Abstract: A vent system includes a vent stack for venting a tank fluid from a fuel tank that is external to the vent stack, during fuelling of the fuel tank. The vent stack includes a conduit including a conduit inlet and a conduit outlet, the conduit outlet opening to atmosphere external to the conduit. The vent stack also includes an opening into the conduit between the conduit inlet and the conduit outlet. The opening is fluidically connected, or connectable, to the fuel tank so the tank fluid from the fuel tank flows through the opening to the conduit outlet, in use. The vent stack also includes a fluid mover operable to cause a mixer fluid receivable in the conduit inlet to flow through the conduit towards the conduit outlet, thereby to mix the mixer fluid with the tank fluid in the conduit, upstream of the conduit outlet.

Abstract: A vent system includes a vent stack for venting a tank fluid from a fuel tank that is external to the vent stack, during fuelling of the fuel tank. The vent stack includes a conduit including a conduit inlet and a conduit outlet, the conduit outlet opening to atmosphere external to the conduit. The vent stack also includes an opening into the conduit between the conduit inlet and the conduit outlet. The opening is fluidically connected, or connectable, to the fuel tank so the tank fluid from the fuel tank flows through the opening to the conduit outlet, in use. The vent stack also includes a fluid mover operable to cause a mixer fluid receivable in the conduit inlet to flow through the conduit towards the conduit outlet, thereby to mix the mixer fluid with the tank fluid in the conduit, upstream of the conduit outlet.

Abstract: A method of fabricating a mechanical part of structure that is defined relative to a predictive search of the risks of crack initiation therein by using a method of calculation by finite elements. A coarse mesh (9) is taken into account, and the individual size of the meshes (20) and a critical distance (d) are defined jointly by an operator. The meshes (20) making up the mesh (9) are defined to be of identical mesh size, with the critical distance (d) being defined as the sum of an integer number of depth dimensions of said meshes (20). If the results of the calculation by finite elements diverge, then a calibration weighting function is advantageously applied that takes account of the size of the meshes (20) by taking account of the critical distance (d).

Abstract: A method of fabricating a mechanical part of structure that is defined relative to a predictive search of the risks of crack initiation therein by using a method of calculation by finite elements. A coarse mesh (9) is taken into account, and the individual size of the meshes (20) and a critical distance (d) are defined jointly by an operator. The meshes (20) making up the mesh (9) are defined to be of identical mesh size, with the critical distance (d) being defined as the sum of an integer number of depth dimensions of said meshes (20). If the results of the calculation by finite elements diverge, then a calibration weighting function is advantageously applied that takes account of the size of the meshes (20) by taking account of the critical distance (d).