|. In coaxial plasma railguns, the electrodes are concentric. Railgun technology, which uses electromagnetic force to send I'm interested to know what is the maximum realistic muzzle velocity of a coilgun with a 100m barrel length. Now THERE is a coil gun. Lets say that our coilgun is 99% efficient, and of the 1% of the energy that it wastes, half of it goes into the projectile. Requesting that Material be Amended or Removed. | Summer Training Programs The plasma is accelerated until it leaves the muzzle of the railgun. Randy Curry and his friends were able to fire a self-contained ring of plasma in open air, that lasted for 10 milliseconds. Hand Held Coil Gun cannon - Enough to rip a giant robot limbs into pieces, Reimagined Weaponry: The Illidari Warglaives. Obviously, your story, your hands to wave, but this stuff is important to remember if you want a hard-ish scifi setting. However, in a plasma railgun, the armature and ejected projectile consists of plasma, or hot, ionised, gas-like particles, instead of a solid slug of material. We can now have a maximum muzzle energy of more like 1.2GJ, which for a 200g round gives us a muzzle velocity of nearly 110km/s. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Your browser has JavaScript disabled. However, in recent years, new research has shown promise in extending the lifespan of these Toroids. This paper discusses the design and testing of a small, relatively low power coaxial plasma railgun. JavaScript is disabled for your browser. Plasma is good against EVERYTHING - Hull AND shield - with big damage (with few exception), but since the travel time is slow, effective range is poor. Similar principles apply for plasma railguns. Better for close range brawling. However, techniques including exploding foils, gas cell burst disk injection, neutral gas injection via fast gas valve, and plasma capillary injection have been employed. As plasma railguns are an open area of research, the method of armature formation varies. That's the best I could come up with, assuming he intended the plasma to cause damage. Its no secret the United States has been working on effective rail gun technology for years. projectiles up to 125 miles at 7.5 times the speed of sound, is He describes two promising approaches which are based on demonstrated technology. A minor scale definition: am I missing something? The Bulldog 4 is an annual fun run that also serves as a fundraiser for the Westmoreland PTA. Plasma railguns are being evaluated as a possible method of implosion linear formation for fusion. The United States is playing catch up in this area of weapons development at least it is in public. Privacy Statement @RossPresser but really what will happen is that if your gun pumps enough eneergy into the round to melt it, it'll almost certainly pump enough energy into it to at least partially boil it, and it'll go bang. | FAQs Donations are tax-deductible as allowed by law. 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A bigger projectile won't help you; you need one with a higher melting point, a larger heat capacity, and a more efficient coilgun to get the speeds you want. Since the driver current through the armature is also moving through and normal to a self-generated magnetic field, the armature particles experience a Lorentz force, accelerating them down the length of the gun. Re-arranging F=ma, you get a=F/m, no mention of distance. Your question/message has been sent to the race director. | Robotics Online Classes for Kids by Playto Labs You can assume that any figures this gives are over-optimistic, but it isn't a bad upper-bound for coilgun performance. Because even with those insane speeds, their 'Plasma Bolt' didn't live long enough to achieve a useful range ($3,000 km/s \times 1 \mu s = 3m$). What is this brick with a round back and a stud on the side used for? Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? or 8,654 km/hr. Railgun has a charge time, but the projectile is very fast, so it's good for sniping. Scientific plasma railguns are operated in a vacuum. Which means that I am in the potentially unique situation of being able to tell you that yes, they went out of their way to name it Marauder because it took us far too long to find a word that worked, we spent two hours fiddling with syllables to get stuff that fit (Direct Energy Railgun gives der). It's still an accelerating mass @RossPresser in general, because you can no longer rely on its intermolecular bonds to hold it together. That speed makes it about 2,394 m/s. The U.S. Air Force Research Laboratory must have made some significant progress in a short time, because computer simulations started in 1991, an experiment was conducted in 1993, and the whole thing was classified not long after. Simply put, its not exactly mobile enough to use in ground combat. Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. don't forget we're getting 5 pounds of TNT yield out of a MILIGRAMS of material. What're the weight and dimensions of the slug? @KareemElashmawy The vast bulk of what I said can be found in the wiki article I linked at the very start of the post. If the shooting stars and the stuff hits the fan, Uncle Sam might pull the Marauder out of mothballs. Does it have to specifically contain plasma? The limit is 'cee' . Ultimately, the limit is going to be keeping the bullet solid as you push on it. [citation needed] Plasma rail guns are being evaluated for applications in magnetic confinement fusion for disruption mitigation and tokamak refueling. The design of individual gun components is detailed. The railgun has less ammo, but a little higher damage and (correct me if I'm wrong) it's better to shoot out subsystems. Why are players required to record the moves in World Championship Classical games? | Privacy Policy The experiment published in 1993 required the use of Kirtland Air Force Bases Shiva Star capacitor bank. Coaxial railguns accelerate toroidal plasma armatures using a hollow outer conductor and a central, concentric, inner conductor. This creates your localized heat for as long as the arc can be maintained, greatly weakening or destroying the material at the point of impact. It seems like a really cool concept. You should add citations for some of the claims being made. Plasma railguns are being evaluated as a possible method of implosion linear formation for fusion. If you still see this message after clicking the link, then your browser settings are likely set to not allow cookies. The Navy even developed the ability to fire multiple-shot salvos but neither service has effectively fielded a weapon. Little is known about it after 1993 because it swiftly Classified Status. But the OP specifically asked for "plasma contained in bullets". The post Marauder was the US militarys first plasma railgun and it might have worked appeared first on We Are The Mighty. Renewed interest has arisen in plasma armatures as evidenced by two papers presented at the 2008 EML Symposium. A YouTuber by the name of NSA_Listbot has created a railgun that shoots plasma rounds and they were strong enough to fully penetrate a cantaloupe. Did you mean to type Which reverse polarity protection is better and why? Other than that, you're essentially constructing bullet-sized fluorescent tubes with some sort of attached supercapacitor that can provide ionization voltages for ~10s. Scientific plasma railguns are typically operated in vacuum and not at air pressure. @apaul34208 It depends on how the bullet is constructed and how "super" your supercapacitor is. In the case of our hypothetical 200T coilgun, that gives us a maximum energy density of 16GJ/m3. The magic number of interest here is the energy density that the swept volume can have this is $\frac{1}{2\mu_o}$ (where 0 is the permeability of free space) or about 400kJ/m3/T2, multiplied by the square of the magnetic field strength. What is a realistic maximum velocity of a coilgun round from a 100 m barrel? This current generates a magnetic field which propels the plasma forward. The electrode strikes a plasma arc to the target, creating a conductive path and emptying the capacitor into the target. Plasma gets more electrically conductive as it heats up, and your bullet stays in the barrel so little time, the plasma won't conduct much heat to the bullet. Where does the version of Hamapil that is different from the Gemara come from? Please try enabling cookies. Honestly I find it hard to envision how a weaponized, long range railgun would make a 'torus' (that seems more a thing to do with coilgun style propulsion - some modesl literally do involve configurations to accelerate/propel ring shaped projectiles.) However, in a plasma railgun, the armature and ejected projectile consists of plasma, or hot, ionised, gas-like particles, instead of a solid slug of material. However, it is rumored to be a coil gun, not a rail gun. MARAUDER was a United States Air Force experiment to develop long-range plasma weapons. Registration ends May 5, 2023 at 9:00pm EDT, https://www.whatismybrowser.com/guides/how-to-enable-cookies/auto. However, in a plasma railgun, the armature and ejected projectile consists of plasma, or hot, ionized, gas-like particles, instead of a solid slug of material. Yet in scifi it is quite possible to have an uber plasma railgun that just kills missiles when they get too close. Their design for plasma containment is called a Compact Toroid, and their design was similar to an arrangement called a Spheromak. Has the Melford Hall manuscript poem "Whoso terms love a fire" been attributed to any poetDonne, Roe, or other? While currently, there are bans on orbital anti-ICBM weaponry, a MARAUDER-armed satellite could probably be an extremely effective Anti-ICBM weapon. Wouldn't this approach only create plasma for a tiny fraction of a second? I still see them. They work a lot like a Smoke Ring does. Of course, you could do much better than a puny 400km/s with a laser-pushed ablator because you can maintain the acceleration till you hit the target. Is it possible for a spheromak to maintain itself at high speeds under atmospheric conditions? Magneto-inertial fusion seeks to implode a magnetized D-T fusion target using a spherically-symmetric, collapsing, conducting liner. There are possibly other things you might be able to do, like packing your projectile in some kind of coolant that is melted and evaporated to cool the projectile as it is accelerated. It may not display this or other websites correctly. Mostly realistic weapons to assault a planet from orbit. Jet velocity and density are characterized by analyzing diagnostic data collected from a Rogowski coil, interferometer, and photodiode. However, techniques including exploding foils, gas cell burst disk injection, neutral gas injection through a fast gas valve, and plasma capillary injection have been employed. