Experimental Results From a Two-Turn 40 mm Railgun

Watt, T.; Crawford, M.

doi:10.1109/elt.2008.43

Cited by 10 publications

(3 citation statements)

References 14 publications

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“…The two-turn geometry was validated using the existing medium-caliber launcher (MCL) system in a 40 mm squarebore configuration [2]. A launch package configuration was developed that included two separate armatures that accelerated a common steel payload (Fig.…”

Section: A Twoturn Subscale Validationsmentioning

confidence: 99%

The Design and Testing of a Large-Caliber Railgun

Crawford¹,

Subramanian²,

Watt³

et al. 2008

2008 14th Symposium on Electromagnetic Launch Technology

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A large-caliber railgun was developed to demonstrate the supersonic launch of 120 mm projectiles. A trade study that evaluated over 70 different railgun configurations and geometries resulted in the selection of a high-inductance-gradient, multi-turn configuration as the best overall choice. Subscale tests were performed on both the railgun and launch package configurations. A full-scale laboratory system was installed that included a dedicated high-current, large-caliber breech and gunline. A full-scale launcher was successfully tested to beyond the design conditions. This paper will describe the trade study and overall experimental program that included the subscale testing and full-scale design and experimental results. Keywords-component; railgun; high inductance gradient, large caliber978-1-4244-1833-6/08/$25.00 ©2008 IEEE

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Section: A Twoturn Subscale Validationsmentioning

confidence: 99%

The Design and Testing of a Large-Caliber Railgun

Crawford¹,

Subramanian²,

Watt³

et al. 2008

2008 14th Symposium on Electromagnetic Launch Technology

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“…In order to improve the launching efficiency of electromagnetic railgun, researchers have taken many measures, such as using multi-turn enhanced railgun, additional magnetic field enhanced railgun and so on. Watt et al carried out experimental research on two kinds of enhanced launchers with stacked guide rails, and analyzed the muzzle voltage, velocity and rail surface state [5] . Coffe et al used Ps-pice model to optimize the current loop of the enhanced electromagnetic rail launcher [6] .…”

Section: Introductionmentioning

confidence: 99%

A magnetic field constrained type of multi-barrel common-rail railgun

Guo

Zhang

et al. 2023

J. Phys.: Conf. Ser.

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Adopting the simultaneous launch mode of small and medium caliber railgun is an important means to increase the firepower density, improve the hit probability and strike efficiency. Based on this requirement, this paper creatively proposed a new multi-barrel simultaneous launch EM railgun, named magnetic field constrained type of multi-barrel common-rail railgun. The basic idea is to integrate multiple single-turn rail launchers with a specific structure into one launcher, and “merge” one rail of each single-turn rail launcher with a tight structure combination and arrange it in the center to form the “common rail” of multi-barrel launcher. The other rail of each rail launcher is evenly distributed around the “common rail” in the form of petals, forming the “outer rail” of each rail launcher. “Common rail” and all “outer rails” together form a multi-barrel rail launcher. With the increase of the number of barrels, the current of each barrel is superimposed many times in the common-rail, which greatly improves the magnetic induction intensity of the inner bore, thus improving the launching efficiency of the system. In order to overcome the problem of high magnetic induction intensity near the common-rail and low magnetic induction intensity near the external rail caused, a magnetic field constrained structure is added to the external rail to form a magnetic field constrained type of multi-barrel common-rail railgun. The basic structure of electromagnetic railgun with different number of barrels is simulated, and the spatial distribution characteristics of magnetic field are analyzed. Based on the magnetic field analysis, the interior ballistic simulation of the multi-barrel common-rail railgun is carried out, and the interior ballistic characteristics and launching efficiency of various numbers of barrels are analyzed. The simulation results show that the magnetic field constrained type of multi-barrel common-rail railgun can effectively improve the magnetic induction intensity near the external rail, improve the uniformity of the magnetic induction intensity distribution in the inner bore, and improve the inductance gradient, thus increasing the system efficiency. The structure of the multi-barrel common-rail railgun provides a new idea for the engineering application of the multi-barrel simultaneous launch mode.

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“…In this paper, according to the configuration of doubleprojectile in [8], we proposed a triple-projectile railgun, which has three rail pairs stacked so that each rail pair is facing the bore, each having its own projectile [4] [5], as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Salvo performance analysis of triple-projectile railgun

Zhang

Liu

Liao

et al. 2012

2012 16th International Symposium on Electromagnetic Launch Technology

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The triple-projectile railgun can launch three projectiles per fire. The rail pairs are stacked so that each rail pair is facing the bore, each having its own projectile. In order to analyze its salvo performance, we investigate the self-inductance gradient (L') and mutual-inductance gradient (M') of each rail pair through a 3-D electromagnetic finite-element analysis (FEA). The results show that the mutual-inductance gradients of the three rail pairs are different (M 1 ' ≠ M 2 ' ≠ M 3 ') when the three armatures are at different positions. Subsequent circuit simulation of the launching process shows that the force acting on the front armature is less than that on the rear armature. We discover that the configuration of the railgun will facilitate the synchronization during the launching process. To validate the results of simulation, a triple-projectile railgun one meter in length is built. It provides a basis for the design of multi-projectile railgun.

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Experimental Results From a Two-Turn 40 mm Railgun

Cited by 10 publications

References 14 publications

The Design and Testing of a Large-Caliber Railgun

The Design and Testing of a Large-Caliber Railgun

A magnetic field constrained type of multi-barrel common-rail railgun

Salvo performance analysis of triple-projectile railgun

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