St Louis-San Francisco 2-10-2 "Santafe" Locomotives in the USA

The St Louis - San Francisco Railway ordered and received a total of sixty "Santa Fe" type locomotives all built by the Baldwin Locomotive Works. They came in three batches of twenty one each in 1916, 1917 and 1918 and were numbered 1 through 60.

These locomotives had 60" diameter drivers, 29" x 30" cylinders, a 200 psi boiler pressure, they exerted 71,485 pounds of tractive effort and each weighed 380,000 pounds.

They were delivered with combustion chambers that permitted an increase in firebox volume while reducing the firetube length. The same 13" piston valves used in the newly minted 1601 Pacifics served the larger cylinders on these 2-10-2s. Several other components were shared by the two classes including the Jacobs-Shupert bolted fireboxes, driving-axle journals, the trailing trucks, and identical-width locomotive frames. The front truck was equalized with the first two driving axles while the trailing truck equalized with the last three driving axles. Almost all were later rebuilt with radial stay boilers and thermic siphons.

There are no surviving SL-SF 2-10-2 "Santa Fe" type locomotives.


Roster by Richard Duley

Qty.Road NumbersYear BuiltBuilderNotes
201-201916Baldwin1
2021-401917Baldwin1
2041-601918Baldwin1
Notes: 1. Between in 1936 and continuing through 1942 the SL-SF used the boilers from 34 of these 2-10-2 locomotives to build thirty-four 4-8-2 type locomotives, which were numbered 4300-4310 and 4400-4422. Numbers 19 and 40 scrapped in 1942. All the others scrapped by 1945.

Class Details by Steve Llanso of Sweat House Media

Class 1 - Jacobs-Shupert (Locobase 8537)

Data from reproduction of the Frisco Man newsletter, Vol XI, # 7 (July 1917), pp. 13-16, found on the Frisco Lines history website -- http://198.209.8.207/lochist/frisco/magazines/fm_1917_07/fm_1917_07.pdf, accessed 4 July 2007, as supplemented by SL&SF All Time Loco Diagrams HS Pub supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Vol 55, pp.288+. Works numbers were:

1916

November 44405-44406, 44480

December 44622-44628

1917

January 44831, 44904, 44924, 44930

February 45047-45048, 45059, 45080-45082, 45119-45120, 45239

March 45270-45271, 45326, 45372

April 45448-45449

May 45663

July 45959-45960, 45997-45998, 46006-46007

August 46108-46109, 46168

October 46591, 46712

1918

March 48023, 48071, 48142

April 48294-48297

May 48579, 48681, 48740, 48776

June 49085

July 49230-49231, 49412

August 49484, 49667

September 49737, 49860

These Santa Fes were delivered with combustion chambers that, the article noted, permitted an increase in "furnace volume" (firebox volume) while reducing the firetube length. The same 13" piston valves used in the newly minted 1601 Pacifics (Locobase 8535) served the larger cylinders on these 2-10-2s. Several other components were shared by the two classes including the Jacobs-Shupert bolted fireboxes (that leaked, alas), driving-axle journals, the trailing trucks, and identical-width locomotive frames. The front truck was equalized with the first two driving axles while the trailing truck equalized with the last three driving axles.

Almost all were later rebuilt with radial stay boilers and thermic syphons; see Locobase 8547.


Class 1 - radial-stay (Locobase 8547)

Data from SL&SF All Time Loco Diagrams HS Pub supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

When the one and only class of Santa Fes was delivered to the St Louis-San Francisco beginning in November 1916 (see Locobase 8537), they were fitted

Some time later (Locobase's date is an estimate), all but four were rebuilt with radial-stay boilers with more conventional fireboxes. In the new vessels, the shops put two Nicholson thermic syphons. Other than the deletion of eight fire tubes, the rest of the design was left pretty much as is. Over the course of their careers, nine (8, 23,29, 32, 33, 44, 45, 52, 53) were fitted with Walschaert valve gear.

34 were later described as having been rebuilt beginning in 1936 as 4-8-2s, but Jim Quarles in a 1996 article entitled "Those Magnificent, Distinctive, Homebuilt, Frisco Mountains" (published on the web at http://home.mchsi.com/~zquarles/friscomountains.htm, accessed 7 July 2007) argues that about all that was left of the 2-10-2 in the conversion was the original builder's plate. The others were all scrapped between November 1940 and May 1945.

Specifications by Steve Llanso of Sweat House Media
Class1 - Jacobs-Shupert1 - radial-stay
Locobase ID8537 8547
RailroadSt Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)
CountryUSAUSA
Whyte2-10-22-10-2
Number in Class6056
Road Numbers1-601-60
GaugeStdStd
Number Built60
BuilderBaldwinFrisco
Year19171925
Valve GearBakerBaker
Locomotive Length and Weight
Driver Wheelbase (ft / m)21 / 6.4021 / 6.40
Engine Wheelbase (ft / m)39.08 / 11.9140.50 / 12.34
Ratio of driving wheelbase to overall engine wheebase 0.54 0.52
Overall Wheelbase (engine & tender) (ft / m)76.29 / 23.2576.29 / 23.25
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)296,000 / 134,264318,260 / 144,360
Engine Weight (lbs / kg)380,000 / 172,365411,300 / 186,563
Tender Loaded Weight (lbs / kg)189,600 / 86,001194,900 / 88,405
Total Engine and Tender Weight (lbs / kg)569,600 / 258,366606,200 / 274,968
Tender Water Capacity (gals / ML)10,000 / 37.8810,000 / 37.88
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)18 / 16.4018 / 16.40
Minimum weight of rail (calculated) (lb/yd / kg/m)99 / 49.50106 / 53
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 152460 / 1524
Boiler Pressure (psi / kPa)200 / 13.80200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)29" x 30" / 737x76229" x 30" / 737x762
Tractive Effort (lbs / kg)71,485 / 32425.0971,485 / 32425.09
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.14 4.45
Heating Ability
Firebox Area (sq ft / m2)352.50 / 32.76409.80 / 38.09
Grate Area (sq ft / m2)76.20 / 7.0876.20 / 7.08
Evaporative Heating Surface (sq ft / m2)5125 / 476.305067 / 470.91
Superheating Surface (sq ft / m2)1233 / 114.591233 / 114.59
Combined Heating Surface (sq ft / m2)6358 / 590.896300 / 585.50
Evaporative Heating Surface/Cylinder Volume223.46220.93
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation15,24015,240
Same as above plus superheater percentage18,13618,288
Same as above but substitute firebox area for grate area83,89598,352
Power L115,68315,882
Power MT584.04550.08

Photos

Reference