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Topic: Railgun

	Electromagnetic Railgun - Popular Science
		Projectiles fired from an electromagnetic railgun will travel up to 290 miles in less than six minutes, exiting the atmosphere before hurling into their target at a velocity of 5,000 feet per second.
		The electromagnetic railgun’s projectiles will cover 290 miles in six minutes—initially traveling 8,200 feet per second and hitting their target at 5,000 feet per second.
		Also appealing is that the electromagnetic railgun’s missiles do not contain volatile explosives; the weapon does its work with kinetic energy.
	www.popsci.com /popsci/technology/generaltechnology/64669aa138b84010vgnvcm1000004eecbccdrcrd.html (790 words)

	Rail Gun
		A railgun uses the flow of electricity to accelerate a projectile to incredibly high velocities.
		Railguns are a relatively new technology and are much less efficient than other chemical means.
		Railguns that operate with a total efficiency of over two percent are considered highly efficient.
	www.securityarms.com /20010315/galleryfiles/1200/1280.htm (239 words)

	Railgun - Wikipedia, the free encyclopedia
		Railguns utilize an electromagnetic force called the Lorentz force to propel an electrically conductive projectile that is initially part of the current path.
		Railguns are being pursued as weapons with projectiles that do not contain explosives, but are given extremely high velocities: 3500 m/s or more (for comparison, the M16 rifle has a muzzle speed of 975-1025 m/s), which would make their kinetic energy equal or superior to the energy yield of an explosive-filled shell of greater mass.
		Since a high-velocity railgun would accelerate the projectile over a shorter time, the force exerted on the projectile (and hence, the recoil force exerted on the weapon) would be greater.
	en.wikipedia.org /wiki/Railgun (2351 words)

	Helical railgun - Wikipedia, the free encyclopedia
		A railgun is in essence a single-turn motor.
		The helical railgun is in fact a cross between the railgun and the mass driver.
		A helical railgun was built at MIT in 1980 and was powered by several banks of (for the time) large capacitors (circa 4 farads).
	en.wikipedia.org /wiki/Helical_railgun (203 words)

	Muzzle arc suppressor for electromagnetic railgun - Patent 4733595
		When the railgun projectile reaches the resistive inserts, the voltage across the varistor increases to above the varistor breakdown voltage, thereby commutating the railgun current from the projectile to the varistor, and dissipating excess magnetic energy through resistance heating of the varistor.
		The railgun according to claim 1, wherein the triggering means comprise resistive inserts positioned along the inside of the rails.
		As the projectile leaves the muzzle end of the railgun, thus opening the rail-projectile-rail circuit, the energy built-up in the magnetic field surrounding the rails is sufficient to cause arcing from the rail ends to the projectile.
	www.freepatentsonline.com /4733595.html (2578 words)

	TABLETOP RAILGUN (Site not responding. Last check: )
		Railguns are electromagnetic launching devices based on the most fundamental concepts of electricity and magnetism.
		This cutaway view of the POC railgun shows the proper alignment of the rail in relationship to the coils.
		This circuit is perhaps the life-blood of the railgun.
	www.glubco.com /weaponry/railgun.htm (1012 words)

	B-Team's Railgun Information (Site not responding. Last check: )
		A Railgun is a device that uses to electromagnetically charged "rails" to propel an object with a tremendous velocity through a given space.
		Railguns were first brought about in the late 60's as a means of propelling warheads in the military.
		This is due largely in part that the projectiles that railguns fire travel at such tremendous velocities that they actually pick up part of the rails and carry them with them.
	www.homewood.k12.al.us /compsci/projects98/bteam/railguns.html (265 words)

	PowerLabs NEW Rail Gun!
		The original railgun design was completely experimental; built, assembled and operated solely by myself, on my first year of engineering school and being entirely based on my knowledge of electricity and magnetism at the time.
		RailGuns differ from other means of accelerating objects in that the acceleration in the rails occurs purely by magnetic repulsion.
		Railgun 2.0 was originally fired on the summer of 2006 for a film crew filming an episode of a Discovery Channel show.
	www.powerlabs.org /railgun2.htm (3720 words)

