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Apparatus for providing a controlled increase in muzzle velocity of a projectile while reducing peak value of gas pressure inside a gun barrel. A cartridge includes an elongated body having a central bore divided into three chambers, with a fuel chamber separated from an oxidizer chamber and an elon

Apparatus for providing a controlled increase in muzzle velocity of a projectile while reducing peak value of gas pressure inside a gun barrel. A cartridge includes an elongated body having a central bore divided into three chambers, with a fuel chamber separated from an oxidizer chamber and an elongated capillary chamber by a plurality of membranes. A fuse wire and a power supply vaporize a plasma base in the capillary chamber and provide a controlled jet to provide combustion between a second fuel in the fuel chamber and an oxidizer material in the oxidizer chamber. The power supply controls the fuel-oxidizer combustion rate to obtain a relatively steady pressure of long duration against the projectile which results in high projectile velocity with relatively low peak values of pressure in the gun barrel.

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A combustion augmented plasma propulsion apparatus for use in projecting a projectile comprising: a cartridge having a capillary chamber, a fuel chamber and an oxidizer chamber; a plurality of membranes mounted between said chambers; a plasma base mounted in said capillary chamber; an anode mounted

A combustion augmented plasma propulsion apparatus for use in projecting a projectile comprising: a cartridge having a capillary chamber, a fuel chamber and an oxidizer chamber; a plurality of membranes mounted between said chambers; a plasma base mounted in said capillary chamber; an anode mounted adjacent to a first end portion of said capillary chamber; a cathode mounted adjacent to a second end portion of said capillary chamber; a fuse wire mounted in said capillary chamber between said anode and said cathode for ignition of said plasma base; a fuel mounted in said fuel chamber; an oxidizer material mounted in said oxidizer chamber; means for providing electrical power between said anode and said cathode to cause said fuse wire to ignite a portion of said plasma base; and means for providing a controlled amount of electrical power to said plasma base in said capillary chamber to control a rate of burning of said plasma base and thereby control a rate of combustion of said fuel and of said oxidizer material.