Abstract: A fixed geometry duct defining a gas turbine engine exhaust nozzle includes a plurality of circumferentially adjoining flat triangular facets and coaxial first and second openings at opposite ends thereof. A method of making the duct includes scribing a plurality of lines on a flat sheet metal plate to define the facets, and bending the plate at each of the lines to form the duct.

Abstract: The present invention relates to a device for reducing the vibrations of the rotor of a rotary-wing aircraft, having an oscillating mass (M1), elastically held radially on the hub (4) of the rotor in the vicinity of its axis (X-X) and fixed to an articulated rod (10) substantially longitudinal to said axis (X-X).According to the invention, said device includes:an adjustment oscillating mass (M2), mounted so that it can move on the rod (10) and having an adjustment position for which the frequency of the resonator formed by said oscillating masses (M1, M2) is matched to the frequency of said vibrations; anddrive means (18) for bringing the adjustment oscillating mass (M2) into said adjustment position.

Abstract: A safety device for containers, preferably overhead stowage containers, disposed in the interior of aircraft, comprises, in addition to the conventional mountings, at least one connecting member to the container and at least one connecting member to the fuselage, the connecting members being connected to one another via at least one force deflecting element.