Abstract: A device measures a flight parameter of an aircraft which has a radome. Systems measure the deformation of a wall of the radome due to forces exerted by the air on the radome. A computer computes the flight parameter from deformation measurements obtained by the systems. The systems have an optical fiber carried by the radome provided with Bragg gratings. Each fiber has a plurality of Bragg gratings distributed over a length of the fiber so as to distribute the Bragg gratings over the radome when the fiber is installed.

Abstract: An emergency beacon is configured to replace of one or more navigation lamps installed on an aircraft, which has a fuselage with an outer face, on which is fixed a second interface, on which such a navigation lamp is typically disposed; the emergency beacon includes a base, which has a first interface configured to cooperate with the second interface of the aircraft to fix the base onto the outer face of the fuselage; a casing with a control unit, a radio transmitter for transmitting a distress signal, and a detector to detect abnormal aircraft behavior; and a fixing structure to take up a fixation position, ensuring the casing is fixed to the base, or a separation position, in which it does not ensure the casing is fixed to the base; the transition from fixation position to separation position is controlled by the control unit when an abnormal behavior is detected.

Abstract: A device for measuring at least one flight parameter such as the airspeed, the sideslip angle or the angle of attack, or any other parameter dependent thereon, of an aircraft including a radome, including systems for measuring the deformation of the radome wall due to forces exerted by the air on the radome and a computer for computing from deformation measurements obtained by the systems the required flight parameter or parameters. The systems include at least one optical fiber carried by the radome provided with Bragg gratings, each fiber including a plurality of Bragg gratings distributed over a length of the fiber so as to distribute the Bragg gratings over the radome when the fiber is installed.

Abstract: An aircraft including a fuselage having an outer face on which is fixed a second interface, at least one emergency beacon including a base having a first interface to cooperate with the second interface for fixing of the base onto the outer face, and a casing housing a control unit, a radio transmitter for transmitting a distress radio signal and detector to detect abnormal aircraft behavior, and fixing structure to take up a fixation position to ensure fixing of the casing onto the base or a separation position, in which it does not ensure fixing of the casing onto the base, the transition from the fixation position to the separation position being ordered by the control unit when the detector detect an abnormal behavior.