Southern Pacific 2-10-2 "Santa Fe" Type Locomotives

Class F-1 (Locobase 3292)

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.

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.

See Railway Age, 2 July 1921, which showed a 273,000-lb weight on the drivers. The addition of a Worthington 4S feedwater heater contributed 9,000 lb of weight.

Class F-3/F-4 (Locobase 3291)

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: 55233-

55244, 55261-55272, 55293, 55304-55312, 55326-55338, 55377-55379.

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. Railway Age of 2 July 1921 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.

F-3s served until retirement in 1952-1958; F-4s had a similar career and were retired in 1951-1958.

Class F-5 (Locobase 86)

Data from 1930 Locomotive Cyclopedia.

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. 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	5103
Superheating Surface	950	1329	1329
Combined Heating Surface	5412	6432	6432
Evaporative Heating Surface/Cylinder Volume	202.83	201.58	201.58
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	12600	16500	16500
Same as above plus superheater percentage	15120	19800	19800
Same as above but substitute firebox area for grate area	79680	91440	91440
Power L1	14117	15861	15736
Power MT	551.82	571.36	566.68