Abstract: A combiner assembly for a ceiling mounted projection head up display system for an aircraft cabin has an optical combiner (10), and a support mechanism (30, 32, 35) for supporting the optical combiner to be movable between an operational position and a stowage position, above the user, and laterally displaced, and facing an underside of the projector assembly by means of a lateral component of movement and a rotation component to reach the stowage position under the projector assembly (20). Such a two axis movement can make better use of limited headroom in cabins such as those of small aircraft, by enabling a stowage location offset to one side of the line of sight, while providing sufficient clearance from the user's head and from cabin structure, during the movement and/or when in the storage position.

Abstract: There is disclosed a rotorcraft comprising: an array of lift devices; a pilot housing; connecting lines attaching the pilot housing to the array of lift devices; and an actuator interface at the pilot housing such that the pilot can 5 steer the rotorcraft.

Abstract: A method of fabricating, at least in part, an article from a precursor thereof, the method comprising: providing the precursor, wherein the precursor comprises a metal having a closed pore therein; and hot isostatic pressing, HIPing, the precursor at an Nth temperature of a set of temperatures, at an Nth pressure of a set of pressures and for an Nth duration of a set of durations, thereby fabricating, at least in part, the article; wherein HIPing the precursor comprises regulating the set of temperatures, the set of pressures and/or the set of durations to control, at least in part, a morphology of the closed pore.

Abstract: There is disclosed a rotorcraft comprising: an array of lift devices supported at a structure; a first group of the lift devices configured to generate thrust in a first common direction; a second group of the lift devices being tilted or tiltable relative to the first group of devices so as to generate thrust in at least a second common direction; and a flight control system.

Abstract: An apparatus and method for displaying an operational area to an operative of a host platform, said operational area being defined within an external real-world environment relative to said host platform, the apparatus comprising a viewing device (12) configured to provide to said operative, in use, a three-dimensional view of said external real-world environment, a display generating device for creating images at the viewing device, and a processor (32) comprising an input (34) for receiving real-time first data representative of a specified target and its location within said external real-world environment and configured to receive or obtain second data representative of at least one characteristic of said specified target, the processor (32) being further configured to: use said first and second data to calculate a geometric volume representative of a region of influence of said specified target relative to said real-world external environment and/or said host platform, generate three-dimensional image da

Abstract: There is disclosed an aircraft configured to collect air data, the aircraft comprising: a wing structure; a forebody, forward of the wing structure; an afterbody, backward of the forebody; a skin covering the wing, the forebody and the afterbody; at least one recess formed at the skin, the recess being configured to affect the pressure of air flowing at the recess; at least one ambient sensor port for measuring ambient air pressure at the skin; and at least one recess sensor port for measuring the air pressure at the recess.

Abstract: A method and system method for estimating fatigue damage in a structure obtains fatigue damage data collected using at least one sensor associated with the structure during at least one test operation and also obtains structure use parameter data collected during the at least one test operation. The obtained fatigue data and the obtained use parameter data are used to compute coefficients of at least one generic polynomial function that outputs a fatigue damage value based on inputs representing use parameter data. The at least one generic polynomial function is used to output an estimated fatigue damage value based on inputs representing use parameter data collected during use of the structure.

Abstract: The invention relates to a process for forming a pre-defined recess in a cured or cast explosive composition comprising the steps of: i) providing a female mould, ii) providing a male former, and locating said male former proximate to the female mould to create a gap between said male former and female mould, iii) forming an admixture of a curable/castable explosive composition, charging the gap with the admixture of explosive composition, causing the cure or cast of said curable/castable explosive composition, removing the male former to furnish a cured or cast explosive composition with a pre-defined recess.

Abstract: A method of friction-stir welding, FSW, a joint J, for example a T joint and/or a lap joint, between a first workpiece W1 and a second workpiece W2, is described.

Abstract: A method to obtain total compensation force information of a user input device is disclosed. The method comprising obtaining velocity information of a portion of the user input device. Obtaining acceleration information of the portion of the user input device. Obtaining damping force information force based on the velocity information. Obtaining inertial compensation force information based on the acceleration information. Combining the damping compensation force and inertial compensation force to provide the compensation force information of the user input device.

Abstract: An airframe 1 or part thereof comprises a set of modular cells 10, including a first cell 10A comprising a set of profiles 100 including: a first structural profile 100A, having a first length L1 and enclosing a first volume V1 providing a first passageway P1; and a second profile 100B, having a second length L2 and enclosing a second volume V2, wherein the first passageway P1 is arranged to receive the second profile 100B therein.

