Coeur d'Alene & Spokane / Spokane, Portland & Seattle 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 / D-5 (Locobase 11489)

Data from Baldwin Locomotive Works Specification for Engines, as digitized by the DeGolyer Library of Southern Methodist University Vol 26, p. 283. Works number was 23931 in March 1904.

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.

Class D-1 (Locobase 8845)

Data from GN 1916 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 35055-35059, 35096-35100 in August 1910.

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.

Class D-2 (Locobase 13921)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 41, p. 168. Works numbers were 36480-36481 in April 1911.

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
Class2 / D-5D-1D-2
Locobase ID11,489 8845 13,921
RailroadCoeur d'Alene & Spokane (SP&S)Spokane, Portland & SeattleSpokane, Portland & Seattle
Number in Class1102
Road Numbers2100-109150-151
Number Built1102
BuilderBurnham, Williams & CoBaldwinBaldwin
Valve GearStephensonWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)11.6715.5015
Engine Wheelbase (ft)21.6228.9627.92
Ratio of driving wheelbase to overall engine wheebase 0.54 0.54 0.54
Overall Wheelbase (engine & tender) (ft)61.5055.50
Axle Loading (Maximum Weight per Axle) (lbs)52,500
Weight on Drivers (lbs)90,000155,000112,000
Engine Weight (lbs)120,000210,000160,000
Tender Loaded Weight (lbs)60,000148,200135,000
Total Engine and Tender Weight (lbs)180,000358,200295,000
Tender Water Capacity (gals)300080007000
Tender Fuel Capacity (oil/coal) (gals/tons)134000
Minimum weight of rail (calculated) (lb/yd)508662
Geometry Relating to Tractive Effort
Driver Diameter (in)627372
Boiler Pressure (psi)180200165
High Pressure Cylinders (dia x stroke) (in)18" x 24"23.5" x 30"22" x 26"
Tractive Effort (lbs)19,18938,58224,513
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.69 4.02 4.57
Heating Ability
Firebox Area (sq ft)132.10201163
Grate Area (sq ft)22.805530
Evaporative Heating Surface (sq ft)153933702248
Superheating Surface (sq ft)530502
Combined Heating Surface (sq ft)153939002750
Evaporative Heating Surface/Cylinder Volume217.72223.77196.52
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation410411,0004950
Same as above plus superheater percentage410412,5405841
Same as above but substitute firebox area for grate area23,77845,82831,736
Power L1578814,77613,122
Power MT425.34630.49774.88