. Railway mechanical engineer . d give a verymuch unbalanced structure, the height or length of the carbeing excessive. Ver^• few designs of wooden 50-ton coal cars have proven successful in heavy train senice. How-ever, it is possible to construct a SO-ton wooden gondolacar so as to Ije reasonably free from failure, but experimentscovering a period of several years have demonstrated thefollowing necessary changes in design: Description. OriRinal. Final. Area of wooden sills 441 sq. in. 425 sq. in. Truck centers 30 ft. 28 ft. ; 5 ft. 6 ft. Diameter of truss rods l^j in. lYs in. Number
. Railway mechanical engineer . d give a verymuch unbalanced structure, the height or length of the carbeing excessive. Ver^• few designs of wooden 50-ton coal cars have proven successful in heavy train senice. How-ever, it is possible to construct a SO-ton wooden gondolacar so as to Ije reasonably free from failure, but experimentscovering a period of several years have demonstrated thefollowing necessary changes in design: Description. OriRinal. Final. Area of wooden sills 441 sq. in. 425 sq. in. Truck centers 30 ft. 28 ft. ; 5 ft. 6 ft. Diameter of truss rods l^j in. lYs in. Number of truss rods 4 8 Knd sills 8 in. by 15 ^i in. S in. by 15 in. and 13 in., 40-lb. channel Draft silts Wooden Cast steel draft arm or two 8-in. 16U-lb. channels with a top cover plate 20 in. by [i in. Cubical capacity 1,200 Tiuck wheelbase 5 ft. 6 in. 5 ft. 6 in. Light weicht lbs. lbs. Most 50-ton steel coal cars have a cubical capacit) of 1,700cu. ft., which gives a rating of 59 lb. per cu. ft. of loading. Section of Underframe Showing Final Design for 50-Ton WoodenCoal and Ballast Cars level full. On the above basis we obtain 1,200 by 59 =70,800 lb. and twenty per cent for heaping we have 84,960 clay, gravel, stone, bricks, etc., it is possible to loudthe equipment to capacity. If practical operating data is worth anything, it is cer-tainl\- useful for comjiarative purposes, and should be usedto arrive at definite limits to be followed in practice. Intimes like these, the mechanical department should conscien-tiously state the limit to which it may safely go in economiz-ing in design and material. If a Wooden coal car of largecapacity is to be built, it is admittedly a mistake to allow End Sills: Draff Sills : Original Sx IS^ Original = l^hile Oal< FinalSxiSand FinahConfinuousChanneli Lb. O ioVlf Top Corer Plate or Cast Steel Draff Arm j^ Inside Lengffj -sys^^ Inside IVidff? = 3 e
Size: 2956px × 846px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
