. Railway mechanical engineer . a tractive effort of 57,000 lb. The arrangement of stress of about 8,000 lb. per sq. in, while the stress on the hanger the sprmg nggmg is shown m Fig. 1. The chief trouble has been which transmits the load to the equalizer, is only 2 740 lb per ^q experienced with the spring hangers breaking in the fillet at the in., which would indicate that the equalizer should fail first upper bosses. A study of the design was made with a view of Hangers which have worn 20 per cent below size on account of RAILWAY AGE GAZETTE, MECHANICAL EDITIOX VciL. 89, No. 1 rubbing on th
. Railway mechanical engineer . a tractive effort of 57,000 lb. The arrangement of stress of about 8,000 lb. per sq. in, while the stress on the hanger the sprmg nggmg is shown m Fig. 1. The chief trouble has been which transmits the load to the equalizer, is only 2 740 lb per ^q experienced with the spring hangers breaking in the fillet at the in., which would indicate that the equalizer should fail first upper bosses. A study of the design was made with a view of Hangers which have worn 20 per cent below size on account of RAILWAY AGE GAZETTE, MECHANICAL EDITIOX VciL. 89, No. 1 rubbing on the frame have also shown indications of falling atthe tillcts at the upper boss. Erom the engine failure reports andfrom an inspection of the hangers taken from a roundhouse scrappile, it has been found that all hangers have broken close to theboss; that hangers with bosses of different lengths have brokenat the end of the longer boss, and all hangers not completelybroken off show a bending at the cracked section, the crack be-. Flg. 2 Fig. 3 Bending of Spring Hangers Due to Side Motion of the Rigging ginning on the inside of the hanger. This would seem to clearlyindicate that the hangers are broken by bending, as the failuresoccur at the section having the largest bending moment. Incomparing these hangers with those of other engines of approx-imately the same weight, and whose spring rigging is of the samedesign and material, it was found that the hangers on the Mikadolocomotives had a longer boss. Since the other engines have not
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
