An apparatus includes an energy source and an expansion structure. The energy source is configured to convey an amount of energy operable to increase a pressure of a compressible gas disposed in a chamber. The expansion structure is configured to be placed in fluid communication with the chamber and to receive a flow of the compressible gas in response to the increase in pressure. The expansion structure includes an inlet having a first diameter and an outlet having a second diameter greater than the first diameter and is configured to allow the compressible gas to expand as the compressible gas flows from the inlet to the outlet such that a supersonic free jet of the compressible gas exits the outlet. In some instances, the supersonic free jet of the compressible gas can accelerate, relative to the expansion structure, a projectile disposed outside of the expansion structure.

An apparatus includes an energy source and an expansion structure. The energy source is configured to convey an amount of energy operable to increase a pressure of a compressible gas disposed in a chamber. The expansion structure is configured to be placed in fluid communication with the chamber and to receive a flow of the compressible gas in response to the increase in pressure. The expansion structure includes an inlet having a first diameter and an outlet having a second diameter greater than the first diameter and is configured to allow the compressible gas to expand as the compressible gas flows from the inlet to the outlet such that a supersonic free jet of the compressible gas exits the outlet. In some instances, the supersonic free jet of the compressible gas can accelerate, relative to the expansion structure, a projectile disposed outside of the expansion structure.

A gun having at least two combustion chambers, a first combustion chamber being fixed within the gun, subsequent combustion chamber or chambers being movable in the direction of the barrel, wherein the trigger mechanism is adapted to ignite the volatile mixture in the first chamber; and the gun having means to regulate the timing of ignition of the volatile mixtures in the subsequent chamber or chambers to eject the bullet for the barrel. A reloading plate prevents a bullet being loaded, while the volatile mixtures are ignited.

A gun having at least two combustion chambers, a first combustion chamber being fixed within the gun, subsequent combustion chamber or chambers being movable in the direction of the barrel, wherein the trigger mechanism is adapted to ignite the volatile mixture in the first chamber; and the gun having means to regulate the timing of ignition of the volatile mixtures in the subsequent chamber or chambers to eject the bullet for the barrel. A reloading plate prevents a bullet being loaded, while the volatile mixtures are ignited.

An apparatus includes an energy source and an expansion structure. The energy source is configured to convey an amount of energy operable to increase a pressure of a compressible gas disposed in a chamber. The expansion structure is configured to be placed in fluid communication with the chamber and to receive a flow of the compressible gas in response to the increase in pressure. The expansion structure includes an inlet having a first diameter and an outlet having a second diameter greater than the first diameter and is configured to allow the compressible gas to expand as the compressible gas flows from the inlet to the outlet such that a supersonic free jet of the compressible gas exits the outlet. In some instances, the supersonic free jet of the compressible gas can accelerate, relative to the expansion structure, a projectile disposed outside of the expansion structure.

An apparatus includes an energy source and an expansion structure. The energy source is configured to convey an amount of energy operable to increase a pressure of a compressible gas disposed in a chamber. The expansion structure is configured to be placed in fluid communication with the chamber and to receive a flow of the compressible gas in response to the increase in pressure. The expansion structure includes an inlet having a first diameter and an outlet having a second diameter greater than the first diameter and is configured to allow the compressible gas to expand as the compressible gas flows from the inlet to the outlet such that a supersonic free jet of the compressible gas exits the outlet. In some instances, the supersonic free jet of the compressible gas can accelerate, relative to the expansion structure, a projectile disposed outside of the expansion structure.

The present invention relates to a gear cassette (1) for firearms, comprising: a trigger unit (3), the trigger unit comprising means for activating firing of the firearm, and a combustion unit (20) comprising: —a combustion chamber part (21) having an inlet end section (22) and an outlet end section (23) and an annular wall (24) arranged between the inlet end section and the outlet end section, the annular wall and the end sections comprising an inner surface (25) and an outer surface (26), at least one gas inlet (31, 32) and a fire outlet (33), and at least one spark plug (34) projecting into the combustion chamber, wherein the combustion unit further comprises a gas hose (6, 7) connected to the gas inlet (31, 32) of the combustion chamber part (21) for bringing the combustion chamber (74) in fluid communication with a gas unit comprising at least one gas container (4, 5), and wherein the trigger unit (3) is adapted to activate firing of the firearm by igniting gas in the combustion chamber.

A projectile propulsion system comprises a housing defining a chamber, a propulsive charge including a propulsive charge material loadable into the chamber, a projectile loadable into the chamber proximate to the propulsive charge material, an electric pulse discharge subsystem that provides an electric pulse having a specified pulse amperage for a specified pulse period, a current delivery subsystem electrically connecting the electric pulse discharge subsystem to the chamber to deliver the electric pulse to the propulsive charge material, wherein the specified pulse amperage and the specified pulse period are sufficient to cause at least a portion of the propulsive charge material to generate a propulsive force that is at least partially directed onto the projectile to drive the projectile out of the chamber, and a barrel in fluid communication with the chamber configured to receive the projectile as it is driven from the chamber.

A projectile propulsion system comprises a housing defining a chamber, a propulsive charge including a propulsive charge material loadable into the chamber, a projectile loadable into the chamber proximate to the propulsive charge material, an electric pulse discharge subsystem that provides an electric pulse having a specified pulse amperage for a specified pulse period, a current delivery subsystem electrically connecting the electric pulse discharge subsystem to the chamber to deliver the electric pulse to the propulsive charge material, wherein the specified pulse amperage and the specified pulse period are sufficient to cause at least a portion of the propulsive charge material to generate a propulsive force that is at least partially directed onto the projectile to drive the projectile out of the chamber, and a barrel in fluid communication with the chamber configured to receive the projectile as it is driven from the chamber.

A safety device configured to fire projectiles. The safety device includes a firing mechanism, a y-axis frame, an x-axis frame, a first control unit, a camera, and a monitoring control unit. The y-axis frame having a first actuator and the x-axis frame having a second actuator. The monitoring unit having a second control unit, wherein the second control unit is in communication with the first control unit. The safety device capturing imaging and transmitting imaging to the monitoring unit. The monitoring unit generating a display. The second control unit tracking a target on the display and calculating angle coordinates. The second control unit communicating the angle coordinates to the first control unit. The first control unit generating firing coordinates and transmitting the firing coordinates to the first actuator and the second actuator. The first actuator and the second actuator adjusting the firing mechanism position to correspond to the firing coordinates.