Hydraucone
![Hydraucone Draft Tube being manufactured for a small (200kW) hydro project at Moulin D'Aillevans, France. 2012](/Images/godic/202501/19/Hydraucone_Draft_Tube_Example4750.jpg")
![Hydraucone Draft Tube with flat plate deflector at Niagara Falls Power Company](/Images/godic/202501/19/page1-220px-Hydraucone_at_Niagara_Falls_Power_Company.pdf4750.jpg")
![Moody Spreading Draft Tube with center cone](/Images/godic/202501/19/page1-220px-Moody_Draft_Tube_PDF_II.pdf4750.jpg")
A hydraucone is a form of draft tube used with a hydro turbine. It has a bell-mouth shape and its salient feature is a flat plate deflector near the mouth. The term hydraucone was introduced by William M. White, who obtained a U.S. patent for it in 1917.