Abstract: A method of manufacturing a motoring system for a gas turbine engine including the steps of: forming a mechanical shaft fuse, the mechanical shaft fuse including a plurality of through holes; forming an outer housing; installing a reduction gear train into the outer housing, the reduction gear train having an input and an output; operably connecting an electric motor to the input; operably connecting a clutch to the output using the mechanical shaft fuse, the clutch in operation engages and disengages the reduction gear train; operably connecting a starter to the clutch, the starter having an output shaft; and operably connecting an accessory gearbox to the output shaft of the starter. The mechanical shaft fuse in operation shears when torque on the mechanical is greater than or equal to a selected value.

Abstract: A sensor apparatus for photon sensing comprises a plurality of pixel devices, each pixel device comprising: a plurality of photon detectors arranged to produce photon detection signals in response to photon detection events; a processing resource configured to process photon detection signals to produce photon detection event signals, wherein each photon detection event signal comprises time data representative of a photon detection time at which a respective photon detection event occurred; a pixel memory; a further processing resource configured to process the photon detection event signals to obtain detection data representative of photon detection events over a detection period; a communication resource for transmitting the detection data from the pixel device, wherein the processing of the photon detection event signals is such that storing and/or transmission of the detection data uses less storage capacity and/or communication capacity than would be used by storage and/or transmission of the photon det

Abstract: An air turbine starter device includes a gear assembly, a rotor arranged in a cavity of a housing and operably connected the gear assembly, a first manifold having a cavity with a first manifold port operative to direct compressed air to the rotor, and a second manifold having a cavity with a second manifold port operative to direct compressed air to the rotor. The first manifold is larger than the second manifold, the second manifold is fluidly connected in parallel with the first manifold, and the first manifold port and the second manifold port are operative to drive the rotor in a common direction for starting a gas turbine connected to the gear assembly. Air turbine starter systems and methods of starting gas turbine engines are also described.

Abstract: A sensor such as a load cell includes a metal body containing the sensor electronics and flexure elements. Power is brought into the electronics and signals are taken out via header pins arranged in any of various groupings so as to extend through holes in the body. The pins are fixed by means of fused glass or ceramic material and the body is sealed to tolerate harsh environmental conditions.

Abstract: Provided is a protective headgear that includes a first shell section, second shell section, third shell section, and fourth shell section. The first shell section is configured to extend about a head of the user, and include a first central portion, a first strap and a second strap that extend from the first shell section. The first central portion includes a first protective layer and a second protective layer disposed atop the first protective layer. The second shell section is configured to extend about a jaw of the user, and include a second central portion, a third strap and a fourth strap that extend from the second shell section. The third shell section is connected to the first shell section by the first strap and the third strap, and the fourth shell section is connected to the second shell section by the second strap and the fourth strap.

Abstract: According to an aspect, a system for a gas turbine engine includes a reduction gear train operable to drive rotation of a starter gear train that interfaces to an accessory gearbox of the gas turbine engine. The reduction gear train includes a starter interface gear that engages the starter gear train and a core-turning clutch operably connected to the starter interface gear. The reduction gear train also includes a planetary gear system operably connected to the core-turning clutch and a jacking gear system operably connected to the planetary gear system and a core-turning input.

Abstract: An air turbine starter device comprises a rotor arranged in a cavity of a housing, a first manifold having a cavity with a port operative to direct compressed air to the rotor, a second manifold having a cavity with a port operative to direct compressed air to the rotor, wherein the first manifold is larger than the second manifold.

Abstract: A turnaround management system receives a set of tasks. The turnaround management system generates a directed acyclic graph based on the received set of tasks. The turnaround management system determines longest paths through the graph and generates an optimal schedule for the set of tasks based on the determined longest paths. The turnaround management system may additionally analyze the optimal schedule for risk assessment or to predict delay.

Abstract: A motoring system for a gas turbine engine having: a reduction gear train having an input and an output; an electric motor operably connected to the input; a clutch operably connected to the output, the clutch in operation engages and disengages the reduction gear train; and a mechanical shaft fuse operably connecting the output to the clutch, the mechanical shaft fuse in operation shears when torque on the mechanical shaft fuse is greater than or equal to a selected value. The mechanical shaft fuse includes a plurality of through holes.

Abstract: According to an aspect, a system for a gas turbine engine includes a reduction gear train operable to drive rotation of a starter gear train that interfaces to an accessory gearbox of the gas turbine engine. The reduction gear train includes a starter interface gear that engages the starter gear train and a core-turning clutch operably connected to the starter interface gear. The reduction gear train also includes a geared rotary actuator including a primary planetary gear system, where the geared rotary actuator is operably connected to the core-turning clutch. The reduction gear train further includes a secondary planetary gear system operably connected to the primary planetary gear system and a core-turning input. The system also includes a mounting pad with an interface to couple a core-turning motor to the core-turning input of the reduction gear train.

