PURPOSE: To prolong the repetitive service life of an electromagnetic type flying body accelerating device, which accelerates and propels a flying body with Lorentz force acting on a plasma armature consisting of plasma, by forming the armature in an acceleration conduit in which the flying body is arranged.
CONSTITUTION: A flying body 14 shall have a cavity 14S provided with a pair of insulative rails 12a, 12b and a pair of electroconductive rails 11a, 11b, wherein the cavity 14S is formed by closing the flying body launching side and the insulative rail sides of an accelerator conduit 13 while the electroconductive rail sides are held open. Therein the insulative rails 12a, 12b are arranged oppositely to form a passage for the flying body, and the electroconductive rails 11a, 11b are also arranged oppositely to form passage for flying body. When a discharge current flows between the electroconductive rails 11a, 11b, a plasma armature 16 consisting of plasma is formed in the cavity 14S, and there is no risk of the flying body passage surfaces of the insulative rails 12a, 12b to be exposed directly to the plasma armature 16 in high temp., high pressure state.
YABU TADASHI
KOIDE KENJI
IKEDA CHIKAYUKI
