Navy Awards EM Railgun Contract

U.S. Navy Demonstrates World’s Most Powerful Electromagnetic RailgunThe Navy has awarded BAE Systems a contract to develop a next-generation launcher with higher rates of fire for its now-in-development Electromagnetic Railgun, service and industry officials explained.

The Office of Navy Research is currently developing an EM Railgun which uses massive “pulses” of electricity to propel a projectile or an explosive at distances greater than 100 nautical miles.

“You get much higher velocity by creating an electromagnetic force behind the projectile,” said Amir Chaboki, program manager for advanced systems, BAE.

The pulses from the weapon can achieve incredible speeds of Mach 6, Mach 7 or faster, thus striking long distances in a short period of time, he added.

An EM Railgun launcher is described as a long-range weapon that fires projectiles using electricity instead of chemical propellants, according to statements from the ONR.

“Magnetic fields created by high electrical currents accelerate a sliding metal conductor, or armature, between two rails to launch projectiles at 4,500 mph to 5,600 mph,” the ONR website states.

ONR Launched the EM Railgun program in 2005. The program began with Phase I wherein the technology was demonstrated as a “proof-of-concept.”  The program is now moving well into Phase 2, an effort to refine and improve the technology and be able to sustain more rapid rates of fire.

The Navy has already demonstrated the ability to fire a single shot or “pulse” from the weapon at the Naval Surface Warfare Center, Dahlgren, Va. The ONR’s current Phase II launcher contract is aimed at developing the ability fire 6 –to-10 pulses per minute, Chaboki explained.

BAE plans to have its first prototype versions of the launcher weapon ready by as early as next year, Chaboki said.

A Railgun works by creating a magnetic force between two power rails conducting large amounts of electricity, Chaboki explained.

“Schematically you have two power rails that conduct electricity. We send a pulse onto one rail then connect the two rails. Magnetic force then pushes the projectile,” he explained.

The EM Railgun needs large amounts of electrical power, some of which could be stored in batteries if the weapon were transported on a ship, he said.

About the Author

Kris Osborn
Kris Osborn is the managing editor of Scout Warrior.
  • hibeam

    EM Railgun below deck. Windmills on deck. Everybody happy.

  • blight_

    I find it interesting that the priority is rate-of-fire over reducing the power demands. I suppose this means that the power demand is deemed “acceptable” with whatever technology is in the pipeline…or, the power demand is /projected to be eventually acceptable based on BAE’s powerpoint about reduction of the power demand/; which means if BAE’s timetable slips, we could have invested significantly into rate-of-fire for railguns without addressing the power demands required in shipboard use.

    Concurrently, I imagine they are working on flywheels or super-capacitors, which would address the power demand on firing and the rate-of-fire question. That said, using direct mechanical energy from a diesel or a gas turbine to spool up a flywheel is an option.

    We’ll find out in a few years.

    • Nick

      The minimum amount of energy to fire the projectile is fixed (F=MA), there’s probably some loss in the system but it’s likely negligible compared to the minimum energy.

      The hard problem to solve here is rail erosion and with rapid firing you’ll likely need some intense method to tool the rails between shots.

    • David

      They may consider power consumption as part of the rate of fire equation.

    • Robert

      You make a lot of sense, in your statement that such technology in that it would need to store energy for “immediate use”, the technology would be some kind of low mass but also able to tolerate high rotational speed’s. Ie; A flywheel based on more recent material’s. I can’t see any current battery system being as robust, or since batteries of any kind, are not natural capacitor’s, but flywheel’s are, you get it.

      Never the less, if we (the US) has an advantage on any technology, in this case a ship mounted rail gun, it’s only going to remain a secret…

      Until we use it in combat. You can bet after that there will be a lot of people staying up reading old journal’s that have anything to do with EM Rail Gun’s. After all, since then we would have demonstrated we have one, after then everyone else will want to play…

  • Thunder350

    The sooner the Navy gets this thing up and running, the sooner we can shoot giant transformers trying to access secret doomsday weapons hidden inside Egyptian pyramids.

  • jake

    1 small step towards photon torpedoes ;)


      I would aim for Quantum Torpedoes…….

  • Ben


    I’d hate to have seen the railgun get the axe in favor of ship-borne lasers. These will prove to be much more useful when the tech matures.

