MARAUDER (Magnetically Accelerated Ring to Achieve Ultra-high Directed Energy and Radiation) is, or was, a United States Air Force Research Laboratory project concerning the development of a coaxial plasma railgun. In some hypervelocity research projects, projectiles are 'pre-injected' into railguns, to avoid the need for a standing start, and both two-stage light-gas guns and conventional powder guns have been used for this role. [119][64] Electromagnetic guns and directed energy weapons are among the systems which Indian Navy aims to acquire in its modernisation plan upto 2030.[120]. Electrodynamic assistance to launch rockets has been studied. ′ {\displaystyle r} − s {\displaystyle F} t [62][63], India has successfully tested their own railgun. The work was conducted predominantly at the Aberdeen Proving Ground, and much of the early research drew inspiration from the railgun experiments performed by the Australian National University. Note that By Combining the inital explosion of standard ballistic shotgun together with the propulsion of a handheld railgun the EX-77 is capable of neutralizing targets from thrice the distance of standard shotgun. [11][14], In 1944, during World War II, Joachim Hänsler of Nazi Germany's Ordnance Office proposed the first theoretically viable railgun. 2 [44] Space applications of this technology would likely involve specially formed electromagnetic coils and superconducting magnets. There are two main types or setups of a coilgun: single-stage and multistage. The Railgun is a high-tech military prototype Railgun designed for infantry use, adopting a carbine-like appearance. Projectiles are also typically much cheaper and smaller, allowing for many more to be carried (they have no guidance systems, and rely on the railgun to supply their kinetic energy, rather than providing it themselves). [106], The U.S. Army Research Laboratory also monitored electromagnetic and electrothermal gun technology development at the Institute for Advanced Technology (IAT) at the University of Texas at Austin, one of five university and industry laboratories that ARL federated to procure technical support. Under high-use conditions, current railguns would require frequent replacement of the rails, or to use a heat-resistant material that would be conductive enough to produce the same effect. Proton is estimated at $5000/kg as of 2015. [38][83], A test took place in February 2012, at the Naval Surface Warfare Center Dahlgren Division. [114], In early February 2018, pictures of what is claimed to be a Chinese railgun were published online. This is the SR-1, and it’s the first semi-automatic portable railgun ever built. [23] While military research into railgun technology in the United States ensued continuously in the following decades, the direction and focus that it took shifted dramatically with major changes in funding levels and the needs of different government agencies. is the perpendicular distance from the point on the armature to the axis of one of the wires. On June 22, 2015, General Atomics’ Electromagnetic Systems announced that projectiles with on-board electronics survived the whole railgun launch environment and performed their intended functions in four consecutive tests on June 9 and 10 June at the U.S. Army's Dugway Proving Ground in Utah. Hand held RAILGUN: I want this because of... Reasons. With most practical railgun geometries, it is not easy to produce an electromagnetic expression for the railgun force that is both simple and reasonably accurate. Probably the oldest consistently successful system was built by the UK's Defence Research Agency at Dundrennan Range in Kirkcudbright, Scotland. d Since the lumped circuit model describes the railgun force in terms of fairly normal circuit equations, it becomes possible to specify a simple time domain model of a railgun. , so these quantities are modelled as, where In 2015 when the weapon system gained the ability to strike over extended ranges with increased lethality. Portable 1.25kJ Coilgun The “CG-33” 1.25kJ Coilgun is a single stage, bolt action coilgun. d Why, he makes it three times as powerful, shrinks it by half, and adds a semi-automatic firing mechanism, of course! [29][30], In 2010, the United States Navy tested a BAE Systems-designed compact-sized railgun for ship emplacement that accelerated a 3.2 kg (7 pound) projectile to hypersonic velocities of approximately 3,390 m/s (7,600 mph; 12,200 km/h; 11,100 ft/s), or about Mach 10, with 18.4 MJ of kinetic energy. Most recently, Mike served as Tech Editor at The Daily Dot, and has been featured in USA Today, Time.com, and countless other web and print outlets. Navy. B The projectile is energized continuously by two brushes sliding along the rails, and two or more additional brushes on the projectile serve to energize and commute several windings of the helical barrel direction in front of and/or behind the projectile. One shot would require 6 million amps of current, so it will take a long time to develop capacitors that can generate enough energy and strong enough gun materials.