Simple predictions of fluid velocities and pressures within a high speed, free surface, curved wall jet are shown to agree favorably with results obtained from hydraulic testing of full scale models. The wall jet described forms the design basis of the Fusion Materials Irradiation Test Facility Lithium Target, and has many similarities with wall jets considered for use in various wetted wall fusion reactor concepts. These comparisons show that simple techniques, both analytic and numerical, provide descriptions of the curved wall jet adequate for selection of design and operating parameters.