The railgun was fired at 10.64MJ (megajoules) and the projectile attained a muzzle velocity of 8,268 fps (2,520 mps). Photograph taken from a high-speed video camera during a firing of lab electromagnetic railgun (EMRG) at Naval Surface Warfare Center, Dahlgren, Virginia. Note the Compensated Pulsed Alternators on the lowest deck, the small size of the projectile storage and the projectile emerging from the armature/sabot. This view shows the Notional Rail Gun occupying the same volume as used by AGS. Notional Hypersonic Projectile and Gun Barrel Cross Section. The energy requirements of a Rail Gun are very high, requiring an Integrated Power System (IPS) approach whereby the ship's power plant is used in place of the conventional propellant. The railgun program was seen as being useful for conventional naval gunsīut this program was also cancelled in June 2021. The Hypervelocity Projectile (HVP) originally developed as part of Future R&Dįunding will now go to other weapon systems such as anti-missile lasers. The Navy had spent about $500 million to develop the weapon. In July 2021, the USN cancelled the Railgunĭevelopment program, citing unresolved problems with barrel life and a low rate ofįire. Weapon" ultimately proved to be unsuccessful. Like the Medieval search for the Holy Grail, the USN's search for a "Super Level of funding may move the railgun into the "promising, but not recommendedįor further development" category in the near future. Requested in fiscal year 2020 and roughly $28 million in fiscal year 2019. This weapon has fallen out of favor in the USN, with funding reduced forįiscal year 2021 budget request to $9.5 million, down from around $15 million Under construction that will allow multiple shots and energies approaching (3.2 kg) test slug projectile attainedĪ muzzle velocity of 8,268 fps (2,520 mps). The railgun was firedĪt 10.64MJ (megajoules) and the 7 lbs. On 31 JanuaryĢ008, test firing began with this launcher. Surface Warfare Center's Dahlgren Division Laboratory. (ONR) Electromagnetic Launch Facility, located in Virginia at the Naval Large kinetic energies, long range, and short flight times.Ī 32 megajoule lab launcher in June 2007 to the Office of Naval Research The hypersonic velocities generated give the projectiles This reduces the vulnerability of the ship to damage, as thereĪre no magazines, only shell rooms, and the shells themselves may not containĪ burster. Without the hazards of chemical explosive charges used in conventional Generating a propulsive force which slides it down the rails.Ībility to produce great accelerations and thus high muzzle velocities, This current flow creates a magnetic field around the armature, Current from the power source is sent down one rail,Īcross the armature, and then down through the other rail back to the power Of two parallel rails electrically connected via an armature which holds The Lorentz force created on a moving armature. Smaller footprints, inherent graceful degradation should one or more alternators The latter approach appears to have the advantages of Pulsed alternators capable of delivering a momentary high spike of energy Of propellants, the output of the ship's power plant may be shunted intoĪ large capacitive device, storing high levels of energy, which are released Launch velocities without the use of conventional propellants. Electromagnetic Rail Gun ProposalRail guns have long been seen asĪ "Holy Grail" of naval weapons, as the technology promises hypersonic NASA Engineers Propose Combining a Rail Gun and a Scramjet to Fire Spacecraft Into Orbit. Available: .com/Science/Cool-Astronomy/2010/0914/NASA-considering-rail-gun-launch-system Available: .com/fansites/future-weapons/episodes/episode-guides-3.html Available: .co.uk/sciencetech/article-1338112/U-S-Navys-supergun–electromagnetic-rail-gun-obliterates-targets-100miles-away.html The gun that can destroy an enemy 100 miles away and fire bullets at eight times the speed of sound. Available: om/scitech/0/navy-railgun-shoots-bullets-electromagnet/ Navy Sets World Record With Incredible, Sci-Fi Weapon. Not Your Grandpa’s Shootin’ Iron: Rail Guns. Adams, Naval rail guns are revolutionary United States Naval Institute. Freedman, Magnetic Field and Magnetic Forces in University Physics, 12th ed.
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