By Terrance McGovern, Bolling Smith, Peter Bull
American Coastal Defences 1885-1950 КНИГИ ;ВОЕННАЯ ИСТОРИЯ American Coastal Defences 1885-1950 (Fortress forty four) ByTerrance McGovernPublisher:Os Publishing2006 64PagesISBN: 1841769223PDF19 MBA new around of fortification construction started within the usa and its in a foreign country territories within the late-19th century, which benefited from the most recent expertise and the rise in America's around the globe fiscal stature. This publication offers a concise advent to the layout, improvement and goal of yank coastal defenses within the 'modern interval' (1885-1950), a interval outlined by way of concrete, metal, and robust breech-loading rifles. filled with interval and modern day photographs of the fortifications, and written via a number one specialist, it covers the emplacements, weaponry, gear, and folks that defended their state in instances of significant switch and uncertainty.sharingmatrixletitbit zero
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Extra info for American Coastal Defences 1885-1950
Mortars differed somewhat from this pattern. Most importantly, they used zone powder charges, a series of incremental charges that increased the range in steps, while the elevation was varied between 4S and 6S degrees to produce a specific range. Some mortar projectiles, while generally similar to those for the guns, had different names, such as deck-piercing and torpedo shell (HE). Mortars also had different driving bands (copper gas seals), due to their lower muzzle velocity. The nominal weight of a 12in.
The resulting battery design resembled the last generation of 14in. batteries, begun the same year to defend the new port at Los Angeles. The primary difference was the substitution of barbette carriages for disappearing ones. The new batteries, first begun in 1916, were largely constructed within the next five years. The carriages, necessarily emplaced in large, round, open emplacements, had no real parapet to protect men or guns. The central traverse magazine, a concrete structure covered with earth, contained the ammunition, a small power plant, and two plotting rooms, so each gun could track separate targets and send firing data to the guns by long rods through tunnels to a mechanical range indicator within view of the gun crew.
Railway gUlls to Canada for Esquimalt and Prince Rupert. Both Australia and New Zealand received IS5mm guns, but offers of weapons to most other allies outside the Caribbean were either declined or thwarted by rapid Axis advances. Seacoast ammunition All the effort to build seacoast guns and erect batteries was wasted without reliable and effective ammunition. Seacoast artillery ammunition was composed of four basic elements. A primer at the base of the charge ignited the propellant in the gun.