shipbuilders in ...
The D-10 is a high-velocity gun of 100 mm calibre (bore diameter), with a barrel length of 53.5 calibres. A muzzle velocity of 895 m/s gave it good anti-tank performance by late-war standards. A muzzle velocity of 895 m/s gave it good anti-tank performance by late-war standards.
Unprotected bore evacuators damaged by bullets have caused considerable problems in past conflicts, but up-armoring solved this problem. Bore evacuators are a common feature on most modern tanks and some self-propelled guns. The French Leclerc tank is a counterexample; it instead uses overpressure from an internal compartment to force gases ...