You must log in or register to reply here. @RossPresser You want a compact, high velocity projectile to deliver a kinetic energy strike on a small spot. @PcMan right, silly mistake. In a plasma railgun, a short pulse of current is passed through a plasma located between two parallel electrodes, or "rails". @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. A sabot round arrangement (or just crushing the plate into a pellet) will allow you to concentrate much of this energy in a penetrator. That last issue was the real sticking point. What is a realistic maximum velocity of a coilgun round from a 100 m barrel? As plasma railguns are an open area of research, the method of armature formation varies. I WANT PLASMA WEAPONS!!!!! | Page 2 | SpaceBattles | FAQs @apaul34208 It depends on how the bullet is constructed and how "super" your supercapacitor is. Plasmas are used in many everyday objects such as fluorescent lights, but some of the physics of plasmas are still not entirely understood. The Navy even developed the ability to fire multiple-shot salvos but neither service has effectively fielded a weapon. 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 A tokamak is essentially an infinitely long rail/coil gun that produces a magnetic containment vessel for a super-heated plasma. The Air Force has been at this game for decades, though, and its previous work is more advanced than anything coming out of the Navy Department, Russia, China or even Kim Jong Uns wildest dreams. Linear railguns consist of two flat plate electrodes separated by insulating spacers and accelerate sheet armatures. Large boulders litter the forest floor below the rocky ridges creating habitat for snakes, porcupines and bobcats. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Lets imagine your projectile now has a SHC of more like 1kJ/KgK, and a melting point of 3000K. No hunting on the southern portion of the preserve (Warwick parcel). Read how we use cookies and how you can control them by visiting our Privacy Policy. @StarfishPrime obviously 100m barrel does not give 10 times faster than 10m barrel. | Final Year Projects for Engineering Students Can I use my Coinbase address to receive bitcoin? However, the, Very nice first post Ben M. We invite you to take our. I really do not understand the purpose of the 100m barrel, unless you are projecting a VERY big bullet. The railgun is mounted on a KF-40 vacuum port and operated using a 90 kA, 11 kV LC pulse forming network. A plasma railgun is a linear accelerator which, like a projectile railgun, uses two long parallel electrodes to accelerate a "sliding short" armature.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.Scientific plasma railguns are typically operated in vacuum and not at air pressure. Title VI Notice of Nondiscrimination 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. 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. One way to do this would be by using superconducting coils and heat them to drop the superconductivity (sometimes known as a quench gun) but that'll turn the field energy into heat, and lots of it. In what environment - vacuum, atmosphere, etc.? Engineering Project Ideas | The U.S. Navy and Air Force have both developed railgun prototypes. Checkout our latest projects and start learning for free. Which was the first Sci-Fi story to predict obnoxious "robo calls"? can be shaped into a bullet. Plasma is not necessarily hard to confine; for example, those of us who are old enough or who have an interest in the history of computing remember the beautiful Nixie tubes which were used for the displays of computers and calculators made until the 1980s or so; Nixie tubes can be ruggedized, and some have flown in space aboard Soviet (and maybe also American) spacecraft. Mobile Terms & Conditions Reportedly, Ruth asked a local handyman to clear out a spring on the side of Butterfield Hill to provide water for the animals in the woods this is still visible at the end of the first steep section of the preserves hiking trail. The intended use of this weapon is to have at least enough power to, Where does the version of Hamapil that is different from the Gemara come from? The Warwick Preserve was established when TNC received a 36-acre donation from Dr. Ruth Warwick and her daughter Louise Hunninen in 1964. Parking space for three to four vehicles is available,just South of a small white-railed bridge. Learn more about Stack Overflow the company, and our products. That's not bad at all. | Bulldog 4 Fun Run/Walk Railguns don't scale very well, due to the problem of the armature plasma cooking the rails. We'll give your coilgun an efficiency of 99.9%, and half the wastage goes to heating up the projectile again. projectiles