Black swan emblems and popular culture cluster in Australia: Upper Swan, Middle Swan, Swan Valley, Swan View, West Swan, Swan Estuary, Swan District, and the City (formerly Shire) of Swan. The Swan Land District is the major cadastral unit of the state, underlying much of the name cluster. There are at least twenty "Swan" street names in the Perth metropolitan area. There are no "White Swan" toponyms in the state, and the toponymist Reed lists only the Swan River as a "Swan" toponym in the state. The rarer form of "Cygnet" ("young swan") only occurs in three places, all along the Kimberley coast, where they commemorate
Swan neck duct low pressure turbine. For the latter purpose a swan neck duct is an example of an "inter-turbine diffuser". Swan neck duct A swan neck duct is a jet engine component, usually situated within the compression or turbine expansion system. Many jet engines have a short annular passageway, linking two components, where there is a large change in mean radius, from front to rear. The shape of the resulting passageway is often similar to that of a swan or goose neck. Consequently, such a passageway is called a swan (or goose) neck duct. The duct provides a continuous matching of the