. American engineer and railroad journal . hat the capacity of the car isnot a proper measure of the weight carried by the axle. We will therefore determine for an 80,000-pound-capacity carwhat would be the maximum weight on each axle, and it shouldthen be understood that the design of axle submitted in this reportis one designed to carry that weight, and not an axle for an 80,000-pound-capacity car, regardless of the weight of the car body andtrucks. We may assume for the probable weights of 80,000-pound-capacity cars the following: Gondota car. Weight of body and trucks 35,600 pounds. Lading
. American engineer and railroad journal . hat the capacity of the car isnot a proper measure of the weight carried by the axle. We will therefore determine for an 80,000-pound-capacity carwhat would be the maximum weight on each axle, and it shouldthen be understood that the design of axle submitted in this reportis one designed to carry that weight, and not an axle for an 80,000-pound-capacity car, regardless of the weight of the car body andtrucks. We may assume for the probable weights of 80,000-pound-capacity cars the following: Gondota car. Weight of body and trucks 35,600 pounds. Lading Twenty per cent, additional leiding 16,000 I. J t • V. ,. , 131,600 poundi. Deduct weight of wheels and axles 7,600 5^?- — — C£NT£ff OF dOURN^L S - 6^ ^ ^ L£NGTH Ol7fR ALL - j-iyz se Under Cars of 80,000 Pounds Capacity.)Refrigerator car. Weight of body and trucks 43,(500 Lading 80,000 Ten per cent, additional lading : 8,000 131,600 weight of wheels and axles pounds,or 31,000 pounds per or 31,000 pounds per axle. 121,000 pounds. e -* - Ce/fTf/T TO C£fJT£»l Fig. 5.—Journal Box Complete for 80,000 Lbs. —Distance between bolt centres equals 9 inches. The axle recommended by your committee is therefore designedto carry 31,000 pounds, including body, trucks and lading. It shouldbe distinctly understood that the axle recommended is to carry thisweight, as the sum of the weights of the car body and trucks andlading when using 33-inch wheels. On the basis of 31,0IX) pounds static load on the axle and a max-imum fibre stress of 22,000 pounds the required diameter of the axleat the hub is found by Reuleauxs method to be inches and atthe center inches; or taking the nearest 3s inch for convenience,6V and 5% inches, respectively. To the diameter at the hub it isnecessary to add yi inch to provide for reduction of diameter whenfitting axles to wheels as allowed in the interchange rules; hencethe diameter at the hu
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