up to 125 miles at 7.5 times the speed of sound, is 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. ETDs: Virginia Tech Electronic Theses and Dissertations, Requesting that Material be Amended or Removed. It was named MARAUDER or magnetically accelerated ring to achieve ultrahigh directed energy and radiation.. | Verify Certificate This thesis discusses the design and characterization of a small coaxial plasma railgun intended to accelerate argon-helium plasma jets. This page is not available in other languages. Modern Science generally acknowledges that a donut-shape is the best shape for containing Plasma. That's the best I could come up with, assuming he intended the plasma to cause damage. (10^10 gs, 1 s, etc). If we have a 200g projectile with the specific heat capacity of steel (500J/KgK) and the melting point of steel (say, 1800K) we can see that the projectile's temperature will raise by 1K for every 100J of wasted energy. rev2023.5.1.43405. Design and Characterization of a Coaxial Plasma Railgun for Jet This is actually a design for a true plasma weapon that fires a bolt of magnetically contained plasma. This means that railguns have scaling problems you can't shoot them too much before the rails need replacing, and the rail damage goes up with muzzle velocity so you may find a railgun that works just fine at 3km/s (at least for a little while) will be wrecked at 10km/s and explode violently at 30km/s. If your projectile is 20mm across and your barrel is 100m long, the amount of energy is the swept volume will be a reasonable 0.5GJ, for a muzzle velocity of 70km/s. Presumably the induction magnets would be the entire length of the barrel, so it can accelerate for longer. You should add citations for some of the claims being made. The rest can be found here: @JDugosz Thanks for calling that outthat was edited in by someone else, I fixed it. A round for standard infantry against nano-machined ceramics. Kinda important factors You might want to research fusion reactors. The plasma is confined between the bullet and the magnetic field pushing on it. Scientific plasma railguns are typically operated in vacuum and not at air pressure. [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. The Railgun - SP's Naval Forces Worldbuilding Stack Exchange is a question and answer site for writers/artists using science, geography and culture to construct imaginary worlds and settings. Outside hard vacuum, that 10000 km/s torus is not going anywhere. Something similar was tried in original Star Wars SDI, huge power load, completely useless in atmosphere. Non-superconducting projectiles will be subject to more heating!). 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. The Marauder uses the same principle in firing the weapon, but instead of the slug, Marauders projectile is superheated, donut-shaped ionized gas particles: plasma. If you believe that any material in VTechWorks should be removed, please see our policy and procedure for How could you make a cat's tail prehensile enough to use weapons? Dr. Coles died in the 1917 flu epidemic. A railgun is an electrically powered electromagnetic projectile launcher based on similar principles to the homopolar motor. Plasma, Coils, or both? :: Terra Invicta Gameplay Discussion In December 1998, TNC accepted a donation of 68 acres from Ann Fisher; this addition increased the size of the preserve to 104 acres. 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). Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? All takedown requests will be promptly acknowledged and investigated. | Robotics Online Classes for Kids by Playto Labs You can find instructions at https://www.whatismybrowser.com/guides/how-to-enable-cookies/auto. [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. Have bigger trouble hitting small target. Hand Held Coil Gun cannon - Enough to rip a giant robot limbs into pieces, Reimagined Weaponry: The Illidari Warglaives. Magneto-inertial fusion seeks to implode a magnetized D-T fusion target using a spherically-symmetric, collapsing, conducting liner. 