Helical railguns[1] are multi-turn railguns that reduce rail and brush current by a factor equal to the number of turns. Two rails are surrounded by a helical barrel and the projectile or re-usable carrier is cylindrical. The projectile is energized continuously by two brushes sliding along the rails, and two or more additional brushes on the projectile serve to energize and commute several windings of the helical barrel direction in front of and/or behind the projectile. The helical railgun is a cross between a railgun and a coilgun. They do not currently exist in a practical, usable form.
The helical railgun is theoretically the most energy efficient railgun design[2]
A helical railgun was built at MIT in 1980 and was powered by several banks of, for the time, large capacitors (approximately 4 farads). It was about 3 meters long, consisting of 2 meters of accelerating coil and 1 meter of decelerating coil. It was able to launch a glider or projectile about 500 meters.[3]
In 2007, a solid-projectile helical-coil electromagnetic launcher was successfully built and tested at the University of Missouri-Columbia. The design used a straight power rail, and a helical stator coil in the barrel and an armature coil inside the projectile. One brush mounted on the projectile conducted the current from the straight power rail into the projectile, and two more brushes on the projectile conducted the current into a segment of the helical coil near the front of the projectile. This segment of the coil creates a magnetic field which attracts the armature coil, which in turn pulls the projectile forwards. This movement moves the brushes mounted on the projectile forwards which prevents the armature coil from ever reaching the segment of helical coil pulling it. The device was powered by a capacitive-circuit which stored upto 125 kJ in energy, and achieved 35.1 m/s muzzle velocity.[2]
^Baum, Carl E. (26 December 2007). "Some Electromagnetic Considerations for Design of Railgun Electromagnetic Projectile Launchers" (PDF). UNM Electrical and Computer Engineering. (PDF) from the original on 19 April 2017. Retrieved 17 November 2022.
^ abEngel, T.G. (17–22 June 2007). "Solid-Projectile Helical Coil Electromagnetic Launcher" (PDF). 2007 IEEE 34th International Conference on Plasma Science (ICOPS). pp. 1789–1792. doi:10.1109/PPPS.2007.4346319. ISBN978-1-4244-0915-0. S2CID 12419490. Retrieved 18 January 2024.
^Kolm, H.; et al. (1980). "Electromagnetic Guns, Launchers, and Reaction Engines". 2nd International Pulsed Power Conference. Massachusetts Institute of Technology: 42. Bibcode:1979pupo.conf...42K.
This article related to weaponry is a stub. You can help Wikipedia by expanding it.
helical, railgun, multi, turn, railguns, that, reduce, rail, brush, current, factor, equal, number, turns, rails, surrounded, helical, barrel, projectile, usable, carrier, cylindrical, projectile, energized, continuously, brushes, sliding, along, rails, more, . Helical railguns 1 are multi turn railguns that reduce rail and brush current by a factor equal to the number of turns Two rails are surrounded by a helical barrel and the projectile or re usable carrier is cylindrical The projectile is energized continuously by two brushes sliding along the rails and two or more additional brushes on the projectile serve to energize and commute several windings of the helical barrel direction in front of and or behind the projectile The helical railgun is a cross between a railgun and a coilgun They do not currently exist in a practical usable form The helical railgun is theoretically the most energy efficient railgun design 2 A helical railgun was built at MIT in 1980 and was powered by several banks of for the time large capacitors approximately 4 farads It was about 3 meters long consisting of 2 meters of accelerating coil and 1 meter of decelerating coil It was able to launch a glider or projectile about 500 meters 3 In 2007 a solid projectile helical coil electromagnetic launcher was successfully built and tested at the University of Missouri Columbia The design used a straight power rail and a helical stator coil in the barrel and an armature coil inside the projectile One brush mounted on the projectile conducted the current from the straight power rail into the projectile and two more brushes on the projectile conducted the current into a segment of the helical coil near the front of the projectile This segment of the coil creates a magnetic field which attracts the armature coil which in turn pulls the projectile forwards This movement moves the brushes mounted on the projectile forwards which prevents the armature coil from ever reaching the segment of helical coil pulling it The device was powered by a capacitive circuit which stored upto 125 kJ in energy and achieved 35 1 m s muzzle velocity 2 See also editRailgun Plasma railgun Coilgun Mass driver Ram accelerator Light gas gun Electrothermal chemical technology Henry KolmReferences edit Baum Carl E 26 December 2007 Some Electromagnetic Considerations for Design of Railgun Electromagnetic Projectile Launchers PDF UNM Electrical and Computer Engineering Archived PDF from the original on 19 April 2017 Retrieved 17 November 2022 a b Engel T G 17 22 June 2007 Solid Projectile Helical Coil Electromagnetic Launcher PDF 2007 IEEE 34th International Conference on Plasma Science ICOPS pp 1789 1792 doi 10 1109 PPPS 2007 4346319 ISBN 978 1 4244 0915 0 S2CID 12419490 Retrieved 18 January 2024 Kolm H et al 1980 Electromagnetic Guns Launchers and Reaction Engines 2nd International Pulsed Power Conference Massachusetts Institute of Technology 42 Bibcode 1979pupo conf 42K nbsp This article related to weaponry is a stub You can help Wikipedia by expanding it vte nbsp This article relating to artillery is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Helical railgun amp oldid 1197246182, wikipedia, wiki, book, books, library,
