An article comprising an electronic safe-arm and fire (ESAF) device for a supercavitating cargo round (SCR) includes discrete electronics, a high-voltage capacitor, a high-voltage switch, and an exploding foil initiator. The discrete electronics includes digital-delay timer circuits, discrete logic circuits, accelerometers, and circuitry for enabling the high-voltage switch. In a method for implementing the safe and arm protocols, sensor readings from sensors on a weaponized UUV are obtained and, when certain conditions are achieved, remove inhibit signals are forwarded to a controller onboard the UUV. When such signals are received in a specified order, and within certain optional specified time delays, the controller arms the ESAF within the SCR. After the SCR fire and leaves the barrel on the UUV, the ESAF monitors certain acceleration/deceleration conditions unique to supercavitation, and applies same to determine whether to detonate the SCR's energetic payload.

An adapter cage is provided for a compressed gas launcher to multiply launch velocity. Kinematics of wheels integral to the adapter cage results in a doubling of the pusher plate velocity as that motion is imparted on a light-weight launch vehicle. The wheels of the adapter cage can press against the launch vehicle and the wheels are pressed against the walls of the launcher for employing friction at the interface of the wheels and the inner surface of the launcher to transfer motion to force out a muzzle cap of the launcher and to enable launch of the launch vehicle.

An adapter cage is provided for a compressed gas launcher to multiply launch velocity. Kinematics of wheels integral to the adapter cage results in a doubling of the pusher plate velocity as that motion is imparted on a light-weight launch vehicle. The wheels of the adapter cage can press against the launch vehicle and the wheels are pressed against the walls of the launcher for employing friction at the interface of the wheels and the inner surface of the launcher to transfer motion to force out a muzzle cap of the launcher and to enable launch of the launch vehicle.

Projectile launch apparatus (20) for use in a fluid environment. The apparatus (20) comprises a launch tube (21) having a supercavitating projectile (24) with cavitator (29) received within the launch tube (21). A means for generating expulsion gas (not visible) is arranged to provide expulsion gas to propel the projectile (24) from the launch tube (21), with means for bleeding expulsion gas (31, 32) being provided to bleed a portion of expulsion gas around the projectile (24). This allows expulsion gases to contribute to the formation of the gas cavity around the supercavitating projectile (24) as the projectile (24) is launched from the launch tube (21). Particularly suited to the deployment of supercavitating projectiles underwater, such as in underwater mine disposal applications.

Projectile launch apparatus (20) for use in a fluid environment. The apparatus (20) comprises a launch tube (21) having a supercavitating projectile (24) with cavitator (29) received within the launch tube (21). A means for generating expulsion gas (not visible) is arranged to provide expulsion gas to propel the projectile (24) from the launch tube (21), with means for bleeding expulsion gas (31, 32) being provided to bleed a portion of expulsion gas around the projectile (24). This allows expulsion gases to contribute to the formation of the gas cavity around the supercavitating projectile (24) as the projectile (24) is launched from the launch tube (21). Particularly suited to the deployment of supercavitating projectiles underwater, such as in underwater mine disposal applications.

An orb or body deployable from a launch tube serves as a countermeasures system. Where used, a tow rocket may be used to tow the orb or body to a desired location generally in front of an oncoming threat, and the tow rocket is released. Multiple line tow rockets are then launched from the orb in every direction, each extending a line connected to the orb to define a spherical volume within which the orb and lines operate. Each line may include at least one of sensors for sensing acoustic, magnetic or other disturbances, countermeasures systems including explosives, antenna, and radiating countermeasures transducers. Explosives or transducers may also be mounted in or to the orb. Magnetic, acoustic or electrical signals or the like may be emitted to confuse a threat, and explosives may be triggered when the threat enters the spherical volume defined by the extended lines.

An article comprising an electronic safe-arm and fire (ESAF) device for a supercavitating cargo round (SCR) includes discrete electronics, a high-voltage capacitor, a high-voltage switch, and an exploding foil initiator. The discrete electronics includes digital-delay timer circuits, discrete logic circuits, accelerometers, and circuitry for enabling the high-voltage switch. In a method for implementing the safe and arm protocols, sensor readings from sensors on a weaponized UUV are obtained and, when certain conditions are achieved, remove inhibit signals are forwarded to a controller onboard the UUV. When such signals are received in a specified order, and within certain optional specified time delays, the controller arms the ESAF within the SCR. After the SCR fire and leaves the barrel on the UUV, the ESAF monitors certain acceleration/deceleration conditions unique to supercavitation, and applies same to determine whether to detonate the SCR's energetic payload.

Disclosed is an ordnance-launching tube, including a rear door and an expulsion circuit between a source of pressurized fluid and the tube, and provided with a unit for closing this circuit having an actuator that can be maneuvered by an operator in order to permit the expulsion, the actuator being associated with a detector for the presence of the rear door in the tube-closing position and with a lock for this rear door in the tube-closing position, which can be actuated via a bolt that the operator can move between a first position preventing expulsion and a second position permitting expulsion when the door is in the closing position and locked. The bolt includes an abutment movable between a position blocking the actuator in position to prevent expulsion, and a position releasing the actuator so that they may be actuated by the operator, and thus permit expulsion.

Disclosed is an ordnance-launching tube, including a rear door and an expulsion circuit between a source of pressurized fluid and the tube, and provided with a unit for closing this circuit having an actuator that can be maneuvered by an operator in order to permit the expulsion, the actuator being associated with a detector for the presence of the rear door in the tube-closing position and with a lock for this rear door in the tube-closing position, which can be actuated via a bolt that the operator can move between a first position preventing expulsion and a second position permitting expulsion when the door is in the closing position and locked. The bolt includes an abutment movable between a position blocking the actuator in position to prevent expulsion, and a position releasing the actuator so that they may be actuated by the operator, and thus permit expulsion.

Underwater craft including means for launching an underwater vehicle using water pressure, including a vehicle-launching tube having a front part and a rear part and the rear part of which is connected to a water distribution tank itself connected to a water tube in which is positioned a piston for delivering water into the rear part of the tube in order to push and eject the vehicle, is characterized in that the piston is associated with a linear electric actuator for moving same.