  • Matt

    I’m interested to know if the curvature of the earth is greater than the ‘drop’ on the projectile? that would rule out ship to ship engagement at medium distance as the rounds would fly over head.

    • blight_

      Gravity will win before the curvature of the earth becomes a factor.

    • Ben

      Easy enough to “dail-in” the right charge. Not all shots need to be fired at full strength.

    • hunter76

      The highest number reported was Mach 7. Gravitational escape velocity on Earth is about Mach 34. The projectile will come down.

      Once they get the “gun” working dependably, they’ll need to develop smart munitions for it, otherwise it’s pretty useless.

      • Numerics

        Actually Mach 24 is all thats needed to send it into orbit… still aways to go. Mach 34 and you escape Earth’s gravity altogether, sending the projectile into Solar Orbit.

    • Joseph Kunder

      The projectile would have to be fired atvs speed faster than the earth rotates. It might effect in which direction it is fired weather it is with the rotation or against.

  • elportonative77

    So does this mean the General Atomics variant is a dud or canned?

    • David

      I think it was a technology demonstrator much like the x-47.

    • wpnexp

      General Atomics is likely going to at the game for a while. Better to have at least two companies in the game to keep the competition going. Also, I believe the Blitzer has some inherent use on the Army side too.

  • ohwilleke

    Why is there a huge amount of smoke and fire in a picture illustrating a story about a rail gun? Isn’t the whole point of a rail gun to dispense with hydrocarbon ignition at the launch stage?

    • ASF
      • SJE

        Yes. Its plasma

    • ben

      more specifically, the erosion of the projectile and rails produces a metal vapor that is is at around 3000 degrees, hence the incandescence.

    • SJE

      its the clouds of awesomeness


    So, we have the gun. What about, say, the energy source, the platform…………..?

    • Rob C.

      Zulwalt Class would be able to handle this monster. Other platforms may include the CVNs since their nuclear powered. Problem is the bottleneck Congress has made and inflated prices of the builders. So nothing new can be built. I doubt the Burkes can be modified any further hand stress this weapon going to produce.

      • wpnexp

        Actually, the power generation of the original DDG-51s is the problem from what I hear. Additional generators would have to be added, and the capacitors and batteries would take up a lot of space. Not sure if just removing the 127mm gun would make enought room. As the Block III will be a different design, it could be enlarged somewhat. Also, developing the ship using all-electric pwer systems would help, as power can be diverted to various systems as needed.


    Lets see the chinese version, i bet they must have stolen the blue prints from the BAE secure server by now and making there own version as we speak.

  • Stan

    I can certainly see the advantage of not having to store powder on the ship. Also having a high speed projectile for bombarding hardened shore targets or delivering a guided projectile to the target quickly is nice in assymmetric warfare. But what will this weapon enable the Navy to do in an engagement with the Chinese which while highly hypothetical is likely to not be assymmetric?

    • STemplar

      Keep them 100 miles from a surface force lest they desire to be peppered with Mach 7 Tungsten death rods…..

    • Ben

      Possibly defend against DF-21s or other aerial threats.

      Save money by using place of expensive cruise missiles.

      Quicker and more precise response.

    • oblatt1

      nothing this technology is designed to extract design funding not produce an useable weapon. We are basically throwing dumb rocks at an enemy using smart networked hunter killers.

  • Muldoon

    1) How long must the rails be to impart the desired velocity?
    2) I can see banks of selectable super capacitors armed and ready for sequential discharge – then rate of fire becomes a factor of (a) how quickly the next projectile can be loaded, or (b) mandatory rail cool down…

    • pyrotak

      It doesn’t even need to be reloaded after ever shot, I bet they can design it so that it works similar to metal storm where you have multiple projectiles in the same tube (if they wanted to that is)


  • John Zimmer

    What’s the projectile made of?

    • Ben

      It’s just a hard metal slug, and that’s really all it needs to be when traveling at those speeds. If they ever ramp this thing up to the 33 megajoule goal, even a solid steel slug would hit its target with the force of a tomahawk cruise missile. No explosives necessary.

      • Hans Zimmer
      • Tri-ring

        There is one property the slugs requires for them to be shot out.
        They need to be conductive so electricity can flow from one rail to the other to create a circuit.