Abstract: A method of estimating a property of an article manufactured, at least in part, by additive manufacturing, AM, preferably directed energy deposition, DED, and/or powder bed fusion, PBF, is described. The method implemented, at least in part, by a computer comprising a processor and a memory. The method comprises: obtaining a set of in-process parameters of the AM of the article, wherein respective parameters of the set thereof have positional information associated therewith; inferring a set of attributes of the article corresponding to the set of in-process parameters, wherein respective attributes of the set thereof have the positional information associated therewith; and estimating the property of the article based, at least in part, on the inferred set of attributes.

Abstract: A method of producing at least part of a structural frame of a vehicle, the method comprising: providing a support structure (300), the support structure (300) comprising: a plurality of elongate members (301); and one or more retaining members (208) configured to retain the elongate members (301); mounting a plurality of first structural components (206) to the support structure (300) by coupling the first structural components (206) to the elongate members (301) such that each first structural component (206) occupies a different respective position along the elongate members (301); and attaching a plurality of second structural components (204) to the first structural components (206), thereby coupling together the first structural components (206) to form the at least part of the structural frame of a vehicle.

Abstract: A workbench system comprising: a workbench; a multi-axis robot; a visible light projector; and a controller; wherein the workbench and the robot are located in a common workspace; the controller is configured to: determine a movement operation for the robot; and, using the determined movement operation, control the visible light projector to project a visible light indication onto at least one of a surface of the workbench and a surface of the workspace; the visible light indication indicates a limited area of the workbench and/or workspace, the limited area corresponding to a limited volume of space; and the movement operation is such that, if the robot performs the movement operation, the robot moves entirely within only the limited volume of space.

Abstract: A corrosion sensor is described. The corrosion sensor comprises a substrate 10 and a patterned conductive layer provided on the substrate 10, wherein the conductive layer defines: a common terminal; a set of terminals, including a first terminal and a second terminal; and a set of sensing elements, including a first sensing element and a second sensing element; wherein respective sensing elements of the set thereof are electrically coupled to the common terminal and to respective terminals of the set thereof, such that the respective terminals of the set thereof are specific to the respective sensing elements of the set thereof.

Abstract: The present disclosure provides a system for intercepting a rogue drone, the system comprising: a broad-angle electromagnetic radiation emitter for illuminating a cone of sky with coded electromagnetic radiation; and an air vehicle. The air vehicle comprises: an electromagnetic radiation detector for receiving coded electromagnetic radiation reflected from a rogue drone operating in the cone of sky, the detector comprising a notch filter for selecting the coded electromagnetic radiation and for disregarding light from other sources; and a controller for determining the position of the rogue drone based on the received coded electromagnetic radiation. The present invention also provides an air vehicle for intercepting a rogue drone and a method of intercepting a rogue drone.

Abstract: There is disclosed a rotorcraft comprising: an array of lift devices supported at a structure; a first group of the lift devices configured to generate thrust in a first common direction; a second group of the lift devices being tilted or tiltable relative to the first group of devices so as to generate thrust in at least a second common direction; and a flight control system.

Abstract: Specimens for evaluating corrosion protection of substrates due, at least in part, to coatings applied thereupon are described. A specimen (1) comprises: a first coating (10), comprising a first set of layers (11) including a first layer (11A), on a first substrate (12); and a first set of perforations (100), including a first perforation (100A) and a second perforation (100B), in the first coating (10), wherein the first perforation (100A) has a first depth D1 through the first coating (10) and a first dimension W1 transverse to the first depth, wherein the second perforation (100B) has a second depth D2 through the first coating (10) and a second dimension transverse to the second depth D2 and wherein the first dimension W1 and the second dimension W2 are different.

Abstract: A video processing system (100) comprises at least one controller (102) configured to receive a plurality of video data from a respective plurality of video data sources (106, 208). The system can assign one of a plurality of hierarchical display layers to each of the plurality of video data, and generate an output video for display, the output video comprising at least a portion of each of the plurality of video data layered according to the assigned hierarchical display layers. The plurality of hierarchical display layers is based on a respective plurality of safety/security levels defined in a safety/security standard.

Abstract: A method of forming a metal component from metal powder which includes exposing the metal powder to an inert gas; consolidating the metal powder into a solid metal; followed by exposing the solid metal to a hot isostatic pressing process to form a metal component, wherein the hot isostatic pressing process has one initial compression cycle followed by at least one decompression and recompression cycle.