It is used primarily in ambushes and as an anti-infiltration device against enemy infantry. There are field-expedient methods of detonating the mine by tripwire, or by a timer, but these are rarely used. The team at Aerojet were given access to all previous research into directional mines, including the M18 and the Phoenix, as well as German research. The Picatinny criteria for the weapon were as follows: The requirement for kinetic energy was based on the fact that 58-foot pounds is required to deliver a potentially lethal injury. Schoolboy tosses it to him and Rambo rips off a piece of Sarah Miller's blouse. [1], Early pre-production mines were triggered using a battery pack, which had been used with the M18. The Claymore fires steel balls, out to about 100 m (110 yd) within a 60° arc in front of the device. Unlike a conventional land mine, the Claymore is command-detonated and directional, meaning it is fired by remote-control and shoots a pattern of metal balls into the kill zone like a shotgun. Schardin spent some time developing the discovery as a side-attack anti-tank weapon, but development was incomplete at the end of the war. It has the surface space of an average smartphone and includes a Picatinny rail for camera, laser, or other attachments. The second change was to use a poured plastic matrix to briefly contain the blast from the explosive, so that more of the blast energy was converted into projectile velocity. Italy produces the DAF M6 and DAF M7 directional fragmentation mines, weighing 18 and 10 kilograms respectively, with trip wire or remote control detonation. Secondly, the blast "leaked" between the balls, reducing their velocity. The M18A1 Claymore Mine is a type of mine that is filled with C-4 plastic explosive. [1], Minor modifications were made to the mine during its service. On both sides of the sight are fuse wells set at 45 degrees. It was used in Rambo to kill many Tatmadaw soldiers. The M18A1 Claymore Mine is a type of mine that is filled with C-4 plastic explosive. It was too large to be a practical infantry weapon and was relatively ineffective, with a maximum effective range of only 20 to 30 yards (about 20 to 30 meters).[1]. The steel balls are projected in a 60° fan-shaped pattern that is 6.5 feet (2.0 m) high and 50 m (55 yd) wide at a range of 50 m (55 yd). It was used in Rambo to kill many Tatmadaw soldiers. Its lethality out to 50 metres arrives in the form of 650 steel balls and it is activated by remote control or trip wire. Schardin spent some time developing the discovery as a side-attack anti-tankweapon, but development was inco… John Rambo plants the Claymore mine under the bomb. [1], By the spring of 1956, Aerojet had a near-final design. They are not reported as mines; however, the emplacing unit must ensure that the mines are removed, detonated, or turned over to a relieving unit. It comes with all the components of a real Claymore kit packed in an M7 bandolier. It is packed in a Claymore bag with inert M10 simulated detonator cap wire, an M57 "clacker" firing control, and an M40 circuit test kit. The cubes were embedded in five pounds of Composition B explosive. After a number of experiments, the engineers settled on Devcon-S steel-filled epoxy to hold the balls in place. [7] Given the requirements of weight and fragment density, approximately 700 fragments were needed, with the ability to aim the mine with an accuracy of around two feet (0.61 m) at the center of the target zone. When the mines are daisy-chained together, one firing device can detonate several mines. They adopted simple peep sights, which were later replaced by a knife blade sight. Bill Kincheloe came up with the idea of using a "Tiny Tim" toggle generator, of the type used with a number of Navy rockets. The M18 directional fragmentation anti-personnel mine, developed by Cardoen of Chile, contains 626 grams of explosives, surrounded by 607 AP fragmentation units providing a 60 degree arc of fire, with a 50-250 metre lethal range. An electrical blasting cap for triggering the mine was inserted through a small hole in the side. Two pairs of scissor legs attached to the bottom support the mine and allow it to be aimed vertically. With this change, the velocity improved to 3,995 feet (1,218 m) per second. The fragments can travel up to 250 m (270 yd). He places the piece of Sarah's shirt on it and covers the equipment with leaves before fleeing. The mine was planted in the ground, using its three sharp legs, and aimed in the direction of enemy approach; at that point, it was fitted with an electrical blasting cap. The M68 kit is designed to familiarize personnel with the placement and arming of a real M18 directional mine. A ferrite choke was added to prevent RF signals and lightning from triggering the mine.[1]. In total the mine weighed about 2.43-pound (1.10 kg), and could be fitted with an optional peep sight for aiming. This was determined experimentally by Bledsoe, through a large number of test firings. Rear-safety distance has been decreased to 15 m (49 ft) and shelf life has been increased to 25 years.[8]. [1] These fragments are moderately effective up to a range of 100 m (110 yd), with a hit probability of around 10% on a prone man-sized 1.3-square-foot (0.12 m2) target. The mine was triggered from a safe position, preferably to the side and rear. The Tatmadaw think that someone is hiding under the leaves and brush them away, pulling the trip wire in the process. The development of the M18A1 mine dates back to work done during World War II. The force of the explosion deforms the relatively soft steel balls into a shape similar to a .22 rimfire projectile. Take your favorite fandoms with you and never miss a beat. He worked with Don Kennedy and the two men submitted a 30-page proposal in response to Picatinny's RFP. They did not spall from the shock of the explosive, but deformed into a useful aerodynamic shape similar to a .22 rimfire projectile. When a sheet of explosive detonates in contact with a heavy backing surface (for example, a metal plate), the resulting blast is primarily directed away from the surface in a single direction. The M18A1 Claymore mine with the M57 firing device and M4 electric blasting cap assembly. When the M18A1 is detonated, the explosion drives the matrix forward, out of the mine at a velocity of 1,200 m/s (3,937 ft/s),[1] at the same time breaking it into individual fragments. Its inventor, Norman MacLeod, named the mine after a large medieval Scottish sword. At Aerojet in the early 1950s, Guy C. Throner had independently come up with a design for a Claymore-like mine. The Tatmadaw arrive and the dogs sniff out the piece of Sarah's shirt. Some inert mines were green with a light blue band. The M-MPIMS is designed to be more controllable than the Claymore with less collateral damage, using an insensitive munitions explosive that is poured rather than packed for more uniform distribution results in more consistent blast pattern. The shape was developed through experimentation to deliver the optimum distribution of fragments at 50 m (55 yd) range. [1], The original M18 mine fell far short of Picatinny's requirements. Schoolboy was seen carrying a Claymore during the film. Rambo spots an unexploded British "Grand Slam" bomb from World War II and asks Schoolboy for the Claymore. Using dyes to test various plastics for leaks, they found a suitable plastic called Durex 1661½, which could be easily molded into a case.