Western Pacific 2-8-0 "Consolidation" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class C-43 (Locobase 5379)

Data from table in the June 1907 AERJ. Roster information from Frank Brehm's compilation hosted at http://www.wplives.com/motivepower/srosters/Class_1_Roster__/class_1_roster__.html (accessed 3 July 2006). Works numbers were 29160 in September; 29173-29174, 29197, 29240-29241, 29273-29274, 29342-29343, 29348-29349 in October; 29442-29445, 29490-29492, 29509 in November.

Most had a unit price of $16,598 with four costing $18,996 for some reason.

Although delivered with slide valves, all but one of these first-for-the-railroad Consolidations were soon refitted with piston valves. Still later they were superheated. (See Locobase 3100 for the superheated version.)

Along with the 45 Alcos delivered in 1909, which were similar except for using Walschaert valve gear, these 2-8-0s carried on until the end of steam in some cases. (Some were retired as early as 1937.)


Class C-43 - superheated (Locobase 3100)

Roster information from Frank Brehm's compilation hosted at http://www.wplives.com/motivepower/srosters/Class_21_Roster__/class_21_roster__.html (accessed 3 July 2006). Unlike the Baldwins shown in Locobase 5379, Schenectady produced the entire class as a single batch - works# 46451-46495. A unit price $15,331 was assessed for the first 13. The latter 32 each cost $15,609.

Consolidations originally built as saturated, slide-valve locomotives and later superheated and given piston valves; it is this later modification that is shown in the specifications. An earlier batch from Baldwin (1906) had Stephenson gear. The A/S ratio suggests a very large boiler for the grate. Retirements came in 1939-1954.

Specifications by Steve Llanso of Sweat House Media
ClassC-43C-43 - superheated
Locobase ID5379 3100
RailroadWestern Pacific (WP)Western Pacific (WP)
CountryUSAUSA
Whyte2-8-02-8-0
Number in Class2045
Road Numbers1-2021-65
GaugeStdStd
Number Built2045
BuilderBurnham, Williams & CoAlco-Schenectady
Year19061909
Valve GearStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)15.6715.67
Engine Wheelbase (ft)24.3324.33
Ratio of driving wheelbase to overall engine wheebase 0.64 0.64
Overall Wheelbase (engine & tender) (ft)57.9660
Axle Loading (Maximum Weight per Axle) (lbs)46,280
Weight on Drivers (lbs)186,330185,000
Engine Weight (lbs)201,330207,000
Tender Loaded Weight (lbs)183,000157,000
Total Engine and Tender Weight (lbs)384,330364,000
Tender Water Capacity (gals)80008000
Tender Fuel Capacity (oil/coal) (gals/tons)143000
Minimum weight of rail (calculated) (lb/yd)7877
Geometry Relating to Tractive Effort
Driver Diameter (in)5757
Boiler Pressure (psi)200190
High Pressure Cylinders (dia x stroke) (in)22" x 30"22" x 30"
Tractive Effort (lbs)43,30541,140
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.30 4.50
Heating Ability
Firebox Area (sq ft)214218
Grate Area (sq ft)33.6033.60
Evaporative Heating Surface (sq ft)31412292
Superheating Surface (sq ft)733
Combined Heating Surface (sq ft)31413025
Evaporative Heating Surface/Cylinder Volume237.97173.65
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation67206384
Same as above plus superheater percentage67207916
Same as above but substitute firebox area for grate area42,80051,361
Power L1606213,647
Power MT286.90650.52

Reference