Integral variable performance propellant grain

    公开(公告)号:US10982625B2

    公开(公告)日:2021-04-20

    申请号:US16056293

    申请日:2018-08-06

    Abstract: A solid propellant rocket motor may comprise a core-burning propellant grain extending along a longitudinal axis of the solid propellant rocket motor between an exhaust end of the solid propellant rocket motor and a forward end of the solid propellant rocket motor, a first burn inhibitor layer surrounding the core-burning propellant grain, an end-burning propellant grain surrounding the first burn inhibitor layer, a second burn inhibitor layer surrounding the end-burning propellant grain, and an aperture at least partially defined by the first burn inhibitor layer. The end-burning propellant grain is ignited by the core-burning propellant grain via the aperture.

    SYSTEMS AND METHODS FOR CASTING PROPELLANT GRAIN

    公开(公告)号:US20240149502A1

    公开(公告)日:2024-05-09

    申请号:US18545882

    申请日:2023-12-19

    CPC classification number: B29C39/26 B29C33/448 B29C39/36 F02K9/24 B29K2901/12

    Abstract: Systems and methods for casting solid propellants include a mandrel for forming geometric features in a perforation of a propellant grain. In various embodiments, the mandrel includes a frangible portion that is removed from the propellant grain after the propellant grain has cured around the mandrel. A second portion of the mandrel may be left behind in the propellant grain. The mandrel may include a support structured disposed in the through hole of the mandrel. The support structure may include a plurality of longitudinal channels for directed exhaust gasses through the mandrel upon ignition of the propellant grain.

    Automatic ejection time delay system

    公开(公告)号:US11608183B2

    公开(公告)日:2023-03-21

    申请号:US17201886

    申请日:2021-03-15

    Abstract: A control system for an ejection system may comprise an ejection seat, a canopy jettison system, a sensor, a controller, and a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising receiving an eject command, polling the sensor for a sensor data, receiving the sensor data, passing the sensor data to a time delay logic, determining via the time delay logic a time delay based on the sensor data, and actuating the ejection seat based on the time delay.

    INTEGRAL VARIABLE PERFORMANCE PROPELLANT GRAIN

    公开(公告)号:US20200040849A1

    公开(公告)日:2020-02-06

    申请号:US16056293

    申请日:2018-08-06

    Abstract: A solid propellant rocket motor may comprise a core-burning propellant grain extending along a longitudinal axis of the solid propellant rocket motor between an exhaust end of the solid propellant rocket motor and a forward end of the solid propellant rocket motor, a first burn inhibitor layer surrounding the core-burning propellant grain, an end-burning propellant grain surrounding the first burn inhibitor layer, a second burn inhibitor layer surrounding the end-burning propellant grain, and an aperture at least partially defined by the first burn inhibitor layer. The end-burning propellant grain is ignited by the core-burning propellant grain via the aperture.

    VARIABLE STAND-OFF ASSEMBLY
    6.
    发明申请

    公开(公告)号:US20200003533A1

    公开(公告)日:2020-01-02

    申请号:US16024207

    申请日:2018-06-29

    Abstract: A variable stand-off distance explosive cord assembly for a casing is disclosed. In various embodiments, the assembly includes an explosive cord configured for positioning at a stand-off distance from the casing and a thermally responsive material configured to vary the stand-off distance from a first distance to a second distance.

    AUTOMATIC EJECTION TIME DELAY SYSTEM

    公开(公告)号:US20210323684A1

    公开(公告)日:2021-10-21

    申请号:US17201886

    申请日:2021-03-15

    Abstract: A control system for an ejection system may comprise an ejection seat, a canopy jettison system, a sensor, a controller, and a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising receiving an eject command, polling the sensor for a sensor data, receiving the sensor data, passing the sensor data to a time delay logic, determining via the time delay logic a time delay based on the sensor data, and actuating the ejection seat based on the time delay.

    Variable stand-off assembly
    8.
    发明授权

    公开(公告)号:US10801822B2

    公开(公告)日:2020-10-13

    申请号:US16024207

    申请日:2018-06-29

    Abstract: A variable stand-off distance explosive cord assembly for a casing is disclosed. In various embodiments, the assembly includes an explosive cord configured for positioning at a stand-off distance from the casing and a thermally responsive material configured to vary the stand-off distance from a first distance to a second distance.

    Solid-propellant gas generator assemblies and methods

    公开(公告)号:US11512645B2

    公开(公告)日:2022-11-29

    申请号:US16811673

    申请日:2020-03-06

    Abstract: A solid-propellant gas generator assembly may comprise a bulkhead having an orifice disposed in a housing. The bulkhead may be disposed between a first end and a second end of the housing. The bulkhead and the first end may define a propellant cavity. The bulkhead and the second end may define a pressure chamber. A fast burning solid-propellant may be disposed in the propellant cavity. The solid-propellant gas generator assembly may be configured to replace a slow burning solid-propellant gas generator system in a solid-propellent gas generator system.

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