The projectile has an electrically conductive gap-portion that passes through all the gaps of all the stages in a direction transverse to the axes of the coils. Each stage of the launcher includes two or more coils which are arranged coaxially on either closed-loop or straight lines to form gaps between their ends. 8 figs.Īn electromagnetic launcher includes a plurality of electrical stages which are energized sequentially in synchrony with the passage of a projectile. An electric power apparatus controls the electric power supplied to the opposing coils until the gap portion of the projectile substantially occupies the gap between the coils, at which time the coils are supplied with peak current quickly. This allows designs which permit ohmic oblation from the rear surfaces of the gap portion of the projectile allowing much high velocities to be achieved. The gap portion of the projectile permits substantially unrestricted distribution of the induced currents so that current densities are only high where the useful magnetic force is high. The gap portion of the projectile may be flat, rectangular and longer than the length of the opposing coils. A gap portion of the projectile may be made from aluminum and is propelled by the reconnection of magnetic flux stored in the coils which causes accelerating forces to act upon the projectile and at the horizontal surfaces of the projectile near its rear. The magnetic polarity of the opposing coils is in the same direction, e.g. The coils receive an electric current, store magnetic energy, and convert a significant portion of the stored magnetic energy into kinetic energy of the projectile moves through the gap. Potential applications include launching of projectiles for military purposes and for scientific and industrial tests of hypervelocity impacts.Īn electromagnetic launcher includes a plurality of electrical stages which are energized sequentially in the launcher with the passage of a projectiles. Plunger energized mechanically and/or chemically, avoiding need for large electrical power supplies and energy-storage systems. Because it operates with magnetic fields, launcher not limited by gas-expansion thermodynamics. Proposed projectile launcher exploits Meissner effect to transfer much of kinetic energy of relatively massive superconducting plunger to smaller projectile, accelerating projectile to high speed. Superconducting Magnetic Projectile Launcher
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