Cookie Notice More or less a tiny flash as the projectile is destroyed? Plasma requires constant electrical energy input to be maintained, so storing your plasma bullets is the biggest constraint, barring some sort of Infinite Power Supply. 24 Apr 2013 | Posted by Member 30298028. This was the project's biggest issue. |. You cannot get anything better unless you use magical materials, or magical ultra-efficient coilguns (and this example is already quite magical). Come enjoy the rolling countryside 4 mile course, we are now celebrating our 20th annual event! The parcel was so important to the family that they permanently protected it by donating it to The Nature Conservancy in 1964. It only takes a minute to sign up. 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). | Contact Us, Copyright 2015-2018 Skyfi Education Labs Pvt. The glowing light is emitted by plasma.). And yes, the magnetic properties of metals tend to go to pot once they melt. 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. The trails are rugged and moderately steep, ascending from 480 feet of elevation to 900 feet in just the first third of a mile. Modern Science generally acknowledges that a donut-shape is the best shape for containing Plasma. The official Subreddit for the Isaac Arthur YouTube channel. 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Yet in scifi it is quite possible to have an uber plasma railgun that just kills missiles when they get too close. And a plasma bolt with a lifespan of a millisecond, moving at 10,000km/s has a range of 10km. The first thing we care about is efficiency our coilgun will inevitably cause the projectile to heat up as a result of induced currents, and if we heat it up to melting point the projectile will disintegrate making it much less useful as a weapon or worse: it'll explode, taking a chunk of your ship with it. If it breaks out by accident, even if it destroys everything would you still call it a 'weapon' ? What are the advantages of running a power tool on 240 V vs 120 V? 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. Click the Accept Cookie Policy button below to accept the use of cookies on your browser. In either design, a plasma armature is formed at the breech. Similar principles apply for plasma railguns. Marauder, marauders, The Marauder, or The Marauders may refer to: Language links are at the top of the page across from the title. We use cookies to offer you a better browsing experience. one report published just over a decade after, Marauder was the US militarys first plasma railgun and it might have worked. From Route 9 take Route 12 north for 6.4 miles, bringing you to east Westmoreland. Efficiency will drop, parasitic heat ratio will rise, and it will, @RossPresser focused engine plume will do thst without coilgun magic, enginr or alike fusion reactor. As plasma railguns are an open area of research, the method of armature formation varies. To recreate this in a bullet, you need: The idea here is that the bullet is fired not containing plasma, but everything needed to make plasma. It's a very slow particle beam in practice with ~8 millimeters of range in air if proton and ~10 if alpha particle. The experiment published in 1993 required the use of Kirtland Air Force Bases Shiva Star capacitor bank. No one has heard a thing about the program since 1995. Finally, you should see that I've been looking at coilguns, not railguns here. What are your thoughts on Project MARAUDER? Its rugged terrain includes the rushing waters of Partridge Brook and a mixed forest of hemlock, sugar maple, red oak, and basswood. Is "I didn't think it was serious" usually a good defence against "duty to rescue"? Privacy Policy. A minor scale definition: am I missing something? Sogive us a quarter of your tail then? Would this system work better in space? (Note that there will be other limits to projectile temperature superconducting projectiles musn't be heated above their critical temperature, for example, and that'll be a lot lower than their melting point: ~300K for a scifi "room temperature" superconductor, for example. Stay up-to-date and build projects on latest technologies, Blog | Coilguns don't have wear issues, as the projectile can be levitated in the barrel and be entirely non-contact and no arcing need occur. 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 Marauder uses the same principle in firing the weapon, but instead of the slug, Marauders projectile is superheated, donut-shaped ionized gas particles: plasma. The limit is 'cee' . Connect and share knowledge within a single location that is structured and easy to search. | Robotics Online Classes for Kids by Playto Labs Global sites represent either regional branches of The Nature Conservancy or local affiliates of The Nature Conservancy that are separate entities. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? @RossPresser You want a compact, high velocity projectile to deliver a kinetic energy strike on a small spot. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The post Marauder was the US militarys first plasma railgun and it might have worked appeared first on We Are The Mighty. Worldbuilding Stack Exchange is a question and answer site for writers/artists using science, geography and culture to construct imaginary worlds and settings. It's travelling at 1-3 percent the speed of light. Because the projectile was light-weight and magnetically strong, the prototype was able to accelerate a Compact Toroid of plasma at $10^{10}g$ (or about $98,100,000,000 m/s^2$). While the preserve is worth visiting throughout the year, there are icy conditions on the steeper sections of the trail during the winter so make sure to bring appropriate gear or wait for the warmer seasons to enjoy the trails. A railgun comprises a pair of parallel conducting rails, along which a sliding armature is accelerated by the electromagnetic effects of a current that flows down one rail, into the armature and then back along the other rail. rev2023.5.1.43405. Controlled jets from plasma rail guns can have peak densities in the 1013 to 1016 particles/m3 range, and velocities from 5 to 200 km/s, depending on device design configuration and operating parameters, and the upper limits may be higher. 