. American engineer and railroad journal . The trucks are of a design standard to the freightequipment of the Norfolk & Western, and similar to those usedunder the former lot of 50-ton cars. It may be remarked thatthe journals are 5% x 9 ins. and not of the standard M. C. As these cars do not go into interchange, and as notrouble has been experienced in heating of journals, the adop-tion of this size seems justified for this service. The strains in car framing are difficult to accurately estimate,and there is little valuable literature to assist the h> particularly tru
. American engineer and railroad journal . The trucks are of a design standard to the freightequipment of the Norfolk & Western, and similar to those usedunder the former lot of 50-ton cars. It may be remarked thatthe journals are 5% x 9 ins. and not of the standard M. C. As these cars do not go into interchange, and as notrouble has been experienced in heating of journals, the adop-tion of this size seems justified for this service. The strains in car framing are difficult to accurately estimate,and there is little valuable literature to assist the h> particularly true in regard to the steel or composite accompanying diagram was used to approximately analyzethe stresses in the side frames of this car. The arrangementof the sills is such that about 25,000 lbs. is carried by each side,but the load is deep in the center and tapers off toward theends, so that the overhang beyond the bolsters is much less thanin-the ordinary rectangular car body. Properly speaking, the ,, j-?i*-4f-?:i ^y«7j*M. ~2IC4Truch Centers---3l7^Lengtn of Channels - Side Elevation and Some Details of Steel ,000 Pounds Capacity Hopper Coal Cars-Norfolk & Western Railway. erecting shop. Here the sides are lifted up and bolted to place,the balance of the rivets are driven, the buffer beams, couplersand attachments, air brakes, center plates and side bearingsare applied, the frames placed upon the trucks, ready to receivethe woodwork and trimmings. Although the steel frame of this car is so unlike that of itspredecessor, the style, HF, yet the box, doors, winding appara-tus, brakes, etc., are almost identical. The designer was fortunatein being able to preserve the standards adopted for almost everypart of the older car. The changes that were made were forthe betterment of the design, based on a years experience inthe use of the HF 50-ton car. The strap bolts of the formerdesign, used to support the hinge bars were abandoned in favorof machine bolts, suspen
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
