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The Liberator is a 3D-printable single-shot handgun, the first such printable firearm design made widely available online. [2] [3] [4] The open source firm Defense Distributed designed the gun and released the plans on the Internet on May 6, 2013.
The type 23 pillbox is rectangular in plan – essentially two squares, one of which is roofed and the other open – with embrasures in each of the available sides of the covered section. The embrasures are suitable for rifles or light machine guns. The open section was for a light anti-aircraft defence: a Bren or Lewis gun on a mounting.
The plan advocated Manukau Harbour as the best invasion point and landing heavy guns on Rangitoto Island to shell the forts on the North Shore. The plan was not very realistic and may have been an exercise to keep young officers busy (see United States war plans; which allocated the colour Garnet to New Zealand as part of War Plan Red). [74]
The plans of these committees were kept in secret War Books, although few remain. Detailed inventories of anything useful were kept: vehicles, animals and basic tools, and lists were made of contact details for key personnel. Plans were made for a wide range of emergencies, including improvised mortuaries and places to bury the dead. [130]
The casemate (or central battery) was an armored box that extended the full width of the ship protecting many guns. The armored sides of the box were the sides or hull of the ship. There was an armored bulkhead at the front and rear of the casemate, and a thick deck protecting the top.
A World War II hexagonal pillbox on the bank of the Mells River at Lullington, Somerset, England A British mini-pillbox in Jerusalem. A pillbox is a type of blockhouse, or concrete dug-in guard-post, often camouflaged, normally equipped with loopholes through which defenders can fire weapons.
Horse artillery—rows of limbers and caissons, each pulled by teams of six horses with three postilion riders and an escort on horseback (1933, Poland). A limber is a two-wheeled cart designed to support the trail of an artillery piece, or the stock of a field carriage such as a caisson or traveling forge, allowing it to be towed.
Box trail – A box trail is a type of field carriage that is rectangular in shape and consists of a ladder frame often with decking. The goal was strength and stability. Box trail carriages on howitzers often had an open area near the breech to permit the high angles of fire necessary for indirect fire. On larger guns, there often was a ramp ...