    • Paul

      I wager it has to be tungsten or DU coated steel for it to keep it from the round from warping.

    • William_C1

      Also under consideration is a shrapnel shell containing up to 10,000 tungsten cubes that would disperse before impact, at a velocity enough to cut through the roof armor of a tank or anything else.

  • Ricky

    Shou,d make tanks with rail guns now. Or try making it into a rifle of some sort.

  • COchronic

    This might be a stupid question but what’s the possibility for a mis-fire? When they start to get up into the higher rate of fire the probability of over heating or a malfunction increases I could imagine the amount of destruction it’d cause if that energy were released on a ship

    • Tri-ring

      It depends on what you mean by “mis-fire”.
      It has no chemical explosives using electricity as propellent. The worst thing that I could think is the connectivity between rails are disrupted due to bad spacing in which an arc discharge will occur between the projectile and the rail.

    • SJE

      There are tremendous stresses on this system, which is why its so difficult. The early cannons were dangerous and tended to explode on the users (as in explode sideways) until we got good enough with metallurgy. With the rail gun, you have enormous current and EM forces: just think how much energy is required to accellerate something to Mach15 over a few meters. The amount of energy turns the air into plasma, which basically eats up anything. A few years ago you had to basically rebuild the gun after firing. I don’t know how far we have gone since then.
      Perhaps some advances in superconductors have occured.

  • rty

    When it comes to increasing rate of fire are we talking about:
    – multiple shots fired with a single charge?
    – smaller projectiles fired more frequently?

    As an aside, does anyone worry that we are so obsessed with the next-generation technology that we we are missing the current generation technology? Wouldn’t a bunch of missile cruisers help us out a lot more today than a high-tech gun that destroys itself a little bit every time we fire it?

  • Belesari

    Considering modern GPS guided artillery takes a make of 15,000 g’s and these rounds will take something like 60,000 ‘gs and need a entirely different guidance system I don’t see this as a land attack weapon so much as a hell of a BMD weapon.

    Power is going to be a bitch though.

    • SJE

      There is no guidance system. Something this fast is more like direct fire.

      • blight_

        If we’re talking about using railguns as indirect fire support in the near future, then it means that we will be firing railguns at low accelerations so as to favor guidance systems.

        That said, very long rails should be able to accelerate a projectile more gradually…?

        • Belesari

          The problem is unless it hits a certain speed its just not going to be worth it. And while longer rails would allow for more time to accelerate the projectile the problem would still be how do we guide it from a cone of fire and plazma.

      • Belesari

        Yea turns out it just doesn’t work far more resistance than they thought.

    • EW3

      Been thinking on this problem going back a few years.
      The weakness in a GPS is the bonding of the internal chip to it’s substrate and then the connection from the chip to the board it’s mounted to.
      I am familiar with accelerometer chips that can survive over 50KG’s. (See memsic MXP7205VF). So silicon to chip substrate would seem to be solved.
      The same company makes modules using their chips and they spec 1000G for 1 ms. Since this is a mass produced device, suspect the bright guys at a place like Draper Labs can make this work for a price.

      • Tri-ring

        Big problem is how to get mechanical wings to operate after being zapped by a huge load of electricity during firing.

  • Dfens

    I’m glad they are paying for development of these guns — again. At this rate, in 30 or 40 years the US Navy might actually field a weapon. Of course, it’s not like the defense contractor will make a profit off of every single day they drag things out and jack up costs. Oh wait, yes, yes it is just like that. I’m sure they’re too stupid to notice. No, it seem to be only the US taxpayer that’s too stupid to notice how their money is being spent. The defense contractors seem to be well aware of how to maximize their profits. Who knew capitalism works?

  • hibeam

    In California we haved used this concept to develop very fast trains. Its like getting on an Airplane and then taxing all the way to your destination at over 100 miles an hour. Except its a train. And it costs way more. We invented this concept. Get your own.

    • Jeff

      Are you talking about that train that was “invented” by the Engineers in California that no one has ever seen or heard of? Or are you talking about that poor copy of the High Speed Bullet Trains that Japan and Germany have been using for years? I know it was a good deal anyway, since its only a short walk from the Victorville Station Parking lot to the front door of Ceasers Palace.

