Today this would be recognised as a reaction turbine. In reaction turbine pressure drop occurs in both fixed and moving blades. In a Reaction turbine compounding can be achieved only by Pressure compounding. The Francis reaction turbine is still in wide use today. In 1849, James B. Francis improved the inward flow reaction turbine to over 90% efficiency. A reaction turbine needs to fully contain the water during energy transfer. It is an inward-flow reaction turbine that combines radial and axial flow concepts.