The Espee first procured 2-10-2s with this batch from Brooks and Baldwin. Known as "Decks" (Decapods) on the Southern Pacific, the F-1s represented a step up in power over the Mikados and Consolidations that were already in service. They were followed a few years later by the F-3 line, which had a larger cylinder and significantly large heating surface.
RA's account showed a 273,000-lb weight on the drivers. The addition of a Worthington 4S feedwater heater contributed 9,000 lb of weight.
F-1s were apparently quite satisfactory, even though they were less powerful than the later F-3s, and operated on the lines until 1952-1958.
The first in a series of uprated Santa Fes that included the 50 F-4s brought west in a single train called the Prosperity Special in 1922 and 51 F-5s delivered in 1923-1924. All were Baldwin built and all had very similar dimensions. Known as "Decks" (Decapods) on the Southern Pacific. Baldwin works numbers for the F-3: 54312-54313, 54381-54385, 54502-54509; the F-4s were produced in January-April 1922 and had these numbers:
Compared to the later F-5, the F-3s had a slightly lower superheat percentage and as is usual with a series, started off with the lowest weights. RA reported that the new Santa Fes were put in service in the Los Angeles-Bakersfield section, a 171-mile run with 2.2-2.37% grade westbound and 2.23-2.54% grades eastbound. Tonnage ratings for the F-3s (and presumably the F-4 and F-5 engines) came to 1,005 tons westbound, 875 tons eastbound.
Locobase 86 shows a later set of firebox and superheater areas that appears to have been standard for all of the Decks from this era. F-3s served until retirement in 1952-1958; F-4s had a similar career and were retired in 1951-1958.
Boiler had feedwater heater. The last in a run of Santa Fes that included the F-3 (see separate entry) and the 50 F-4s brought west in a single train called the Prosperity Special in 1922. The original 1930 table showed a firebox heating surface of 381 sq ft, which is a minor difference from the SP diagram, and a superheater area of 1,381 sq ft, which was a much greater difference.
Locobase uses the SP measurements on the grounds that that was what the railroad would use to assess relative capacity. The F-3, F-4 (Locobase 3291), and F-6
Most of the F-5s went to the Texas & New Orleans lines, where they worked until retirement in 1949-1956.
| Specifications | |||
|---|---|---|---|
| Class | F-1 | F-3/F-4 | F-5 |
| Locobase ID | 3292 | 3291 | 86 |
| Railroad | Southern Pacific (SP) | Southern Pacific (SP) | Southern Pacific (SP) |
| Whyte | 2-10-2 | 2-10-2 | 2-10-2 |
| Road Numbers | 3601-3652 | 3653-3667, 3668-3717 | 3718-3768 |
| Gauge | Std | Std | Std |
| Builder | several | Baldwin | Baldwin |
| Year | 1917 | 1921 | 1921 |
| Valve Gear | Walschaert | Walschaert | Walschaert |
| Locomotive Length and Weight | |||
| Driver Wheelbase | 22.50' | 22.83' | 22.80' |
| Engine Wheelbase | 41.50' | 42.33' | 42.30' |
| Ratio of driving wheelbase to overall engine wheebase | 0.54 | 0.54 | 0.54 |
| Overall Wheelbase (engine & tender) | 80.21' | 82.62' | 84.11' |
| Axle Loading (Maximum Weight per Axle) | 59600 lbs | 61500 lbs | |
| Weight on Drivers | 282000 lbs | 306000 lbs | 306100 lbs |
| Engine Weight | 352000 lbs | 398000 lbs | 397900 lbs |
| Tender Light Weight | 173460 lbs | 223000 lbs | 239600 lbs |
| Total Engine and Tender Weight | 525460 lbs | 621000 lbs | 637500 lbs |
| Tender Water Capacity | 10030 gals | 12000 gals | 12000 gals |
| Tender Fuel Capacity (oil/coal) | 3120 gals | 4000 gals | 4000 gals |
| Minimum weight per yard of rail on which locomotive could run | 94 lb rail | 102 lb rail | 102 lb rail |
| Geometry Relating to Tractive Effort | |||
| Driver Diameter | 63.50" | 63.50" | 63" |
| Boiler Pressure | 200 psi | 200 psi | 200 psi |
| Cylinders (dia x stroke) | 27.5" x 32" | 29.5" x 32" | 29.5" x 32" |
| Tractive Effort | 64787 lbs | 74554 lbs | 75145 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.35 | 4.10 | 4.07 |
| Heating Ability | |||
| Firebox Area | 332 sq. ft | 381 sq. ft | 381 sq. ft |
| Grate Area | 63 sq. ft | 82.50 sq. ft | 82.50 sq. ft |
| Evaporative Heating Surface | 4462 | 5103 | 5097 |
| Superheating Surface | 950 | 1329 | 1230 |
| Combined Heating Surface | 5412 | 6432 | 6327 |
| Evaporative Heating Surface/Cylinder Volume | 202.83 | 201.58 | 201.35 |
| Computations Relating to Power Output (More Information) | |||
| Robert LeMassena's Power Computation | 12600 | 16500 | 16500 |
| Same as above plus superheater percentage | 14868 | 19965 | 19635 |
| Same as above but substitute firebox area for grate area | 78352 | 92202 | 90678 |
| Power L1 | 14117 | 15861 | 14992 |
| Power MT | 551.82 | 571.36 | 539.88 |
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