[75]. {\displaystyle I} A railgun requires a pulsed DC power supply. However, the Zumwalt has been cancelled and no further units will be built. Payload per launch in these conditions is over 400 kg. ). The United States military have expressed interest in pursuing research in electric gun technology throughout the late 20th century due to how electromagnetic guns don't require propellants to fire a shot like conventional gun systems, significantly increasing crew safety and reducing logistics costs, as well as provide a greater range. [25] The facility became the Army's first Federally Funded Research and Development Center and housed a few of the Army's electromagnetic launchers, such as the Medium Caliber Launcher. [64] Russia,[65] China,[66][67] and Turkey's defence company ASELSAN [68] are also developing railguns.[69]. z India aims to fire a one kilogram projectile at a velocity of more than 2,000 meters per second using a capacitor bank of 10 megajoules. A couple of years ago, a Imgur user by the name of NSA_Listbot showed off one of the most impressive DIY creations ever attempted: an actual handheld, portable railgun. Additionally, projectiles can be subject to some degree of ablation, and this can limit railgun life, in some cases severely.[43]. {\displaystyle x=-\infty } is the all-important projectile velocity, The rails need to withstand enormous repulsive forces during shooting, and these forces will tend to push them apart and away from the projectile. In most simple railguns, the magnetic field If the railgun is assumed to be 20% efficient at turning electrical energy into kinetic energy, the ship's electrical supplies will need to provide about 25 MW for as long as firing continues. Engineers are working to derive technologies developed for the DDG-1000 series ships into a battery system so other warships can operate a railgun. It was built with the goal of maximizing muzzle energy and was featured in the blockbuster film “The Dark Knight Rises”. {\displaystyle I^{2}R'x} Rail and insulator wear problems still need to be solved before railguns can start to replace conventional weapons. For space launches from Earth, relatively short acceleration distances (less than a few km) would require very strong acceleration forces, higher than humans can tolerate. Even smaller size and more power? The most promising near-term application for weapons-rated railguns and electromagnetic guns, in general, is probably aboard naval ships with sufficient spare electrical generating capacity and battery storage space. x I Even still, it’s obviously an extremely powerful weapon, and it’s amazing to see such a project progress through its various steps thanks to the detailed build album. A man claims to have built the first 3D printed handheld railgun capable of firing projectiles at an eye-watering 500mph. . [58], BAE Systems was at one point interested in installing railguns on their Future Combat Systems Manned Ground Vehicles. This shows that the force will be proportional to the product of [13], In 1923, Russian scientist A. L. Korol’kov detailed his criticisms of Fauchon-Villeplee's design, arguing against some of the claims that Fauchon-Villeplee made about the advantages of his invention. and an armature length {\displaystyle d} Rapid-fire operation was achieved by driving the launcher with multiple 83544 peak pulses provided by the CCEMG compulsator. The ARC-920's disposable power cell and ferric-shelled M645 FTP-HE projectile has dramatically decreased the weapon's total mass. = [24][26], Since 1993 the British and American governments have collaborated on a railgun project at the Dundrennan Weapons Testing Centre that culminated in the 2010 test where BAE Systems fired a 3.2 kg (7 pound) projectile at 18.4-megajoules [3,390 m/s (7,600 mph; 12,200 km/h; 11,100 ft/s)]. 2 As the magnetic field strengths required for such launches will typically be approximately 10 tesla (100 kilogauss), most contemporary railgun designs are effectively air-cored, i.e., they do not use ferromagnetic materials such as iron to enhance the magnetic flux. L [86] The hyper-velocity rounds weigh 10 kg (23 lb), are 18 in (460 mm), and are fired at Mach 7.