	H&K Meteor Railgun (Site not responding. Last check: )
		Railguns are very powerful weapons, and are more difficult to defend against than pure energy weapons, but in space they have a large disadvantage due to the recoil that they produce.
		In addition to the thruster the railgun is equipped with its own laser targeting system, microchips, and a datalink to the users suit.
		This Railgun was the standard weapon for all of the Space Predator power armors on board of the De Ruyter.
	www.kitsune.addr.com /Rifts/Rifts-Equipment/HK_Meteor_Railgun.htm (678 words)

	PGATOUR.com - Railgun's offering is no ordinary putter
		On the lighter side, Railgun itself offers the observation that not only does its putter resemble a catamaran, it might look like railroad tracks, a branding iron, garden tool, metal detector, pecan picker, roman numeral III, I-beam or pontoon boat.
		In general, shafts are available in lengths from 32 to 36 inches; putter weights range from 300 to 310 grams, to match the speed of the greens that you usually play (lighter for faster, heavier for slower).
		Railgun stresses its ease of alignment, consistency of stroke/tracking, stability at impact and superior roll of the ball.
	www.golfweb.com /print/story/3368075 (1018 words)

	UMKC SPS Railgun Experiment
		The theory behind the railgun is not overly difficult.
		The F stands for the force which will be acting on the bullet, the B is the magnetic field, I isthe current through the rods (rails) and L is the length between the rods.
		Once the capacitor bank is charged, a switch is thrown (a starter solenoid from a car) and the current flows through the railgun, causing the projectile to fire.
	cas.umkc.edu /physics/sps/projects/railgun/railgun.html (468 words)

	Chapter 2: Electromagnetism
		A railgun is a device for accelerating an object by running electric current through it along a pair of rails.
		If larger amounts of power are used, the railgun becomes a one-shot device, as the rails are destroyed in the process of shooting the gun, due to arcing and flexing of the rails.
		The railgun is really just two of these battery rollers connected end-to-end.
	www.scitoys.com /scitoys/scitoys/electro/railgun/railgun.html (1138 words)

	[No title]
		A railgun is ideal because, well, starting at the speed of light, all you would need to shoot is a grain of sand to destroy something.
		Railguns are more of a space based weapon, and they still are not fast enugh to compete with Directed Energy Weapons.
		But, if one has to be honest, all we know for sure, at this point, is that a railgun, given an adequate electrical supply, can launch a projectile at velocities exceeding the muzzle velocity of most (from a practical point of view, all) guns using smokeless powder as a propellant.
	www.strategypage.com /militaryforums/29-22.aspx (4558 words)

	Electromagnetic Railgun Theory, Design, Construction, and Testing
		Railgun Instrumentation Instruments to measure peak values of voltage and current pulses.
		I think of the term railgun as referring to a single unique device, and the the term "rail gun" as referring to a gun and a rail or rails.
		Railgun and "rail gun" are different just as darkroom and "dark room" or heavyweight and "heavy weight" refer to different things.
	www.matthewmassey.com (687 words)

	Amateur Railgun Production Journal
		A railgun consists of two parallel conductors, the "rails," bridged by a non-ferromagnetic conducting armature.
		The railgun is fired by creating a current loop that flows from some large power source, down one rail, across the slug, and back up the other rail.
		This current loop induces an enormous magnetic field which, in turn, pushes the armature down the rails with a force proportional to the magnitude of the current, the separation distance of the rails, and the magnetic field.
	www.railgun.org (533 words)

	Welcome to railgun.com
		The Railgun II ingrains a consistent, perfect stroke because of the perpendicular lines in its barrel, its spacer bars and the spacing between the barrel and the spacer bars — virtually impossible with conventional design.
		The Railgun II is perfectly symmetrical with the shaft in the middle of the barrel for perfect balance and absolute pendulum stroke.
		A Railgun II putter can come with a detachable rubber inset that can be inserted at the end of the grip so you don’t have to bend over to pick up your ball when you finish putting.
	www.railgun.com (1986 words)

