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

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 -- [], 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, Volume 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.

All but four 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. See also Jim Quarles, "Those Magnificent, Distinctive, Homebuilt, Frisco Mountains" (published on the web at [], first accessed 7 July 2007). (Thanks to Chris Hohl for his 5 July 2019 email noting the increase in boiler pressure and in tender coal capacity.)

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 with Jacobs-Shupert fireboxes.

Some time later (Locobase's date is an estimate), all but four were rebuilt with radial-stay boilers with more conventional fireboxes. Chris Hohl noted that boiler pressure was then set to 210 psi (14.5 bar) and the tender carried 20 tons of coal.. In the new vessels, the shops put two Nicholson thermic syphons that added 76.2 sq ft (7.08 sq m) to the firebox heating surface area. 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. Eleven were made over as the 4300 class (Locobase 8652). The other 23 rebuilds (described in Locobase 224) had many more differences from the original. In fact, Jim Quarles argued 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.