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20-582: SADM may refer to: Special Atomic Demolition Munition Morón Airport and Air Base , ICAO code: SADM Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title SADM . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=SADM&oldid=1125518073 " Category : Disambiguation pages Hidden categories: Short description

40-410: A barrier 50 feet (15 m) long and each coil could be held in place with just three staples hammered into the ground. Dannert wire was imported into Britain from Germany before World War II. During the invasion crisis of 1940–1941 , the demand for Dannert wire was so great that some was produced with low manganese steel wire which was easier to cut. This material was known as "Yellow Dannert" after

60-715: A barrier would resemble a fence as might be used for agricultural purposes. The double apron fence comprised a line of pickets with wires running diagonally down to points on the ground either side of the fence. Horizontal wires were attached to these diagonals. More elaborate and formidable obstructions could be formed with multiple lines of stakes connected with wire running from side-to-side, back-to-front, and diagonally in many directions. Effective as these obstacles were, their construction took considerable time. Barbed wire obstacles were vulnerable to being pushed about by artillery shells; in World War I, this frequently resulted in

80-583: A concertina craze on: innumerable coils of barbed wire were converted into concertinas by the simple process of winding them round and round seven upright stakes in the ground; every new lap of wire was fastened to the one below it at every other stake by a twist of plain wire; the result, when you came to the end of a coil and lifted the whole up off the stakes was heavy ring of barbed wire that concertina'd out into ten-yard lengths. Concertina wire packs flat for ease of transport and can then be deployed as an obstacle much more quickly than ordinary barbed wire, since

100-500: A corruption/misunderstanding of concertina and led to confusion with the Roman Emperor Constantine . This, in turn, has led to some people trying to differentiate between concertina wire and constantine wire by assigning the term constantine wire to what is commonly known as razor wire . In contrast to the helical construction of concertina wire, razor wire, or less commonly, constantine wire , consists of

120-427: A kilometre ( 5 ⁄ 8 mile) per hour. Such an obstacle is not very effective by itself (although it will still hinder an enemy advance under the guns of the defenders), and concertinas are normally built up into more elaborate patterns as time permits. Today, concertina wire is factory made and is available in forms that can be deployed very rapidly from the back of a vehicle or trailer. Oil-tempered barbed wire

140-401: A mass of randomly entangled wires that could be even more daunting than a carefully constructed obstacle. Learning this lesson, World War I soldiers would deploy barbed wire in so-called concertinas that were relatively loose. Barbed wire concertinas could be prepared in the trenches and then deployed in no-man's-land relatively quickly under cover of darkness. There was what might be called

160-412: Is also used in non-military settings, such as when used in prison barriers , detention camps , riot control , or at international borders. During World War I , soldiers manufactured concertina wire themselves, using ordinary barbed wire. Today, it is factory made. In World War I, barbed wire obstacles were made by stretching lengths of barbed wire between stakes of wood or iron. At its simplest, such

180-575: Is different from Wikidata All article disambiguation pages All disambiguation pages Special Atomic Demolition Munition At the time of the weapon's development, the existing Atomic Demolition Munition (ADM) was the T-4 Atomic Demolition Munition . Its transport required 4 men, each carrying a 40-pound (18 kg) section of the weapon. Development began in June 1960 and an interim Mark 54 Mod 0 (now called

200-672: The B54-0 ) weapon was put into production in April 1963. Production of the B54 Mod 1 SADM began in August 1964. The weapon was 12 inches (305 mm) in diameter, 18 inches (457 mm) long, and weighed 58.5 pounds (26.5 kg). It included the warhead, a fuzing and firing system with a mechanical timer, a ferroelectric firing set, and a sealed housing. The body was constructed with aluminum forgings and molded fiberglass, and foam-rubber insulation

220-464: The SADM. The report stated that he and other soldiers training for the program knew this was a suicide mission because either it would be unrealistic to outrun the timer on the bomb, or soldiers would be obligated to secure the site before the timer went off. However, employment manuals specifically describe the firing party and their guard retreating from the emplacement site, at which point security of

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240-460: The desirable properties of a random entanglement. A triple concertina fence could be deployed very quickly: it is possible for a party of five men to deploy 50 yards (46 m) of triple concertina fence in just 15 minutes. Optionally, triple concertina fence could be strengthened with uprights, but this increases the construction time significantly. Concertina wire is sometimes mistakenly called "constantine" wire . Constantine probably came from

260-416: The device is provided through a combination of passive security measures, including concealment, camouflage, and the use of decoys, as well as active security measures including booby traps, obstacles (such as concertina wire and landmines), and long-range artillery fire. Further, the SADM included a Field Wire Remote Control System (FWRCS), a device that enabled the sending of safe/arm and firing signals to

280-400: The flattened coil of wire can easily be stretched out, forming an instant obstacle that will at least slow enemy passage. Several such coils with a few stakes to secure them in place are just as effective as an ordinary barbed wire fence, which must be built by driving stakes and running multiple wires between them. A platoon of soldiers can deploy a single concertina fence at a rate of about

300-411: The identifying yellow paint on the concertina handles. To compensate for the reduced effectiveness of Yellow Dannert, an extra supply of pickets were issued in lieu of screw pickets . A barrier known as a triple concertina wire fence consists of two parallel concertinas joined by twists of wire and topped by a third concertina similarly attached. The result is an extremely effective barrier with many of

320-601: The selection of the correct yield for each particular target. These tables accounted for various employment particulars such as depth of burial, fallout considerations, and minimum safe separation distances between adjacent weapons and personnel. On December 27, 2018, the Green Bay Press-Gazette interviewed veteran Mark Bentley, who had trained for the Special Atomic Demolition Munition program to manually place and detonate

340-537: The use of ADMs tactically in both offensive and defensive operations. In offensive operations, ADMs are described as being useful for improving flank and rear security of a unit, impeding counterattacks and assisting in enemy entrapment. ADM employment manuals describe the use of ADMs defensively for combat engineering purposes. Possible targets described include bridges, dams, canals, tunnels, airfields, railroad marshaling yards, ports and industrial plants, and power facilities. Extensive tables were provided to enable

360-401: The weapon via a wire for safe remote detonation of the weapon. Concertina wire Concertina wire or Dannert wire is a type of barbed wire or razor wire that is formed in large coils which can be expanded like a concertina . In conjunction with plain barbed wire (and/or razor wire/tape ) and steel pickets , it is most often used to form military-style wire obstacles . It

380-422: Was developed during World War I; it was much harder to cut than ordinary barbed wire. During the 1930s, German Horst Dannert developed concertina wire of this high-grade steel wire. The result was entirely self-supporting; it did not require any vertical posts. An individual Dannert wire concertina could be compressed into a compact coil that could be carried by one man and then stretched out along its axis to make

400-456: Was used between the warhead and case. Dials were illuminated with tritium-phosphor paint for easy night-reading. A housing for underwater emplacement was provided that included external controls. The B54 Mod 2 started production in June 1965. The weapon was the same size as previous mods but now weighed more – 70 pounds (32 kg). The yield was estimated to be 10 to 1,000 tons of TNT (42 to 4,184 GJ). ADM employment manuals describe

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