||Hurry up and wait on the footboard of Butte, Anaconda & Pacific Railway 48 at Rocker, Montana on October 10, 1958, Kodachrome by unknown photographer (it looks like Dick Rumbolz handwriting on the slide mount), Chuck Zeiler collection. I don't know much about these locomotives except that they were 2400 volt, built by GE in 1914-1915, and featured pin-connected trucks. All the drawbar force was through the trucks, the body rode on top. The following is from CERA Bulletin 116, which contained reprints of various the General Electric Company publications, in this case, GE Bulletin CEA-828, published in February 1928: The locomotive equipment consists of 28 units weighing 82.25 tons each, 27 for freight and one for passenger service, and three 40-ton tractor trucks. The three tractor trucks are used with locomotives in Butte Yard, forming a 120-ton six-axle locomotive capable of handling much heavier trains, but at a slightly lower speed. The motors are GE-229-A commutating-pole type, wound for 1200 and insulated for 2400 volts. Two 1200-volt motors are permanently connected in series. The double unit, 160-ton freight locomotive is capable of giving a continuous sustained output of 2100 horsepower. The 2400 volt contactors are operated from the 600 volt control circuit and are specially constructed to separate the 2400 volts from the coils and interlocks which carry the 600 volt current. The controller provides ten steps in series and nine in series-parallel. The transition between series and series-parallel is made by a special change-over switch, which is operated electro-pneumatically. Current is collected by roller pantographs, pneumatically operated and controlled from the Engineer's compartment by an air valve. A 2400-volt insulated bus runs along the center of the cab roof. These buses are connected together by couplers between the two freight units, so that current may be obtained from either of the two collectors. For operating the control and air compressor and for lighting the locomotive and cars, 600-volt current is suppled from a 2400/600 volt dynamotor installed in each locomotive. This machine is similar to the 1200/600 dynamotor, having two distinct sets of armature coils wound on the same core and brought out to the commutator at each end. One of these windings in designed for 1800-volts and the other for 600-volts, the two commutators being connected in series across the 2400-volt circuit. The load current is taken from the 600-volt commutator.
||10/10/1958 Upload Date: 1/23/2013 3:30:46 PM
||BAP 48(R-2 Boxcab) BAP 47(R-2 Boxcab)
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