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 Wheelbase15.60'15.60'
Engine Wheelbase24.33'24.33'
Ratio of driving wheelbase to overall engine wheebase 0.64 0.64
Overall Wheelbase (engine & tender)59.94'59.27'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers180200 lbs182800 lbs
Engine Weight205600 lbs210800 lbs
Tender Light Weight156300 lbs152000 lbs
Total Engine and Tender Weight361900 lbs362800 lbs
Tender Water Capacity7500 gals7500 gals
Tender Fuel Capacity (oil/coal)15 tons3222 gals
Minimum weight of rail (calculated)75 lb/yard76 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter57"57"
Boiler Pressure210 psi180 psi
Cylinders (dia x stroke)22" x 30"24" x 30"
Tractive Effort45471 lbs46383 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.96 3.94
Heating Ability
Firebox Area181 sq. ft181 sq. ft
Grate Area49.50 sq. ft49.50 sq. ft
Evaporative Heating Surface3424 sq. ft2694 sq. ft
Superheating Surface559 sq. ft
Combined Heating Surface3424 sq. ft3253 sq. ft
Evaporative Heating Surface/Cylinder Volume259.41171.51
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation103958910
Same as above plus superheater percentage1039510425
Same as above but substitute firebox area for grate area3801038119
Power L165439395
Power MT320.20453.23


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