    • blight_

      Elon Musk thinks people will get on his pneumatic tube to SF…VEGAS!

  • oblatt1

    Another operationally useless wunderwaffen that is supposed to leapfrog our military into the future but really will just seal its fate. The real innovation is happening in russian and chinese missiles not these throwbacks to the battleship era.

  • BobK

    The Navy is having problems with maintance of their current fleet due to the force budget cuts, yet they have money to pay for this? Really?

  • hibeam77

    Two Alka-Seltzer and a warm glass of Dr. Pepper. Same result.

  • nimrod

    waste of money. we should have more big guns on destroyers and less of this unproven crap. We need armor on our ships instead of these thin tin foil hulls of modern ships. And we need thousands of ships not mere 200’s.

    • Rob C.

      Quanity over quality? That may have worked in World War II era, but today ships can do alot more than those ships of the past. I agree US need more ships, but i rather seem them build right. Development of ships and their weapon systems are insanely more expensive in comparison to 1930s-1940s dollars when events leading to and into WW2 made development happen rapidly. US Fleet and other arms forces were under allot economic stress back then too. Recovering from the original Great Depression being one of them.

      Also, alot know how and means to replicate and make classic weapons like the Iowa Class Battleship’s 16 inch guns are barely possible today and insanely more expensive too. I remember reading when US Congress wanted see if was possible build NEW Battleships and found out it was in billions, in 1980’s dollars.

      • blight_

        Building a new capital ship is a stupendously expensive venture.

        If you have to choose between developing a new carrier program and new battleships…the choice is obvious.

        Don’t forget we had tons more shipyards back then than we do now. We are better served with COTS ships on the small end, and building destroyers and “cruisers” (question: cruiser with cruiser hull, or up-scaled destroyer hull?)

        Any of the WW2 admirals would’ve gladly traded the Lex for the striking power of a supercarrier. Let’s not overglorify WW2 too much…though in WW2 the Navy could have significant combat power in many places at once in the same general theatre, a capability we no longer quite have.


          Ahem, Pearl Harbor? I mean, that is probably the big thing. In a world where planes can knock out a ship from 100 miles, and subs can operate undetected, in great depths, how is a large battleship suppose to survive? Some might even put that argument to the carrier (though it striking power, in my opinion, makes it indispensable) as a large ship that is an easy target. CIWS and Missile launchers only go so far…..

        • Dfens

          Name one ship that is COTS. There are none. What we have is specially developed small ships that are built in quantities of ones and twos. Before we had heavily armored ships that were built by the hundreds. Today’s ships can be sunk with a .50 mounted on the deck of a pirate scow. The ships we used to have could take a pounding and still deliver.

          As for WW2, what’s wrong with learning lessons from the last war we won? You’d rather learn how not to do things from the wars we lost?

  • d. kellogg

    On key factor that seems consistently overlooked: since it is a projectile weapon that is NOT speed-of-light, it will be susceptible to aerodynamics and gravity.
    So to hit anything with useful accuracy, it will need onboard precision guidance and control mechanisms.

    It has taken considerable research, development, time, and money just to get reliable-enough guided projectiles for today’s chemical propellant guns that can withstand their launch stresses.
    But now all of a sudden, newest-and-best railgun technology emerges, and people are all “gee whiz” about it,
    forgetting the guns will STILL need launch-hardened guided shells to hit anything at considerably greater ranges than today’s propellant guns.
    What are those going to cost to even develop, let alone the per-round cost to field them?

  • hibeam

    Nice weapon but it looks to me like it could harm innocent civilians in Pakistan. So I have cancelled it. — Your Commander In Golf.

  • matt

    Understanding the tremendous effect of the impact at mach 4+, how much does that diminish with loss of speed? Talk of guidance and electronics is fun, but if the projectile has to slow to a certain point to be able to steer it, what do you have left in terms of kinetic energy? And as far as size, theres still a point of diminishing returns when it comes to payload in a projectile. If it can be guided it is going to be too slow to rely strictly on impact, it will need something inside to make it go boom.
    My solution…
    Build Navy ships with spots for tanks to be mounted. Let the tanks do the shooting, and when they get near land jettison for the ride up to the beach and on to victory!