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Worldbuilding Stack Exchange is a question and answer site for writers/artists using science, geography and culture to construct imaginary worlds and settings. Linear plasma railguns place extreme demands on their insulators, as they must be an electrically insulating, plasma-facing vacuum component which can withstand both thermal and acoustic shocks. The parcel was so important to the family that they permanently protected it by donating it to The Nature Conservancy in 1964. This current generates a magnetic field which propels the plasma forward. Simple deform modifier is deforming my object. and our | Verify Certificate All proceeds help support the Westmoreland PTA and their great programming for the students and teachers of Westmoreland! With a 10 meter barrel, we get about 2500 meters per second. The intended use of this weapon is to have at least enough power to, Would this be at all practical as a weapon system? Where the electromagnetic railgun fires a projectile at supersonic speeds of up to Mach 6, the Marauder would fire its one-meter diameter plasma rounds at 10,000 kilometers per second, or 3% of the speed of light. Youve already signed up with this email address. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The maximum force you can exert is the yield strength, which might be . These are laser powered, and the shock waves due to the sudden acceleration heat the pellet substantially before it hits the center. | Playto Is "I didn't think it was serious" usually a good defence against "duty to rescue"? What are the advantages of running a power tool on 240 V vs 120 V? Most don't need TeX formatting at all, if you know how to type. It was named MARAUDER or magnetically accelerated ring to achieve ultrahigh directed energy and radiation.. can be shaped into a bullet. Railguns are just high velocity rounds so standard plus extra defenses will work. Which was the first Sci-Fi story to predict obnoxious "robo calls"? your coils are now bigger, and higher power, and need more current to reach the same strength. So a 100 meter barrel would have a speed of about 7900 meters per second. More or less a tiny flash as the projectile is destroyed? Why don't we use the 7805 for car phone chargers? This may help a bit, but does impose some parasitic mass that will limit the muzzle velocity of the projectile (and makes calculation of the final velocity into some kind of horrid differential equation which I won't be solving for you). Sogive us a quarter of your tail then? | Mini Projects for Engineering Students Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Mount Vernon High School (Fortville, Indiana), https://en.wikipedia.org/w/index.php?title=Marauder&oldid=1131569989, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License 3.0, "The Marauders", a 1983 song by Tears for Fears, B-side to ", Marauders, synthetic creatures derived from, This page was last edited on 4 January 2023, at 19:22. Project MARAUDER Developed by Phillips Laboratory. Please wait while we submit your question/message. Its rugged terrain includes the rushing waters of Partridge Brook and a mixed forest of hemlock, sugar maple, red oak, and basswood. In what environment - vacuum, atmosphere, etc.? No one has heard a thing about the program since 1995. Yet in a constant high acceleration starship setting.. plasma railguns are best used for defense, since a swarm of high thrust constant acceleration missiles could in theory overwhelm it's firing solution. You can enrol with friends and receive kits at your doorstep. | The power requirement appears to be immense. However, the, Very nice first post Ben M. We invite you to take our. Generating points along line with specifying the origin of point generation in QGIS. [citation needed], High velocity jets of controllable density and temperature allow astrophysical phenomena such as solar wind, galactic jets, solar events and astrophysical plasma to be partially simulated in the laboratory and measured directly, in addition to astronomic and satellite observations. Can my creature spell be countered if I cast a split second spell after it? While Vladimir Putin is busy touting Russias newest line of hypersonic weapons he is seemingly whipping the world into a frenzy about missiles flying past early warning systems. And a plasma bolt with a lifespan of a millisecond, moving at 10,000km/s has a range of 10km. Connect and share knowledge within a single location