Baldwin 4-10-2 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 60000 (Locobase 419)

Data from Paul T. Warner, "Design and Construction of Locomotive 60,000" (on the Web at . See also DeGolyer, Vol 77, pp. 826+.Works number 60000 in May 1927.

This engine was an anniversary locomotive, built as the 60,000th engine to come out of the Baldwin Works in the same month that Lindbergh flew solo across the Atlantic Ocean to Paris.

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" (102 mm) diameter water tubes. Each flank of tubes connected to a horizontal cylindrical drum on top. Warner claimed:"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 feet (7.16 m) from the rear face of the firebox into the boiler.

Other features included a Worthington 4-BL feed water heater and pump, three 14" (356 mm) piston valves, and 27 sq ft (2.5 sq m) of direct heating surface area in five arch tubes.

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

Specifications by Steve Llanso of Sweat House Media
Locobase ID419
Number in Class1
Road Numbers60,000
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)22.83
Engine Wheelbase (ft)45.17
Ratio of driving wheelbase to overall engine wheebase 0.51
Overall Wheelbase (engine & tender) (ft)86.98
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)338,400
Engine Weight (lbs)457,500
Tender Loaded Weight (lbs)243,400
Total Engine and Tender Weight (lbs)700,900
Tender Water Capacity (gals)12,000
Tender Fuel Capacity (oil/coal) (gals/tons)16
Minimum weight of rail (calculated) (lb/yd)113
Geometry Relating to Tractive Effort
Driver Diameter (in)63.50
Boiler Pressure (psi)350
High Pressure Cylinders (dia x stroke) (in)27" x 32" (1)
Low Pressure Cylinders (dia x stroke) (in)27" x 32"
Tractive Effort (lbs)81,969
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.13
Heating Ability
Firebox Area (sq ft)772
Grate Area (sq ft)82.50
Evaporative Heating Surface (sq ft)5192
Superheating Surface (sq ft)1357
Combined Heating Surface (sq ft)6549
Evaporative Heating Surface/Cylinder Volume489.68
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation28,875
Same as above plus superheater percentage34,939
Same as above but substitute firebox area for grate area326,942
Power L137,145
Power MT1209.97