. Railway mechanical engineer . ear ends of the main frames. The frames of both typesare six inches wide. The top rail on the Mountain tjpe hasa maximum depth over the pedestal of V^-g in., with a mini-mum depth of 6J-S in. The lower frame rail is iy^, in. indepth over the ends of the pedestal binders and 45/8 in. indepth at the minimum section. The standard pedestal taperin all cases is one in twelve. On the 2-10-2 type the topframe rail is in. deep over the pedestal with a minimumsection 6 in. deep, while the lower rail has maximum andminimum depths of 4-?/4 in. and 44 respectivel
. Railway mechanical engineer . ear ends of the main frames. The frames of both typesare six inches wide. The top rail on the Mountain tjpe hasa maximum depth over the pedestal of V^-g in., with a mini-mum depth of 6J-S in. The lower frame rail is iy^, in. indepth over the ends of the pedestal binders and 45/8 in. indepth at the minimum section. The standard pedestal taperin all cases is one in twelve. On the 2-10-2 type the topframe rail is in. deep over the pedestal with a minimumsection 6 in. deep, while the lower rail has maximum andminimum depths of 4-?/4 in. and 44 respectively. Theframe bracing is similar in both cases. Vertical crossties arebolted to the pedestal jaws of each pair of drivers except therear, the forward casting also being attached to the inclinedlower rail immediately back of the cylinders. Horizontalcrossties are attached to the top rails of the Mountain typelocomotive in front of the forward drivers and between thefirst and second, second and third, and third and fourth ■ hf^ii. -^- -302^- >lkA7i Longitudinal Section of the Boiler for the Standard Light Santa Fe Type standing eight inches above the top of the boiler shell on the4-8-2 and IJ in. on the 2-10-2 type, and has a clear opening tThe curves uf hauling capacity are constructed for a car resistance of4 lb. per ton. The chart may be used for any other car resistance or forany combination of resistances by convertitiR them into terms of lb. car resistance zr .05 per cent 1 degree curve uncompensated := .04 per cent grade For example; Find the tonnage nhich can be hauled in passenger serv-ice by the 4-8-2 type locomotive, nn per cent grade combined with 4dep. uncompensated curve at 40 From Table III fsee the November issue, page 610) the resistance ofpassenger coaches at 40 is !b. per ton. The equivalent gradeIS then: + U X .04) -f (6 65 X .(5) ^ per cent At the intersection of the ordinate for per cent grade with
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