Abstract: An aircraft turbomachine including a mechanical reduction gear including one sun gear, a ring gear, planet gears which are meshed with the sun gear and the ring gear, each planet gear including a first toothing for meshing with the sun gear, and a second toothing for meshing with the ring gear, the first toothing of each planet gear having a diameter greater than that of the second toothing of the planet gear, and a planet carrier, wherein the sun gear is coupled to a first rotor shaft of the turbomachine, the planet carrier is coupled to a second rotor shaft of the turbomachine, the ring gear is fixed to a stator of the turbomachine.

Abstract: Provided is a battery assembly that includes an electrically-conductive housing (510A, 510B), one or more battery modules (512) electrically coupled to a busbar (522), the one or more battery modules and busbar being received in the housing. A non-woven core layer (506) is disposed between the busbar and electrically-conductive housing, the non-woven core layer comprising a plurality of fibers, the plurality of fibers comprising 60-100 wt % of oxidized polyacrylonitrile fibers. The non-woven core layer can exhibit a breakdown voltage of at least 0.9 kV at ambient conditions after exposure to 500° C. for 5 minutes.

Abstract: A device for igniting a torch by means of pyrotechnical cartridges, wherein each cartridge is placed in a casing located at a first distance of one to ten meters from the geometrical axis of the torch and at a second distance of two to twenty meters below the orifice of said torch, said casing being provided with a cover adapted to be moved from a closed position wherein the cartridges within the casing are contained in a thermally isolated tight compartment to an open position wherein each cartridge is aimed at a selected point located on the torch axis at a third distance of one to ten meters above the torch orifice, said second distance being greater than said third distance, and said first, second and third distances being selected in such a manner that a/(b+c) has a value comprised between tangent 45.degree. and tangent 20.degree., wherein a represents said first distance, b represents said second distance, and c represents said third distance.