Texas & Pacific 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class F-1 (Locobase 8492)

Data from T&P 1 - 1922 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 38064-38073 in July 1912.

When Baldwin delivered these Consolidations, they had saturated boilers about as big and as stuffed with 2" (50.8 mm) tubes as was possible and they were pressed to about as high a pressure as would make useful amounts of wet steam.

By 1922, when this diagram was published, all but 3 had been redesignated F1s; see Locobase 8493.

Class F-1s (Locobase 8493)

Data from T&P 1 - 1950ca Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Because the boiler was so big in this class when delivered in 1912 as saturated engines (see Locobase 8492), superheating didn't sacrifice quite as much heating surface as often was the case. Although the original tube count after the makeover came to 240-246, the railroad apparently decommissioned a few more (most likely because they were hard to keep clean).

More important, the rebuild led to a drop of 30 psi in working pressure but a greater amount of cylinder volume by increasing the diameter by 2". And 14" piston valves, albeit with a relatively short 5 1/2" travel, replaced the slide valves. So the design should have steamed freely up to boiler capacity. That probably suited the railroad just fine as these were low-drivered, drag-freight locomotives.

Specifications by Steve Llanso of Sweat House Media
Locobase ID8492 8493
RailroadTexas & Pacific (T&P)Texas & Pacific (T&P)
Number in Class1010
Road Numbers401-410401-410
Number Built10
BuilderBaldwinT & P
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)15.6015.60
Engine Wheelbase (ft)24.3324.33
Ratio of driving wheelbase to overall engine wheebase 0.64 0.64
Overall Wheelbase (engine & tender) (ft)59.9459.27
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)180,200182,800
Engine Weight (lbs)205,600210,800
Tender Loaded Weight (lbs)156,300152,000
Total Engine and Tender Weight (lbs)361,900362,800
Tender Water Capacity (gals)75007500
Tender Fuel Capacity (oil/coal) (gals/tons)153222
Minimum weight of rail (calculated) (lb/yd)7576
Geometry Relating to Tractive Effort
Driver Diameter (in)5757
Boiler Pressure (psi)210180
High Pressure Cylinders (dia x stroke) (in)22" x 30"24" x 30"
Tractive Effort (lbs)45,47146,383
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.96 3.94
Heating Ability
Firebox Area (sq ft)181181
Grate Area (sq ft)49.5049.50
Evaporative Heating Surface (sq ft)34242694
Superheating Surface (sq ft)559
Combined Heating Surface (sq ft)34243253
Evaporative Heating Surface/Cylinder Volume259.41171.51
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10,3958910
Same as above plus superheater percentage10,39510,425
Same as above but substitute firebox area for grate area38,01038,119
Power L165439395
Power MT320.20453.23