NDLI: Ultra-stiff, low mass, electromagnetic gun design

Content Provider	IEEE Xplore Digital Library
Author	Werst, M.D. Kitzmiller, J.R. Hearn, C.S. Wedeking, G.A.
Copyright Year	1965
Abstract	High performance in an electromagnetic (EM) gun implies high velocity with minimal transition from a solid to plasma armature. Factors that affect gun performance include armature integrity, bore straightness, and bore stiffness. Experiences firing solid armature at the Center for Electromechanics at The University of Texas at Austin since 1987 have shown that the lack of one or more of these three ingredients will result in less than desirable performance. This work presents a simple, ultra-stiff and low mass EM gun design that provides five to six times the rail-to-rail structural stiffness than a conventional bolted, composite sidewall-type EM gun construction. This translates into minimal bore deflection which lessens the amount the armature must distort to maintain a low voltage contact with the rails. The EM gun design incorporates a passive preloading mechanism that maintains a compressive stress state in the bore components without the use of hydraulics. Bore preload is provided that exceeds the maximum rail-to-rail EM loads and is reacted by a composite structure that also provides longitudinal barrel stiffness. Manufacturing techniques are presented that would allow the design to be built on a small or large scale using standard manufacturing tolerances and demonstrated assembly processes. Material selection and impact on the ability to actively cool a railgun is also presented.
Sponsorship	IEEE Magnetics Society
Starting Page	262
Ending Page	265
Page Count	4
File Size	644225
File Format	PDF
ISSN	00189464
Volume Number	41
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Boring Solids Manufacturing processes Plasmas Low voltage Rails Compressive stress Large-scale systems Assembly Railguns railgun Armature design bore stiffness electromagnetic launcher EM gun
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Ultra-stiff, low mass, EM gun design

Design and testing of a rapid fire, lightweight, ultra stiff railgun for a cannon caliber electromagnetic launcher system

Investigation of Damage to Solid-Armature Railguns at Startup

Structure Design of an "Open-Bore" Electromagnetic Launcher

Effect of Armature and Rails Resistivity Profile on Rail’s Electromagnetic Force and Armature Velocity

Stiff railguns

New solid armature design concept (for railguns)

Experiments with brush projectiles in a parallel augmented railgun

Predicting bore deformations and launcher stresses in railguns

Ultra-stiff, low mass, electromagnetic gun design

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