The Cd'A&S was a short line in eastern Washington-western Idaho that combined with other railroads in 1907 to form the Spokane & Inland Empire. When the S&IE electrified, it sold the 2 to the Spokane, Portland & Seattle as their 156.
The SP&S operated this small, modestly powered, light-footed Ten-wheeler for another 25 years before scrapping it in April 1937.
This was a continuation of the E-14 order then being delivered to the Great Northern (Locobase 8844). The GN and its contentious partner, the Northern Pacific, were stocking the SP & S's motive-power roster. So this set was sent on to the SP & S.
Four were unaltered and scrapped as Ten-wheelers in April and May 1937. The other six were converted to H-1-class Pacifics (see Locobase 8846) and served into the 1950s.
This pair of superheated Ten-wheelers was ordered by the Astoria & Columbia River just before it was taken over by the SP & S. So both were delivered to the successor with the same road numbers and a class D-2 designation.
Both engines operated on the SP & S (most likely on the former A & CR rails) for a long time. 151 was scrapped in February 1948 and 150 in June 1950.
|Specifications by Steve Llanso of Sweat House Media|
|Class||2 / D-5||D-1||D-2|
|Railroad||Coeur d'Alene & Spokane (SP&S)||Spokane, Portland & Seattle||Spokane, Portland & Seattle|
|Number in Class||1||10||2|
|Builder||Burnham, Williams & Co||Baldwin||Baldwin|
|Locomotive Length and Weight|
|Driver Wheelbase (ft)||11.67||15.50||15|
|Engine Wheelbase (ft)||21.62||28.96||27.92|
|Ratio of driving wheelbase to overall engine wheebase||0.54||0.54||0.54|
|Overall Wheelbase (engine & tender) (ft)||61.50||55.50|
|Axle Loading (Maximum Weight per Axle) (lbs)||52,500|
|Weight on Drivers (lbs)||90,000||155,000||112,000|
|Engine Weight (lbs)||120,000||210,000||160,000|
|Tender Loaded Weight (lbs)||60,000||148,200||135,000|
|Total Engine and Tender Weight (lbs)||180,000||358,200||295,000|
|Tender Water Capacity (gals)||3000||8000||7000|
|Tender Fuel Capacity (oil/coal) (gals/tons)||13||4000|
|Minimum weight of rail (calculated) (lb/yd)||50||86||62|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in)||62||73||72|
|Boiler Pressure (psi)||180||200||165|
|High Pressure Cylinders (dia x stroke) (in)||18" x 24"||23.5" x 30"||22" x 26"|
|Tractive Effort (lbs)||19,189||38,582||24,513|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.69||4.02||4.57|
|Firebox Area (sq ft)||132.10||201||163|
|Grate Area (sq ft)||22.80||55||30|
|Evaporative Heating Surface (sq ft)||1539||3370||2248|
|Superheating Surface (sq ft)||530||502|
|Combined Heating Surface (sq ft)||1539||3900||2750|
|Evaporative Heating Surface/Cylinder Volume||217.72||223.77||196.52|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||4104||11,000||4950|
|Same as above plus superheater percentage||4104||12,540||5841|
|Same as above but substitute firebox area for grate area||23,778||45,828||31,736|