    • Jeff

      I was in an Armor Battalion that did that during the Korean War. B Company, 1st/68th Armor. The only Armor or Cav Unit in the US Army with an Anchor on its crest.

  • Foamythedog

    I love the idea of shipboard flywheels- should make combat and evasive maneuvering interesting. Full left (or right) rudder, the ship turns, and the flywheel keeps going straight….right through the hull. Then again it might be cool in rough seas!

    • blight_

      I’ve not heard of flywheels in vibration-heavy environments…but there’s always a first?

    • Chuck

      The flywheels go on gymbals. Problem solved.

  • Rob C.

    The weapon still has away to go till it hits production. I hope they’ll be able to do it without losing the technology due to cyber theft. Chinese is managing to get rather similar weapons systems added to their arsenal or on their way their.

  • Tony C.

    The rail gun projectile traveling at high mach speed will deliver enough energy to explode on impact. There won’t be a need for an explosive warhead and this projectile could destroy the hull of an enemy warship on impact. The rail gun limitation is rate of fire, all else can be overcome with ships power generation.

  • Steve Z.

    Has anyone mentioned what the electro-magnetic pulses would have on the ships current electronics or the avionics in the aircraft, especially the navigation equipment!!!

  • Stu-Man_fu

    So how many billions are we trowing at this and paying for it by furloughing civilians?

  • David Drezner

    How will they power this? A one time chemical/electric system, or a nuclear power plant? The power requirements must be massive. With the same power you could probably power a pulse based laser system, which would mean we’d need a whole new class of railgun/laser platforms designed especially for electrical systems.

    I see a super-capacitor in their future, should we ever get one out of the laboratory.

    • Kevin Hale

      I think they are fielding electrical tech similar to super-capacitors + super conductive cables/wires. Also, it helps to know if the EM railgun has adapted to suit aerodynamic conditions to reduce drag as well as knowing how many alphas and charlies current sequences. Wonder what type of computer is determining targets and trajectories.

      As for energy storage, they might have fuel cell capacitor hybrids they can alternate in supplying and directing the weapon.

      This weapon seems more suited to base bombardment than most other weapons.

  • Brian B Mulholland

    My own inference, from the apparent importance assigned to rate of fire, is that the Navy is looking first at this system for major advances in point defense against incoming antiship missiles, including ballistic ones. Building a guided shell capable of surviving 60,000G launch accelerations is going to be difficult, but something that releases a shotshell of antimissile flechettes, or something similar, might be easier than building a munition meant to be guided after launch.

    David, what about the capacitors used in EMALS? We might not be that far away from that kind of power spike capacity.

  • Carl T. Steinmetz

    Much of what has been said here is the same things that were said about many advance in military tech. Having been in the Marine Corps for 20 years I found that advances in tech take time and money and do “Save Lives”! The Little-Boy is a great example. Yes, today people bitch about what it did to the people of Japan, but if we would have landed troops to take the main land it would have cost up to 1.5 million American lives and most likely have cost the Japanese 2-3 million dead and Many more injured.
    Yes it is expensive, but what is your son or daughter worth. As for more ships, well the truth is if you had 25-50 with the fire power of 2-3 rail guns you could cover most of the worlds hot spots, saving the need for aircraft and heavy ships to do the work. Look at it this way, the rounds (about 1000 pounds) from a 16 inch gun can take down a building at 25-30 miles and one shot (40-60 pounds) from a rail gun can do the job at 100 miles today and up to 400 miles in the near future. The stand off alone makes the ship safer, the light load means more can be carried on the ship and less chance of injuries with the explosive used to fire the 16 inch rounds.

  • Joe

    “Schematically you have two power rails that conduct electricity. We send a pulse onto one rail then connect the two rails. Magnetic force then pushes the projectile,” he explained.
    The EM Railgun needs large amounts of electrical power, some of which could be stored in batteries if the weapon were transported on a ship, he said.

    Nuclear power eliminates the need for batteries, and since some subs are powered that way why the hell can’t a few ships.

    The kinetic energy from one small projectile could sink a ship or devastate a bunker 50 or 60 feet below the ground surface. These weapons will set a new precedence in warfare.

  • All you have to do is drop a large heavy rock from orbit. Gravity will handle the rest massive explosion with no fallout.