[87]. A railgun projectile can reach several times the speed of sound faster than a missile; because of this, it can hit a target, such as a cruise missile, much faster and farther away from the ship. The launcher prototype was later tested at the U.S. Army Research Laboratory, where it demonstrated a breech efficiency over 50 percent. It follows that, where A coilgun is not a rifle as the barrel is smoothbore (not rifled). {\displaystyle {\widehat {\varphi }}} This halves the required current through the rails, which reduces the power fourfold. This is the SR-1, and it’s the first semi-automatic portable railgun ever built. [59][60][61] This program was the US Army's third attempt to replace the aging M2 Bradley. {\displaystyle I^{2}L'v} There’s lots of possibilities here, and given his track record, I don’t think we’ve seen the last of this talented DIY-er. [94][95][96], The railgun would be part of a Navy fleet that envisions future offensive and defensive capabilities being provided in layers: lasers to provide close range defense, railguns to provide medium range attack and defense, and cruise missiles to provide long-range attack; though railguns will cover targets up to 100 miles away that previously needed a missile. A future goal is to develop projectiles that are self-guided – a necessary requirement to hit distant targets or intercepting missiles. A multistage coilgun uses several electromagnets in succession to progressively increase the speed of the projectile. by insertion into the breech), it completes the circuit. and https://en.wikipedia.org/w/index.php?title=Railgun&oldid=1005803375, Articles with unsourced statements from October 2020, Articles with failed verification from November 2020, Articles containing potentially dated statements from January 2020, All articles containing potentially dated statements, Wikipedia articles that are too technical from December 2017, Articles needing additional references from December 2017, All articles needing additional references, Articles needing additional references from October 2020, Creative Commons Attribution-ShareAlike License, This page was last edited on 9 February 2021, at 14:04. behind the armature. [11] Fauchon-Villeplee filed for a US patent on 1 April 1919, which was issued in July 1922 as patent no. A faster-charging railgun? While similar in energy to the aforementioned test, the railgun used is considerably more compact, with a more conventional looking barrel. For a simple model, the barrel resistance and inductance can be assumed to vary as linear functions of the projectile position, In electric motor terminology, augmented railguns are usually series-wound configurations. Watch out, world. You have two ) and the current ( {\displaystyle s} [102] In 1991, they determined the properties required for developing an effective launch package as well as the design criteria necessary for a railgun to incorporate finned, long rod projectiles. Under ideal circumstances (equator, mountain, heading east) the system would cost $528/kg,[47] compared with $5,000/kg on the conventional rocket. The destructive force of a projectile depends on its kinetic energy and mass at the point of impact and due to the potentially high velocity of a railgun-launched projectile, their destructive force may be much greater than conventionally launched projectiles of the same size. Railguns have limited potential to be used against both surface and airborne targets. However, if the barrel is made of a magnetically permeable material, the magnetic field strength increases due to the increase in permeability (μ = μ0*μr, where μ is the effective permeability, μ0 is the permeability constant and μr is the relative permeability of the barrel). F This timeframe suggests the weapons are planned to be installed on the Navy's next-generation surface combatants, expected to start construction by 2028. The Navy is also developing directed-energy weapons for air defense use, but it will be years or decades before they will be effective. Even if current ships, such as the Arleigh Burke-class destroyer, can be upgraded with enough electrical power to operate a railgun, the space taken up on the ships by the integration of an additional weapon system may force the removal of existing weapon systems to make room available. [115][116] In March 2018, it was reported that China confirmed it had begun testing its electromagnetic rail gun at sea. “The Railgun’s ability to defend against enemy threats from distances greater than ever before improves the capabilities of our armed forces.” On December 10, 2010, the U.S. Navy made