Fatigue Testing of Wire: A New Machine Designed for Research and Experimental Use in Factories

IN the report of the Fourth International Congress on Applied Mechanics published on pp. 215–219, 224, of the August issue of AIRCRAFT ENGINEERING, mention only was made of a paper by Prof. B. P. Haigh and Mr. T. S. Robertson, describing a new machine for the commercial fatigue testing of wire. In view of the obvious importance of fatigue in connection with materials used in aeroplanes and the liability to fracture of such components as wires, copper pipes, etc., from this cause, such a machine is clearly of special interest to the aircraft industry. Through the courtesy of Messrs. Bruntons, of Musselburgh, who are manufacturing the machine, we are able to give the following full description of it.