| 词条 | SP&S Class A1 |
| 释义 |
|name =SP&S class A-1{{sfn|Gartner|1990|p=206}} |powertype=Steam |builder = Manchester Locomotive Works |builddate = July 1907 |whytetype = 0-6-0 |gauge = {{track gauge|ussg}} |driverdiameter = 51 in (1.30 m) |locoweight = 150,000 lbs (68 metric tonnes) |fueltype = Oil |cylindercount = 2 |cylindersize = 20x26 inches |boilerpressure = 180 lbf/in² (1,723 kPa) |tractiveeffort = 31,200 lbf |operator=Spokane, Portland and Seattle Railway |locale=United States |operatorclass=A-1 |retiredate = 1946 - 1952 }} The SP&S Class A-1 steam locomotives were a group of 5 identical locomotives. They were used in the rail yards at Portland, Oregon, and Vancouver, Washington, from 1907 to 1952. They were replaced with diesel-electric switch locomotives. BackgroundIn 1907, the new SP&S needed equipment for regular operations. Company officials wanted 25 freight locomotives and two switch locomotives to start with.{{sfn|Gartner|1990|p=14}} The president of the Great Northern Railway advised SP&S officials that his railroad could contribute excess engines.{{sfn|Gartner|1990|p=14}} Because of this, only five switch locomotives were purchased for use in the terminal yards in Portland and Vancouver.{{sfn|Gartner|1990|p=14}} Construction historyAll five locomotives in Class A-1 were built by the Manchester plant of American Locomotive Company. Because of the availability of spare parts from the Northern Pacific Railway in Portland, OR, and Pasco and Vancouver, WA,{{sfn|Gartner|1990|p=14}} these locomotives were identical to Northern Pacific class L-9 switch locomotives.{{sfn|Wood|Wood|1974|p=151}} Operational historyAll five locomotives were delivered to the SP&S in February 1908.{{sfn|Gartner|1990|p=16}} They were initially used in work service completing the North Bank line from Portland to Spokane.{{sfn|Gartner|1990|p=16}} Upon completion of the main line, these locomotives were transferred to the terminals for switching service. In late 1942 and early 1943 all 5 locomotives were assigned to the Portland Terminal yards as switch locomotives.[1] In 1946 locomotive number 2 was sold to the City of Prineville Railway.{{sfn|Gartner|1990|p=206}} With the arrival of SW9 switch engines 43-45 in 1951,{{sfn|Gartner|1990|p=70}} the remaining A-1 class steamers were retired in 1952. NumberingThese locomotives were numbered 1 to 5 DispositionLocomotive number 1 was scrapped April 25, 1952. Locomotive number 2 was sold to the City of Prineville Railway and renumbered as their number 7 on July 31, 1946. Locomotive number 3 was scrapped January 24, 1952. Locomotive number 4 was scrapped April 25, 1951. Locomotive number 5 was scrapped January 24, 1952.{{sfn|Gartner|1990|p=206}} References1. ^{{cite book| title=The Northwest's own Railway| volume=numbers 3 and 4| page=9| publisher=The Spokane Portland and Seattle Railway Historical Society| year=1998}}
6 : Spokane, Portland and Seattle Railway locomotives|0-6-0 locomotives|ALCO locomotives|Steam locomotives of the United States|Railway locomotives introduced in 1907|Standard gauge locomotives of the United States |
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