Another wheel, similar to the first, but the edge of the buckets had been finished " quarter round." It was tested in the same curb as the first. 18 28 18.27 18 32 18.31 Second test of the No. 1 Tait wheel, the buckets having been "chipped" back three-eighths of an inch, and edges rounded on front side, so as to leave them sharp on back side, between the hoop and crown plate. Same wheel as tested Nov. 4th. It stood in the flume during the interval, and received some hard knocks during the time from a gang of mill-wrights who were fitting up the nearly horizontal draft tube illustrated further along in report. Previous to this second trial the step was taken out, examined and quite likely "trued up," after which operation the wheel became unsteady in motion and difficult to control by brake, though quite the reverse during the first test. Data below for one minute. Multiply revolutions by 20. |