that is structured and easy to search. Reddit and its partners use cookies and similar technologies to provide you with a better experience. View Directions ;). Basically, the Marauder was everything an army could possibly hope for in the area of field artillery: an ultra-fast, super-destructive gun whose ammunition was only limited to how much power the army could produce for it. TIL Project MARAUDER, a coaxial plasma railgun powered by the SHIVA STAR capacitor bank, was designed by the USAF and capable of " [producing] doughnut shaped rings of plasma and balls of lightning that exploded with devastating effects when hitting its target." It was classified in 1993. en.wikipedia.org 540 30 comments Add a Comment In either design, a plasma armature is formed at the breech. The glowing light is emitted by plasma.). We'll give your coilgun an efficiency of 99.9%, and half the wastage goes to heating up the projectile again. Plasma railguns are being evaluated for applications in magnetic confinement fusion for disruption mitigation and tokamak refueling. In December 1998, TNC accepted a donation of 68 acres from Ann Fisher; this addition increased the size of the preserve to 104 acres. Read how we use cookies and how you can control them by visiting our Privacy Policy. As fascinating of a topic as the research may be, the more important question is whether they went out of their way to make the project acronym marauder, or if it was just a fortunate coincidence that it ended up as that? This is an instability in which the magnetic pressure front can out-run or "blow-by" the plasma armature due to the radial dependence of acceleration current density, drastically reducing device efficiency. Privacy Policy. If you continue to use this site, you consent to use all cookies. Please enable JavaScript if possible. [1], Magneto-inertial fusion seeks to implode a magnetized D-T fusion target using a spherically symmetric, collapsing, conducting liner. [duplicate], fire a self-contained ring of plasma in open air, Picture of a historical neon discharge tube, Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Round is a solid KE penetrator. To produce plasma-cutter-like effects on armored vehicles, which I assume is the goal, is slightly different, as the plasma in the above bullet won't last very long after the bullet impacts and the power source is (presumably) destroyed. In a plasma railgun, the armature and ejected projectile consist of hot, ionized, gas-like particles heated by a very high temperature. We're still messing with the specifics of the donut (how tall is it, how wide is it, how big is the hole, how much plasma do we shove in, how hot should the plasma be, etc), but the basic consensus is that Toroids are the ideal shape for a self-sustaining plasma bolt. Forty-foot high rocky outcrops provide views of the river. Why did US v. Assange skip the court of appeal? A bigger projectile yields a higher payload, so a rifle-mounted tank buster could be devised. Have bigger trouble hitting small target. To review your email preferences, please visit nature.org/emailpreferences. Railguns, sometimes called mass drivers, are kinetic energy weapons used extensively in the After Calamity Era. ETDs: Virginia Tech Electronic Theses and Dissertations, Requesting that Material be Amended or Removed. A 30mm projectile would let you fit your 100km/s gun into the original 100m length limit, but: You could use a fat, low-density sabot which drives a thin dense projectile, but the sabot represents parasitic weight that eats into the kinetic-energy budget of the narrow penetrator. one report published just over a decade after, Marauder was the US militarys first plasma railgun and it might have worked. A 100m railgun might not, in fact, be 10 times faster than a 10m railgun, if it wanted to stay in one piece after firing. In 1964, the Warwick Preserve was the first New Hampshire property donated to The Nature Conservancy. MARAUDER took these Compact Toroids and fired them from a railgun. Beneath that you have fabric mesh surrounding the vehicle's inner hull that is tear resistant and some sort of self repair that will auto-fill any hole that is made. What's wrong with accelerating a metal slug beyond its melting point? After observing an extensive clear-cutting operation on Butterfield Hill near their home, Ruth urged George to acquire the 36-acre parcel to preserve the beautifully wooded section of the hill. The resulting projectile moved at $3,000 km/s$ and struck its target with a $\approx 5$ lb TNT explosion ($5 \times 10^{-7} kT = 2.092MJ$) ---and a potent, short-range electromagnetic pulse. We don't know if it ever went anywhere. Read how we use cookies and how you can control them by visiting our Privacy Policy. It is noted that conventional plasma armature railguns are limited to velocities of 6-8 km/s by arc restrike. Mr. Parsons was a perfectionist in his plans he and his crew have done our lawn maintenance for the past 3 years and it looks awesome. Its the same lab used to produce energy enough for the SDI initiative (also known as Star Wars missile defense).