history at the Naval Surface Warfare Center-Dahlgren Division with our Laboratory Railgun. The railgun in its simplest form differs from a traditional electric motor[5] in that no use is made of additional field windings (or permanent magnets). His love of Even if conventional defense systems react fast enough, they are expensive and only a limited number of large interceptors can be carried. assuming the rails are lying in the xy plane and run from x = 0 back to At one end, these rails are connected to an electrical power supply, to form the breech end of the gun. [8] For potential military applications, railguns are usually of interest because they can achieve much greater muzzle velocities than guns powered by conventional chemical propellants. Helical railguns[70] are multi-turn railguns that reduce rail and brush current by a factor equal to the number of turns. Verified Purchase. ), the distance between the central axes of the rails ( F This limited some early research railguns to one shot per service interval. It was the first time in history that such levels of performance were reached. Using scanning electron microscopy and other diagnostic techniques, they evaluated in detail the influence of plasmas on specific propellant materials. {\displaystyle VI} [47] Because of strong acceleration, this system would launch only sturdy materials, such as food, water, and – most importantly – fuel. Alternatively, very long rail systems may be used to reduce the required launch acceleration. Unlike a coilgun or gauss rifle which use a series of electromagnets to pull a magnetic projectile down a tube at great speeds, a railgun operates … Watch the Navy's Railgun Fire From Every Angle The railgun takes the first shot of its commissioning series. d They do not currently exist in a practical, usable form. [16] This machine was operational from 1962 and was later used to power a large-scale railgun that was used as a scientific experiment. Plasma railguns are used in physics research and they have been explored as a potential trigger mechanism of magneto-inertial fusion. 3 While often confused with Magnetic Accelerator Cannons, rather than accelerating their projectiles through the use of magnetic coils, railguns, as their name suggests, utilize magnetic rails to perform this task. In almost all coilgun configurations, the coils and the gun barrel are arranged on a common axis. Also, by firing more aerodynamically streamlined projectiles at greater velocities, railguns may achieve greater range, less time to target, and at shorter ranges less wind drift, bypassing the physical limitations of conventional firearms: "the limits of gas expansion prohibit launching an unassisted projectile to velocities greater than about 1.5 km/s and ranges of more than 50 miles [80 km] from a practical conventional gun system. For comparison, 50 MJ is equivalent to the kinetic energy of a school bus weighing 5 metric tons, travelling at 509 km/h (316 mph; 141 m/s). [90] Most current destroyers can spare only nine megawatts of additional electricity, while it would require 25 megawatts to propel a projectile to the desired maximum range [91] (i.e., to launch 32MJ projectiles at a rate of 10 shots per minute). R The on-board electronics successfully measured in-bore accelerations and projectile dynamics, for several kilometers downrange, with the integral data link continuing to operate after the projectiles impacted the desert floor, which is essential for precision guidance.[123]. {\displaystyle {\mathrm {d} x}/{\mathrm {d} t}} As briefly discussed above, the stresses involved in firing this sort of device require an extremely heat-resistant material. This causes three main problems: melting of equipment, decreased safety of personnel, and detection by enemy forces due to increased infrared signature. [110] Early papers describe the plasma-propellant interaction group at ARL and their attempts to understand and distinguish between the chemical, thermal, and radiation effect of plasmas on conventional solid propellants. 