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Recoil Arresting and Recoilless Guns
Published in Donald E. Carlucci, Sidney S. Jacobson, Ballistics, 2018
Donald E. Carlucci, Sidney S. Jacobson
A second way around the recoil mass challenge is to eliminate the recoil. For a brief period following World War I, this was done by ganging two cannons together that shared a common chamber. One cannon would fire the projectile at the intended target. The other cannon sharing a common centerline would fire a countermass projectile in the opposite direction. This is known as a Davis gun in tribute to its inventor, Commander Cleland Davis [3]. The guns were mounted to slow-moving flying boat aircraft and were manned by external gunners in the free airstream at the nose of the aircraft. They could manually point the cannon and fire over the bow of the flying boat at submarines below. Although it is successful at eliminating recoil, the Davis gun is cumbersome to reload, the two cannons are rather heavy, and the firing of two projectiles leads to heavy ammunition.
Design and Mounting of Windows, Domes, and Filters
Published in Paul Yoder, Daniel Vukobratovich, Opto-Mechanical Systems Design, 2017
Harris (1999) discusses another interesting application involving a pressure differential across a dome. This is the case of a dome-protected IR sensor at the front of a cannon- or mortar-launched projectile. Accelerations involved are extremely high. The resulting pressure PA in MPa is given by the following equation: () PA=ρ⋅tW⋅aG
Explosives and blasting
Published in Ratan Raj Tatiya, Surface and Underground Excavations, 2013
Atlas Copco2 has developed a unit, CRAC-200, with a hydraulic cannon that shoots a water projectile into drilled holes, as shown in figure 5.12(d). The high water pressure created in the hole splits the rock. The unit consists of a rock drill, a water cannon and a feed mechanism. This set can be fixed on the floor or put on a mobile van. The splitting operation consists of drilling a hole of 34-36 mm dia. of 0.8 m depth. The cannon is swung into position over the drilled hole and then it is charged with 1.8 lit. water. The cannon forces the water projectile into the hole causing the boulder to split.
The transfer and exploitation of German air-to-air rocket and guided missile technology by the Western Allies after World War II
Published in The International Journal for the History of Engineering & Technology, 2020
No air-to-air guided missiles or rockets entered service with the air forces and naval aviation branches of the Western Allies during World War II. The UK was the first of the three powers to enter into the air-to-air rocket field, although abortively. In July 1940, the month the Battle of Britain commenced, the Air Ministry considered the possibility of using rockets fitted to fighter aircraft to break up large formations of Luftwaffe bombers. The intended plan was to fit tubes 10 feet long and 12 inches in diameter in the cannon bay (where there were four 20 mm cannons) of the Bristol 156 Beaufighter, to fire 3-inch (76 mm) calibre unrotated projectile (UP) solid propellant anti-aircraft rockets. In tests, two rockets were successfully fired from such a tube, but the investigation did not proceed any further. Aircraft rocket development in Britain was subsequently continued by the Ministry of Aircraft Production (MAP). For the remainder of the war, the UK led the Allies in the development of solid propellant aircraft rockets for use in air-to-surface, anti-tank, anti-ship and anti-submarine roles, with demonstrable success. These projectiles evolved from the 3-inch rocket to the higher-velocity 5-inch (127 mm) calibre light alloy/plastic (LAP) rocket (designed for assisted take-off), to the armour-busting 10.25-inch (260.35 mm) calibre ‘Uncle Tom’ anti-shipping rocket.14
Inspired by British inventions: Joseph von Baader (1763–1835) — a Bavarian engineer fighting a losing battle
Published in The International Journal for the History of Engineering & Technology, 2020
The young smith was the 19-years old Georg von Reichenbach, the son of a master cannon-borer and artillery lieutenant in Mannheim. Young Reichenbach was educated at a Mannheim military school and, according to an official document from May 1791, sent with a grant from the Mannheim military budget to England ‘in order to bring his mechanical art to perfection’.17 From the available archival material it is not clear whether the order of a steam engine was merely a pretense for industrial espionage. Boulton seems to have entertained suspicion from the very beginning in view of earlier experience with foreign visitors.18 When Baader and Reichenbach arrived at Soho, they were coldly received, as Reichenbach recorded in his diary on July 10th, 1791: