Show Jr Water ater Cuts Steel In III Testing Device When hen water cuts steel steel that's that's news It is accomplished by a machine developed de to determine the wear on airplane air plane propellers cutting through a foggy morning or the blades of ot a steam turbine in ocean water Only b by such test can the right metal to use for such purpose be determined In brief the machine consists of a adise disc dise wheel geared to a fast motor Two plugs built of metal to be tested are screwed into the rim of the wheel wheeland wheeland wheeland and whirled inside of a casing at the terrific speed of revolutions per second With each revolution of the wheel the plugs pass through jets of water scarcely larger than a pencil lead The impact fills the casing chamber with spray This is supposed to duplicate I fog or rain conditions of the outer air The Thc hardest metals seem soft as cheese when tested in this manner quarter inch plugs of stainless iron or r nickel steel wearing half halt way through due to the erosive action of the water in two or three minutes |