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. Scientific plasma railguns are operated in a vacuum. A visit to the preserve in late spring or early summer will reveal some of these plants as well as neo-tropical migrant birds, including warbler and thrush species, and scarlet tanagers. Specific elements of the design are examined and the inherent physical and material difficulties of a coaxial design are explored. Which was the first Sci-Fi story to predict obnoxious "robo calls"? Plasma just doesn't last very long outside of carefully controlled scenarios. Gentle acceleration up to 100km/s over 100m doesn't have to liquidize your bullet. Could a mass-proportional physical speed limit on projectiles "nerf" guns but not ruin archery? Working backwards, this gives us a maximum kinetic energy of ~35MJ and so a maximum muzzle velocity of 18km/s, regardless of anything else about our gun. Thanks for detailed post Connor. Renewed interest has arisen in plasma armatures as evidenced by two papers presented at the 2008 EML Symposium. Better for close range brawling. Plasma railguns are categorized in two principle topologies, linear and coaxial where linear railguns consist of two flat plate electrodes separated by insulating spacers and accelerate sheet armatures and coaxial railguns accelerate toroidal plasma armatures using a hollow outer conductor and a central, concentric, inner conductor. Did the Golden Gate Bridge 'flatten' under the weight of 300,000 people in 1987? Developed by Phillips Laboratory. eject plasma at extremely high speeds (some plasma railguns are designed to fire projectiles, but testing has shown that solid armatures are more effective due to lower electrical resistances found in metals [4]). Obviously, your story, your hands to wave, but this stuff is important to remember if you want a hard-ish scifi setting. The relevant principle is: use a plasma to push on your bullet. The best answers are voted up and rise to the top, Not the answer you're looking for? What does 'They're at four. Little is known about it after 1993 because it swiftly Classified Status. Railgun | Project Wingman Wiki | Fandom Railgun has a charge time, but the projectile is very fast, so it's good for sniping. and our In the case of our hypothetical 200T coilgun, that gives us a maximum energy density of 16GJ/m3. 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.) Louise attended college, married and moved away. It was named "MARAUDER" - or "magnetically accelerated ring to achieve ultrahigh directed energy and radiation.". For a rough idea, you can use Luke Campbell's approximation for coilgun performance, which basically imagines the gun as a tube of energy in the form of the magnetic field, which is swept out by a projectile that turns it into kinetic energy. Agm is extremely professional we needed to expand our property to accommodate an RV and relieve a drainage problem next to our garage! Is it possible for a spheromak to maintain itself at high speeds under atmospheric conditions? If we magically start it off at 0K, we can see that it can absorb no more than 180kJ. Maybe the same function might be achieved some other way. -, magnetic fields to shield the interior of a gun barrels, AN ANALYTIC MODEL FOR THE COMPRESSION OF PLASMA TOROIDS. Scan this QR code to download the app now. Donations are tax-deductible as allowed by law. Notice that the barrel length is much shorter than the dreadnaughts of WW1 fame. Existing ground-based inertial confinement fusion pellets implode at ~300km/s, and are accelerated over a distance of a few mm (and this is far from the lab speed record). MARAUDER was a United States Air Force experiment to develop long-range plasma weapons. 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. A plasma railgun is a linear accelerator which, like a projectile railgun, uses two long parallel electrodes to accelerate a "sliding short" armature.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.Scientific plasma railguns are typically operated in vacuum and not at air pressure. Weighted sum of two random variables ranked by first order stochastic dominance. Like this page and invite your friends on Facebook. It's still an accelerating mass @RossPresser in general, because you can no longer rely on its intermolecular bonds to hold it together. Yeah, I never understood how you're supposed to get the plasma to stay plasma once you fire it. PS: I'd wager my whole tail that MARAUDER is an offshoot of the RACE torus experiments in late 80s. Is there such a thing as "right to be heard" by the authorities? What are your thoughts on the project MARAUDER plasma railgun? It was Motivated by RACE, though I don't know if that's enough to be an off shoot. A plasma-projectile shooting railgun is basically an armature that converts to plasma ('transitioning' armatures are also a thing and have been considered as a bridge between plasma armatures and solid/hybrid armature railguns, in fact) which is what Wikipedia describes (although the velocities are an order of magnitude less than what Shiva | MARAUDER, a U.S. government nuclear fusion research project Merauder, an American metalcore band Masked Marauder, a fictional Marvel Comics character Merrill's Marauders, United States commando unit in World War II This disambiguation page lists articles associated with the title Marauder.

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