A modulation device for modulating a gas ejection section, the device being for placing in a nozzle upstream from the throat of the nozzle, the modulation device including a plug having a downstream end forming a member for partially obstructing the nozzle throat; and a plug guide having an internal housing in which the upstream end of the plug is present. The upstream end of the plug is suitable for sliding in the internal housing of the plug guide between a first position in which the upstream end of the plug is present in an upstream portion of the internal housing, and a second position in which the upstream end is present in a downstream portion of the internal housing. The upstream end of the plug is held in the first position by at least one retaining element for breaking under the effect of heat.

A modulation device for modulating a gas ejection section, the device being for placing in a nozzle upstream from the throat of the nozzle, the modulation device including a plug having a downstream end forming a member for partially obstructing the nozzle throat; and a plug guide having an internal housing in which the upstream end of the plug is present. The upstream end of the plug is suitable for sliding in the internal housing of the plug guide between a first position in which the upstream end of the plug is present in an upstream portion of the internal housing, and a second position in which the upstream end is present in a downstream portion of the internal housing. The upstream end of the plug is held in the first position by at least one retaining element for breaking under the effect of heat.

A thruster has an additively-manufactured housing that includes an integrally-formed nozzle with a burst disk in it. The housing is part of a casing that surrounds and encloses a propellant that is burned to produce pressurized gases that burst the burst disk and produce thrust. The thruster may be placed in a receptacle that defines a recess for receiving the thruster. The receptacle also may be additively manufactured. The thruster and the recess both may be cylindrical, with the housing being closely fit with the cylindrical walls of the receptacle. This may allow some of the structural loads on the housing, such as loads produced by the combustion of the propellant, to be transferred to the adjoining walls of the receptacle. This enables the housing to have less structural strength than if it were to have to contain the pressure from the propellant all on its own.

A thruster has an additively-manufactured housing that includes an integrally-formed nozzle with a burst disk in it. The housing is part of a casing that surrounds and encloses a propellant that is burned to produce pressurized gases that burst the burst disk and produce thrust. The thruster may be placed in a receptacle that defines a recess for receiving the thruster. The receptacle also may be additively manufactured. The thruster and the recess both may be cylindrical, with the housing being closely fit with the cylindrical walls of the receptacle. This may allow some of the structural loads on the housing, such as loads produced by the combustion of the propellant, to be transferred to the adjoining walls of the receptacle. This enables the housing to have less structural strength than if it were to have to contain the pressure from the propellant all on its own.

The invention lies in the field the management of pressures and relates to a common bulkhead for a pressure vessel having two chambers, the common bulkhead being intended to be positioned between a first chamber and a second chamber of the pressure vessel and configured to withstand a first predetermined pressure in the first chamber and to allow a fluid from the second chamber to flow above a second predetermined pressure, wherein it comprises: a metallic basic structure comprising a first face intended to be positioned facing towards the first chamber, a second face intended to be positioned facing towards the second chamber, a plurality of through-openings between the first face and the second face having a polygonal-type pattern in section, an external frame at its periphery, a first metallic cap superposed on the first face covering the plurality of through-openings.

The invention lies in the field the management of pressures and relates to a common bulkhead for a pressure vessel having two chambers, the common bulkhead being intended to be positioned between a first chamber and a second chamber of the pressure vessel and configured to withstand a first predetermined pressure in the first chamber and to allow a fluid from the second chamber to flow above a second predetermined pressure, wherein it comprises: a metallic basic structure comprising a first face intended to be positioned facing towards the first chamber, a second face intended to be positioned facing towards the second chamber, a plurality of through-openings between the first face and the second face having a polygonal-type pattern in section, an external frame at its periphery, a first metallic cap superposed on the first face covering the plurality of through-openings.

An electrical device has device electrical contacts that are initially shunted together, to prevent accidental triggering or damage to the device, such as by electrostatic forces. The device is configured to be inserted into a receptacle, with parts of the receptacle disengaging the shunt and making electrical connection within the receptacle, such as with a shunt cutter. The receptacle may also include a pair of receptacle electrical contacts the electrically connect to the device electrical contacts. The configuration, where the shunt is only cut as part of the installation process, enables safer handling of initially-shunted devices, and can also facilitate making blind electrical connections. Making blind connection directly with parts of the receptacle also avoids the need to thread wires through the electrical receptacle and make electrical connections in another way.

An electrical device has device electrical contacts that are initially shunted together, to prevent accidental triggering or damage to the device, such as by electrostatic forces. The device is configured to be inserted into a receptacle, with parts of the receptacle disengaging the shunt and making electrical connection within the receptacle, such as with a shunt cutter. The receptacle may also include a pair of receptacle electrical contacts the electrically connect to the device electrical contacts. The configuration, where the shunt is only cut as part of the installation process, enables safer handling of initially-shunted devices, and can also facilitate making blind electrical connections. Making blind connection directly with parts of the receptacle also avoids the need to thread wires through the electrical receptacle and make electrical connections in another way.

A thermally initiated variable venting system may comprise a first linear shape charge (LSC) coupled to a first sensor and a second LSC coupled to a second sensor. An upper apex of the second LSC may be disposed within a lower apex of the first LSC. The output of the system may vary depending on whether the event is fast cook-off (FCO) or slow cook-off (SCO).

A thermally initiated variable venting system may comprise a first linear shape charge (LSC) coupled to a first sensor and a second LSC coupled to a second sensor. An upper apex of the second LSC may be disposed within a lower apex of the first LSC. The output of the system may vary depending on whether the event is fast cook-off (FCO) or slow cook-off (SCO).