A vane stage comprising: a ringcase extending circumferentially about a center axis of the vane stage, wherein the ringcase extends completely about the center axis to form a first ring; an inner shroud extending circumferentially about the center axis of the vane stage, wherein the inner shroud extends completely about the center axis to form a second ring positioned radially within the ringcase relative the center axis; and a plurality of stationary half vanes extending radially between the ringcase and the inner shroud, wherein the plurality of stationary half vanes are circumferentially spaced about the center axis, wherein the ringcase is axially longer than the inner shroud and increases in diameter aft of the plurality of stationary half vanes, wherein the plurality of stationary half vanes are integral with the ringcase and the inner shroud to make an integral half vane structure, wherein the integral half vane structure is either: formed by machining the ringcase, the inner shroud and the plurality of stationary half vanes from a single piece of metal; made by first forming the ringcase, welding a cylindrical pate inside the ringcase, and machining the cylindrical plate to form the inner shroud and plurality of stationary half vanes; made by separately forming the ringcase, the inner shroud and the plurality of stationary half vanes and welding the ringcase, the inner shroud and the plurality of stationary half vanes together; or formed through additive manufacturing; characterised in that the ringcase comprises a plurality of ribs formed on an outer surface of the ringcase aft of the plurality of stationary half vanes, wherein each of the plurality of ribs increases in radial thickness in an aft direction, wherein the plurality of ribs comprises: an axial rib extending parallel to the center axis; a first angled rib intersecting the axial rib at a node; and a second angled rib intersecting the axial rib and the first angled rib at the node. a ringcase extending circumferentially about a center axis of the vane stage, wherein the ringcase extends completely about the center axis to form a first ring; an inner shroud extending circumferentially about the center axis of the vane stage, wherein the inner shroud extends completely about the center axis to form a second ring positioned radially within the ringcase relative the center axis; and a plurality of stationary half vanes extending radially between the ringcase and the inner shroud, wherein the plurality of stationary half vanes are circumferentially spaced about the center axis, wherein the ringcase is axially longer than the inner shroud and increases in diameter aft of the plurality of stationary half vanes, wherein the plurality of stationary half vanes are integral with the ringcase and the inner shroud to make an integral half vane structure, wherein the integral half vane structure is either: formed by machining the ringcase, the inner shroud and the plurality of stationary half vanes from a single piece of metal; made by first forming the ringcase, welding a cylindrical pate inside the ringcase, and machining the cylindrical plate to form the inner shroud and plurality of stationary half vanes; made by separately forming the ringcase, the inner shroud and the plurality of stationary half vanes and welding the ringcase, the inner shroud and the plurality of stationary half vanes together; or formed through additive manufacturing; formed by machining the ringcase, the inner shroud and the plurality of stationary half vanes from a single piece of metal; made by first forming the ringcase, welding a cylindrical pate inside the ringcase, and machining the cylindrical plate to form the inner shroud and plurality of stationary half vanes; made by separately forming the ringcase, the inner shroud and the plurality of stationary half vanes and welding the ringcase, the inner shroud and the plurality of stationary half vanes together; or formed through additive manufacturing; characterised in that the ringcase comprises a plurality of ribs formed on an outer surface of the ringcase aft of the plurality of stationary half vanes, wherein each of the plurality of ribs increases in radial thickness in an aft direction, wherein the plurality of ribs comprises: an axial rib extending parallel to the center axis; a first angled rib intersecting the axial rib at a node; and a second angled rib intersecting the axial rib and the first angled rib at the node. an axial rib extending parallel to the center axis; a first angled rib intersecting the axial rib at a node; and a second angled rib intersecting the axial rib and the first angled rib at the node.