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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 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.
The T-12 was designed by the construction bureau of the Yurga Machine-Building Plant as a replacement for the BS-3 100 mm gun. The first serial examples were produced in 1955, [2] but the T-12 entered service only in 1961. Its special feature was the use of a smoothbore gun.
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 ...
Entered service (estimated) in 1968. Essentially the same as the 3BM9 projectile with a tungsten carbide plug. [citation needed]Country of origin: Soviet Union; Projectile dimension: 410 mm 10: 1 L/d
The boxhole borer (or machine roger) is a variant of a raise borer that is used when there is not enough space on the higher of the two levels to be connected. The boxhole borer is set up on the lower level, drills a pilot hole as a guide, then drives the reamer bit along the pilot hole from the lower level to the upper.
The machine began excavation of the 1.7-mile-long (2.7 km) route on July 30, 2013, with completion of the bore scheduled in 14 months' time and the tunnel opening to traffic in December 2015. [ 24 ] [ 25 ] [ 26 ] Over 5,000 members of the public, along with Governor Jay Inslee , were present for the machine's dedication a week prior to the ...
In September 1954, out of many submitted plans, two main examples were chosen – the T95, and the T96, which used a larger and heavier gun with a 105 mm round. Both tanks used smooth-bore barrels with fixed mounts and no recoil systems. In November 1956, it was decided that nine tanks would be produced.