3D printing used to make first real handheld railgun, which fires plasma projectiles at 560 mph. However, there are other theoretical applications currently being researched. [84], In 2014 the U.S. Navy had plans to integrate a railgun that has a range of over 16 km (10 mi) onto a ship by 2016. d {\displaystyle d} [55], Railguns are being examined for use as anti-aircraft weapons to intercept air threats, particularly anti-ship cruise missiles, in addition to land bombardment. In exchange, ship survivability may be enhanced through a comparable reduction in the quantities of potentially dangerous chemical propellants and explosives currently employed. x Solid armatures may also 'transition' into hybrid armatures, typically after a particular velocity threshold is exceeded. The most important gauge of power supply effectiveness is the energy it can deliver. {\displaystyle l>3d} So, if the armature connects the ends of two such semi-infinite wires separated by a distance, Thus far, the project is self-funded. Low power, small scale railguns have also made popular college and amateur projects. This basic configuration is formed by a single loop of current and thus requires high currents (e.g., of order one million amperes) to produce sufficient accelerations (and muzzle velocities). It is one of several United States Government efforts to develop plasma-based projectiles. I d However, the project was abandoned once World War I ended later that year on November 3, 1918. This machine could be supplied by a dedicated generator. [39][40][41][42] The rails also repel themselves via a sideways force caused by the rails being pushed by the magnetic field, just as the projectile is. A railgun consists of two parallel metal rails (hence the name). [10][11] During World War I, the Director of Inventions at the Ministry of Armaments, Jules-Louis Brenton, commissioned Fauchon-Villeplee to develop a 30-mm to 50-mm electric cannon on July 25, 1918 after delegates from the Commission des Inventions witnessed test trials of the working model in 1917. Maximizing the inductance gradient is but one of the challenges faced by the designers of railgun barrels. It follows that the magnetic field will neither be constant nor spatially uniform. At this time it is generally acknowledged that it will take major breakthroughs in materials science and related disciplines to produce high-powered railguns capable of firing more than a few shots from a single set of rails. [109] In 2004, ARL researchers published papers examining the interaction of high temperature plasmas for the purpose of developing efficient railgun igniters. Korol’kov eventually concluded that while the construction of a long-range electric gun was within the realm of possibility, the practical application of Fauchon-Villeplee's railgun was hindered by its enormous electric energy consumption and its need for a special electric generator of considerable capacity to power it. China is now one of the major players in electromagnetic launchers; in 2012 it hosted the 16th International [56] A railgun projectile without the ability to change course can hit fast-moving missiles at a maximum range of 30 nmi (35 mi; 56 km). Although these speeds are possible, the heat generated from the propulsion of the object is enough to erode the rails rapidly. {\displaystyle v} ", "How To Waste $100 Billion: Weapons That Didn't Work Out", "Laser Weapons Not Yet Ready for Missile Defense", "Navy's Magnetic Super Gun To Make Mach 7 Shots At Sea In 2016: Adm. Greenert", A Laboratory Railgun for Terminal Ballistics and Arc Armature Research Studies, An Investigation of the Ballistic Performance for an Electromagnetic Gun-Launched Projectile, Thermophysical Behavior of Armature Materials During a Pulsed Electrical Discharge, "China's aims to arm warships with railguns that may not matter in war - Business Insider", "China Could Have the World's Most Powerful Naval Gun by 2025", "What is a hypersonic railgun? s October 19th, 2015 at 9:43 AM. / [76] At the University of Texas at Austin Center for Electromechanics, military railguns capable of delivering tungsten armor-piercing bullets with kinetic energies of nine megajoules (9 MJ) have been developed. The railgun uses a pair of parallel conductors (rails), along which a sliding armatureis accelerated by the electromagnetic effects of a current that flows down one rail, into the armature and then back along the other rail. The first weaponized railgun planned for production, the General Atomics Blitzer system, began full system testing in September 2010. [3], As of 2020, railguns have been researched as weapons utilising electromagnetic forces to impart a very high kinetic energy to a projectile (e.g. While not nearly as powerful as a cruise missile like a BGM-109 Tomahawk, that will deliver 3,000 MJ of destructive energy to a target, such weapons would, in theory, allow the Navy to deliver more granular firepower at a fraction of the cost of a missile, and will be much harder to shoot down versus future defensive systems. [30] ARL was responsible for assessing the performance of the launcher, which was tested at the ARL Transonic Experimental Facility in Aberdeen Proving Ground, MD.