. Electric railway journal . Steeple-Type Cab SWITCHMANS. Type Cab DIAGRAMS OF STEEPLE AND BOX-TYPE CABS OFELECTRIC LOCOMOTIVES projecting springs and the provision of substantialmeans for transmitting the high tractive effortsrequired in freight service. The various members ofthe trucks are held together by tapered bolts in reamedholes. Swivel trucks with brakes actuated through aradius bar are standard, owing to the ease with whichthey negotiate short radius curves. The preliminary determination of the minimumweight of locomotive for any given service may be madefrom the weight of the traili
. Electric railway journal . Steeple-Type Cab SWITCHMANS. Type Cab DIAGRAMS OF STEEPLE AND BOX-TYPE CABS OFELECTRIC LOCOMOTIVES projecting springs and the provision of substantialmeans for transmitting the high tractive effortsrequired in freight service. The various members ofthe trucks are held together by tapered bolts in reamedholes. Swivel trucks with brakes actuated through aradius bar are standard, owing to the ease with whichthey negotiate short radius curves. The preliminary determination of the minimumweight of locomotive for any given service may be madefrom the weight of the trailing load, average car weight,speed, grade and service—together with the probabletrain resistance values and a reasonable assumption ofacceleration and adhesion factors. It is also necessaryto know what the drawbar pull would be under the worstrunning and starting conditions of resistance. , Table III shows the weight of train that can bestarted on a given resistance appliesto the friction and windageof a train in motion; it is avariable rat
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