Abstract: A method of manufacturing a motoring system for a gas turbine having the steps of: assembling a pinned mechanical fuse, the pinned mechanical fuse including at least one shear pin; forming an outer housing; installing a reduction gear train into the outer housing, the reduction gear train having an input and an output; operably connecting a motor to the input; operably connecting a clutch to the output using the pinned mechanical fuse, the clutch in operation engages and disengages the reduction gear train; operably connecting a starter to the clutch, the starter having an output shaft; and operably connecting an accessory gearbox to the output shaft of the starter. The clutch is operably connected to the accessory gearbox through the starter and the output shaft. The at least one shear pin in operation shears when torque on the pinned mechanical fuse is greater than or equal to a selected value.

Abstract: A motoring system for a gas turbine engine having: a reduction gear train having an input and output; a motor operably connected to the input; a clutch operably connected to the output, the clutch in operation engages and disengages the reduction gear train; and a pinned mechanical fuse operably connecting the output to the clutch, the pinned mechanical fuse having at least one shear pin. The pinned mechanical fuse having: an outer sleeve having a first section, second section, inner chamber, outer wall, and at least one through hole connecting the inner chamber to the outer wall within the first section; and an inner sleeve having a first portion, second portion, outer surface, and at least one blind hole located in the outer surface within the second portion. The second portion being located within the inner chamber and operably connected to the outer sleeve through at least one shear pin.

Abstract: Provided is a protective headgear that includes a first shell section, second shell section, third shell section, and fourth shell section. The first shell section is configured to extend about a head of the user, and include a first central portion, a first strap and a second strap that extend from the first shell section. The first central portion includes a first protective layer and a second protective layer disposed atop the first protective layer. The second shell section is configured to extend about a jaw of the user, and include a second central portion, a third strap and a fourth strap that extend from the second shell section. The third shell section is connected to the first shell section by the first strap and the third strap, and the fourth shell section is connected to the second shell section by the second strap and the fourth strap.

Abstract: According to an aspect, a system for a gas turbine engine includes a reduction gear train operable to drive rotation of a starter gear train that interfaces to an accessory gearbox of the gas turbine engine. The reduction gear train includes a starter interface gear that engages the starter gear train, a core-turning clutch operably connected to the starter interface gear, and a plurality of stacked planetary gear systems operably connected to the core-turning clutch and a core-turning input. The system also includes a mounting pad including an interface to couple a core-turning motor to the core-turning input of the reduction gear train.

Abstract: A system for performing a medical procedure comprises a first assembly and a second assembly. The first assembly comprises an articulating probe assembly and a first housing. The articulating probe assembly comprises an outer probe and an inner probe. The outer probe comprises: multiple articulating outer links and a first connector. The inner probe comprises multiple articulating inner links and a second connector. The first housing comprises: a proximal portion; a distal portion; and an opening positioned in the first housing distal portion. The articulating probe is constructed and arranged to pass through the first housing opening.

Abstract: A sensor such as a load cell includes a metal body containing the sensor electronics and flexure elements. Power is brought into the electronics and signals are taken out via header pins arranged in any of various groupings so as to extend through holes in the body. The pins are fixed by means of fused glass or ceramic material and the body is sealed to tolerate harsh environmental conditions.

Abstract: An air turbine starter device comprises a rotor arranged in a cavity of a housing, a first manifold having a cavity with a port operative to direct compressed air to the rotor, a second manifold having a cavity with a port operative to direct compressed air to the rotor, wherein the first manifold is larger than the second manifold.

Abstract: An operating method for a batch process, the batch process comprising a plurality of operating phases and within each phase there is provided at least one operating mode, one of the modes of each phase being a standby mode or its equivalent, wherein a transition from a first phase to a second phase requires that the first phase be initialised to its standby mode or equivalent and upon completion of the phase change the second phase enters its standby mode or equivalent.

Abstract: A motoring system for a gas turbine engine having: a reduction gear train having an input and an output; an electric motor operably connected to the input; a clutch operably connected to the output, the clutch in operation engages and disengages the reduction gear train; and a mechanical shaft fuse operably connecting the output to the clutch, the mechanical shaft fuse in operation shears when torque on the mechanical shaft fuse is greater than or equal to a selected value. The mechanical shaft fuse includes a plurality of through holes.

Abstract: According to an aspect, a system for a gas turbine engine includes a reduction gear train operable to drive rotation of a starter gear train that interfaces to an accessory gearbox of the gas turbine engine. The reduction gear train includes a starter interface gear that engages the starter gear train and a core-turning clutch operably connected to the starter interface gear. The reduction gear train also includes a geared rotary actuator including a primary planetary gear system, where the geared rotary actuator is operably connected to the core-turning clutch. The reduction gear train further includes a secondary planetary gear system operably connected to the primary planetary gear system and a core-turning input. The system also includes a mounting pad with an interface to couple a core-turning motor to the core-turning input of the reduction gear train.