Baldwin 4-10-2 (Southern Pacific or Overland) Type Locomotives

Class 60000 (Locobase 419)

This engine was an anniversary locomotive, built as the 60,000th engine to come out of the Baldwin Works. It was a compound locomotive with a single HP cylinder inside and watertube boiler, a sufficiently unconventional combination to attract much notice. The firebox had sides made up of 48 4" diameter water tubes. Each flank of tubes connected to a horizontal cylindrical drum on top. As Paul T. Warner explained in "Design and Construction of Locomotive 60,000" (on the Web at http://www.cwrr.com/Lounge/Reference/baldwin/), "This construction provides a boiler entirely free of staybolts and from flat surfaces requiring staybolts. This feature of the design gives it an important advantage when high steam pressures are to be carried." The horizontal, 26"-diameter drums ran longitudinally 23 1/2 ft from the rear face of the firebox into the boiler.

The engine was powerful, but required considerable maintenance and was not duplicated.

Specifications
Class60000
Locobase ID419
RailroadBaldwin
Whyte4-10-2
Road Numbers60000
GaugeStd
BuilderBaldwin
Year1926
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase22.83'
Engine Wheelbase45.17'
Ratio of driving wheelbase to overall engine wheebase 0.51
Overall Wheelbase (engine & tender)86.98'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers338400 lbs
Engine Weight457500 lbs
Tender Light Weight243400 lbs
Total Engine and Tender Weight700900 lbs
Tender Water Capacity12000 gals
Tender Fuel Capacity (oil/coal)16 tons
Minimum weight per yard of rail on which locomotive could run113 lb rail
Geometry Relating to Tractive Effort
Driver Diameter63.50"
Boiler Pressure350 psi
Cylinders (dia x stroke)27" x 32" (1)
Low Pressure Cylinders (dia x stroke)27" x 32"
Tractive Effort81969 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.13
Heating Ability
Firebox Area772 sq. ft
Grate Area82.50 sq. ft
Evaporative Heating Surface5192
Superheating Surface1357
Combined Heating Surface6549
Evaporative Heating Surface/Cylinder Volume489.68
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation28875
Same as above plus superheater percentage34650
Same as above but substitute firebox area for grate area324240
Power L137145
Power MT1209.97

Photos

Reference

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.

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