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. Get kits shipped in 24 hours. MARAUDER was a United States Air Force experiment to develop long-range plasma weapons. don't forget we're getting 5 pounds of TNT yield out of a MILIGRAMS of material. Requesting that Material be Amended or Removed. Generating points along line with specifying the origin of point generation in QGIS. MARAUDER estimated that by the year 2000, they could increase the shot velocity to $10,000km/s$. 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. How could dragons effectively use their wings as weapons in ground combat? Scientific plasma railguns are typically operated in vacuum and not at air pressure. That said, this would require a much bigger power source, that would sustain for a longer acceleration. After armature formation, the plasmoid is then accelerated down the length of the railgun by a current pulse driven through one electrode, through the armature, and out the other electrode, creating a large magnetic field behind the armature. Have bigger trouble hitting small target. The maximum force you can exert is the yield strength, which might be 1GPa; with this pressure over 100m, you get 100GJ/m^2 of energy transfer, and with a low-areal-density 1kg/m^2 bullet, about 400km/s. It is generally believed that MARAUDER was eventually scrapped. The Warwick Preserve was established when TNC received a 36-acre donation from Dr. Ruth Warwick and her daughter Louise Hunninen in 1964. The relevant principle is: use a plasma to push on your bullet. | Technical Resources What is Wario dropping at the end of Super Mario Land 2 and why? BATH, Maine The U.S. Navy has pulled the plug, for now, on a futuristic weapon that fires projectiles at up to seven times the speed of sound using electricity. the railgun can launch projectiles much farther than the 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. Mostly realistic weapons to assault a planet from orbit. No hunting on the southern portion of the preserve (Warwick parcel). 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. It will just ablate a thin layer of it. 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. Description. Some handwaving of high-capacity, high-voltage, extremely compact and inexpensive supercapacitors will be needed. You must log in or register to reply here. | Verify Certificate The leader is undoubtedly the Chinese army. or 8,654 km/hr. Randy Curry and his friends were able to fire a self-contained ring of plasma in open air, that lasted for 10 milliseconds. Project MARAUDER Developed by Phillips Laboratory. JavaScript is disabled for your browser. In a plasma railgun, a voltage is applied so that current can flow through the flat rail electrodes. If technology was developed to fix this it might affect the acceleration speed. Naturally, in science fiction it would be very easy to explain that scientists discovered a more stable Toroidial configuration that lastswellhowever long you need it to last for the sake of the story. Has the Melford Hall manuscript poem "Whoso terms love a fire" been attributed to any poetDonne, Roe, or other? Still not quite good enough for the satellite-based weapon that MARAUDER was meant to bebut pretty solid for ground-based combat. That's not bad at all. Re-arranging F=ma, you get a=F/m, no mention of distance. 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. We use cookies to offer you a better browsing experience. Enter your email address and we will send you instructions to reset your password if there is an account for that email. 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. That speed makes it about 2,394 m/s. 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. Yes, Shiva Star, that was the '80es project I was thinking about. You can learn from experts, build working projects, showcase skills to the world and grab the best jobs. How many gs could a coilgun or railgun shell withstand? 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. Glass, perhaps jacketed in something more durable like ceramic, could contain the plasma apparatus. They are of value because they produce muzzle velocities of up to several hundreds of kilometers per second. In 1964, the Warwick Preserve was the first New Hampshire property donated to The Nature Conservancy. @StarfishPrime obviously 100m barrel does not give 10 times faster than 10m barrel. Similar principles apply for plasma railguns. Developed by Phillips Laboratory. A railgun is an electrically powered electromagnetic projectile launcher based on similar principles to the homopolar motor. This set up is not feasible with current technology, as most railgun power sources can only operate barely long enough to fire the projectile. Say, if the primary problem of MARAUDER is that a plasma Torus will quickly become ineffective in the atmosphere, wouldn't that make a perfect weapon to put on a Satellite? While currently, there are bans on orbital anti-ICBM weaponry, a MARAUDER-armed satellite could probably be an extremely effective Anti-ICBM weapon. Coaxial accelerators require insulators only at the breech, but the plasma armature in that case is subject to the "blow-by" instability. 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. Rank amateurs. The maximum force you can exert is the yield strength, which might be . 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. Other than that, you're essentially constructing bullet-sized fluorescent tubes with some sort of attached supercapacitor that can provide ionization voltages for ~10s. Plasma just doesn't last very long outside of carefully controlled scenarios. It was Motivated by RACE, though I don't know if that's enough to be an off shoot. Plasma railguns are capable of producing controlled jets of given densities and velocities ranging from at least peak densities 1e13 to 1e16 particles/m^3 with velocities from 5 to 200 km/s dependent on device design configuration and operating parameters. However, techniques including exploding foils, gas cell burst disk injection, neutral gas injection via fast gas valve, and plasma capillary injection have been employed. Donations are tax-deductible as allowed by law. Youve already signed up with this email address. Railguns give you much more oomph for the same length barrel, but unfortunately shooting them causes damage to the rails as a result of the super-hot plasma arc that forms behind the projectile.
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