Abstract: A liquid propellant modular gun has a slim profile and is constructed for wide latitude in gun cluster configuration.The modular gun has a stationary barrel and is externally driven and cam operated by a drive cam and a control cam.The drive cam has one internal spiral cam track for driving the bolt forward to a projectile firing position and another internal spiral cam track for driving the bolt rearward to a projectile loading position.The control cam is mounted for rotation at the forward end of the drive cam and controls the injection of liquid propellant into the combustion chamber and an electrical igniter.A water injection mechanism is also associated with the control cam for injecting a small amount of water into the combustion chamber after the firing of each round to cool the combustion chamber structure by internal water cooling. The water injection mechanism is also effective to purge propellant from the combustion chamber in the event of a misfire.

Abstract: A liquid propellant modular gun has a slim profile and is constructed for wide latitude in gun cluster configuration.The modular gun has a stationary barrel and is externally driven and cam operated by a drive cam and a control cam.The drive cam has one internal spiral cam track for driving the bolt forward to a projectile firing position and another internal spiral cam track for driving the bolt rearward to a projectile loading position.The control cam is mounted for rotation at the forward end of the drive cam and controls the injection of liquid propellant into the combustion chamber and an electrical igniter.A water injection mechanism is also associated with the control cam for injecting a small amount of water into the combustion chamber after the firing of each round to cool the combustion chamber structure by internal water cooling. The water injection mechanism is also effective to purge propellant from the combustion chamber in the event of a misfire.

Abstract: A liquid propellant is burned in the bulk mode and in pulses to produce high combustion pressures with large power outputs. The pulsed high pressure liquid propellant combustion is also used for producing sound waves for underwater seismic exploration. The high combustion pressures produced by burning the liquid propellant in the bulk mode and in pulses may be used to overcome high back pressures such as those existing at deep drilling depths and in deep ocean depths.

Abstract: A gun of the kind in which liquid propellant is burned in the firing chamber to fire a projectile from the gun is constructed so that a number of gun modules can be combined in a modular gun. Each gun module is cam controlled, and a common cam is used to control each gun module in the modular gun. The cam can be a flexible cam having a belt configuration to permit the gun modules to be arranged in both circular groupings and in non-circular groupings, such as side by side. The modular gun includes fixed, non-rotating gun modules to eliminate the need for tangential velocity correction factors in the fire control and the need to accelerate the mass of the barrel assembly to operational speed. The individual gun module includes propellant injection mechanism for injecting propellant at high pressure when a non-hypergolic bi-propellant is used as the propellant. One or more hydraulic actuators are used to develop the high injection pressures and to operate other components of the gun, such as the bolt.