	Chapter 2: Electromagnetism
		A railgun is a device for accelerating an object by running electric current through it along a pair of rails.
		When large amounts of power are used, the railgun becomes a potent weapon.
		If larger amounts of power are used, the railgun becomes a one-shot device, as the rails are destroyed in the process of shooting the gun, due to arcing and flexing of the rails.
	sci-toys.com /scitoys/scitoys/electro/railgun/railgun.html (1138 words)

	Mouser & Holly's Railgun Design Project. (Site not responding. Last check: )
		Much of the content focuses on the coilgun, but there is some content and many links relavent to railguns.
		Mitch Rappard and Mike Passer give a cursory overview of railgun theory and a somewhat detailed description of their small (5.5" rails) implementation.
		A patent held by Galen Collins which describes a "compact personal railgun," though what it really describes is a coilgun.
	web.mit.edu /mouser/www/railgun (332 words)

	Railgun Research (Site not responding. Last check: )
		The railgun project was initiated in 1986 and was supported by the Space Defense Initiative Office at a total value of over two million dollars.
		New laboratory railgun designs were conceived and implemented at the CLA laboratories to permit carefully controlled repeatable experiments to be performed.
		Extensive theoretical analysis of the three-dimensional electromagnetic behavior of railgun structures showed that the fundamental force equation used to evaluate railgun performance was incorrect.
	cla.utsi.edu /html/research/fluids/railgun.htm (401 words)

	Halfbakery: Rifled Railgun
		If the railgun were used as a weapon it also increases the accuracy of the shot.
		A battery of railguns operating in concert, either in orbit or on the surface, could be used as an antimeteor defense - which I suppose is a weapon of a sort.
		Second: there's no need; railguns are point-and-shoot devices and no leading of the target is required over the short distances (maybe 20 miles max) between gun and target.
	www.halfbakery.com /idea/Rifled_20Railgun (1202 words)

	FOXNews.com - Navy Tests High-Tech Railgun in Virginia - Science News \| Current Articles
		Future railgun ordnance won't be large and heavy, either, but will deliver the punch of a Tomahawk cruise missile because of the immense speed of the projectile at impact.
		He said the railgun will extend that range to more than 200 nautical miles and strike a target that far away quickly — in 6 minutes.
		Garnett said specifications call for each railgun to be capable of firing four to six times a day, but he expects to reach a maximum of 10 times per day.
	www.foxnews.com /story/0,2933,244593,00.html (1167 words)

	DuvalMagic's Quake2 Weapons and Combat FAQ - Railgun (Site not responding. Last check: )
		The railgun is a unique weapon in that it is like a projectile in the sense that you can see it in the air, but it should be used for most purposes like a hitscan weapon.
		Since the beam that the Railgun fires is not an actual game object, the weapon could not be considered to be a projectile.
		Another interesting tidbit that Kelly Bailey pointed out is that if a railgun kills you, the data that handles the death will be sent before the data that handles the visible railgun effect.
	ucguides.savagehelp.com /Public/archive/q2wfaq/faq_railgun.html (345 words)

	No Title
		In a railgun, the inductor is a single-turn coil consisting of the power source, rails, and armature.
		We were tempted to use the flux rule for motional EMF (see Griffiths 7.13), where the time derivative is pulled outside the integral because the magnetic field is assumed to be constant in time.
		It is hoped that Mathematica will be able to solve this differential equation to give an analytical form of the equations of motion for the slug in terms of physical variables like the mass of the slug, rail separation, and capacitance.
	www.railgun.org /physics (1716 words)

	Electromagnetic Railgun Successfully Tested
		Naval railguns offer the potential to deliver hypersonic projectiles at very long ranges (200+ nautical miles) in less than six minutes.
		Railguns use bursts of electrical energy to generate electromagnetic forces to accelerate a projectile.
		In a projectile flight profile, which occurs mostly in the exoatmosphere, airspace encroachment would be minimized, and in a direct fire mode the projectile would reach a surface target in seconds.
	www.globalsecurity.org /military/library/news/2003/05/mil-030512-navsea04.htm (500 words)

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