. American engineer and railroad journal . FIFTY-TON STEEL ORE CAR—DULUTH & IRON RANGE RAILROAD. SUMMERS STEEL ORE CAR. The Duluth & Iron Range Railroad has eight hundred Sum-mers ore cars that have been in service for some time and aremaking enviable records as compared with other types of carsin the same service. These cars were illustrated and describedin our February issue, page 49. It has been found that the work- men, when working at their usual rate of speed, will unloadfrom 40 to 50 of the Summers cars in the same time requiredfor unloading one of the ordinary steel hopper cars. As an
. American engineer and railroad journal . FIFTY-TON STEEL ORE CAR—DULUTH & IRON RANGE RAILROAD. SUMMERS STEEL ORE CAR. The Duluth & Iron Range Railroad has eight hundred Sum-mers ore cars that have been in service for some time and aremaking enviable records as compared with other types of carsin the same service. These cars were illustrated and describedin our February issue, page 49. It has been found that the work- men, when working at their usual rate of speed, will unloadfrom 40 to 50 of the Summers cars in the same time requiredfor unloading one of the ordinary steel hopper cars. As an example, the following data was taken while the menwere working at their usual rate, not realizing that they werebeing watched closely or that the time of the various operationswas being observed:. summers ore car with the drop doors closed and opened. August. 1909. AMERICAN ENGINEER AND RAILROAD JOURNAL. 339 MAKI n. X < V 6 a -. 6z COMMENCETO OPEN-DOORS ALL ORE• JIT AT i ■■-• i LOS1 i AT TIMECONSTJMl iiMill se, AVI I MAN Min. Sec. Summers old Type Summers 101010816 664236 3 .15:15 :29 :54 :47 5:07 3:38-38 :20 :19 3 : IS3 : 2n 7 : (III 6 : 00 2 : 02 : 010 . : 37 «2 : 15 1:51 IM. !• M. The first three items of ten cars each all contained the samekind of ore and the time did not include closing the doors afterthe loads were out. The time for the last two items of 8 andKi Summers cars included closing the doors ready to load again. A number of the cars have recently been equipped with anair operating mechanism for opening and closing the doors. Thetotal time required to open the doors, drop the load and closethem, ready for reloading, is from io to 15 seconds per car. A50-ton load has been unloaded and the door clo
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
