Class 1674 (Locobase 8275)

Data from AT&SF 7 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (also visited 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema.

Soon after the Santa Fe took delivery of its tandem-compound 1600-class 2-10-2s, it procured these simple-expansion engine. The grate stayed the same, but the boiler was superheated from the start. As delivered, they had 4 arch tubes that contributed 29 sq ft to the firebox heating surface.

Locobase doesn't know what changes might have been made to these locomotives, but does note that the last wasn't retired until 1956.

Class 3010 (Locobase 5389)

Data from table in May 1916 RME. Data from AT&SF 9 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (accessed 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema.

These twenty engines are probably the result of disassembling the 10 2-10-10-2s that the Santa Fe tried out in 1911. The rear units had the lower numbers. Note that the conversion was to a simple-expansion design. In their new guise, the daughter engines gave decades more service. Retirements began in 1939-1940 and continued until 1950.

Class 3020 (Locobase 70)

Data from AT&SF 9 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (accessed 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema.

Rebuilds of tandem compounds. 3020 burned oil and her tender carried 3,160 gallons of oil. She also had 4 Nicholson arch tubes that contributed 27 sq ft to the firebox heating surface. 3020 apparently was renumbered 3291.

Class 3800 (Locobase 71)

Data from AT&SF 9 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (accessed 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema. Also see http://www.railroadingonline.net/railroads/atsf/drawings/index.shtml, accessed 11 March 2007, for the variety of tube & flue layouts to be found in this class over the years.

Boiler had feedwater heater and the firebox heating surface included 41 sq ft of arch tubes; see Locobase 8263 for the updated version with thermic syphons. Drury (1993) says these were the first Santa Fe Santa Fes that were not "essentially turn-of-the-century Decapods with trailing axles ..." Instead, they were derived from the contemporaneous 3160-class Mikados (Locobase 5499). One was delivered as a 2-10-4; see Locobase 8262.

3800-3828 in 1919,

3830-3839 in 1920,

3840-3849 in 1921

3850-3875 were delivered in 1923,

3891-3899 in 1926

3900-3940 in 1927.

hile the last engine arrived in 1927.

As late as 1950, 132 of these very satisfactory freighters remained in service and an even 100 in 1953. But by 1956, all had been retired.

Class 3800 - thermic syphons (Locobase 8283)

Data from AT&SF 9 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (accessed 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema.

Also see http://www.railroadingonline.net/railroads/atsf/drawings/index.shtml, accessed 11 March 2007, for the variety of tube & flue layouts to be found in this class over the years.

To illustrate at least one of the variations, Locobase shows this modification to the basic design. The big difference showed in the firebox, where 22 1/2 sq ft of arch tubes was removed and 106.5 sq ft of thermic syphons. Only two of the several 3800 drawings on railroadingonline refer to thermic syphons, so Locobase supposes the innovation was not widespread on this class.

Class 900/1600 (Locobase 463)

Data from table in July 1904 AERJ. Data from AT&SF 7 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (also visited 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema.

85 900-class engines built in 1903-1904. Tandem-compound design in which the high-pressure and low-pressure cylinders were lined up one behind the other (HP leading). The class introduced the idea of a "Santa Fe" wheel arrangement that was adopted by several railroads for drag-freight service. Some of the engines were delivered with the rigid, Jacobs Shupert firebox that had no staybolts.

The 1600s, built in 1905-1907, were nearly identical additions, but burned oil and put about a ton more weight on the drivers. According to the Topeka State Journal of 4 Feb 1907, preserved in the clipping collection offered by Frank Ellington on http://atsf.railfan.net/snippets/locomotives.html (visited 23 July 2004), "The firebox contains clay balls about 10 inches in diameter. The oil is turned among these and lighted. The clay balls become intensely hot, giving a much more even heat than coal. "

Locobase had not heard of this aid to combustion, and cannot pin it down further.

These were later rebuilt as two-cylinder simples with 28 x 32-in cylinder dimensions, reduced boiler pressure (to 200 lb psi), and a resulting tractive effort of 74,800 lb See Locobase 8256.

Notice that Locobase 8249 shows a set of Mikados delivered at the same with a 4-cylinder-in-plane layout that shared many components with this set of Santa Fes. It's not clear who borrowed from whom, but the Mike's boiler had 62 more small tubes than did these SFs, which were delivered in much greater quantity.

Class 900/1600 - superheated (Locobase 8256)

Data from AT&SF 7 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (also visited 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema.

Locobase 463 shows the original tandem-compound design in which the high-pressure and low-pressure cylinders were lined up one behind the other (HP leading). 900s were delivered as coal burners, 1600s as oil burners.

In 1916, the railroad started simpling and superheating these two classes to a common design. Apparently they accomplished the simple-expansion makeover simply by removing the HP cylinders in front, shortening the piston rod, and bushing the LP cylinders to achieve the 28" diameter. The firebox acquired two arch tubes that contributed 13.95 sq ft to the firebox heating surface. Two were fitted with Baker valve gear; all of the others used Walschaert gear.

The 1600s were heavier, but otherwise the two classes were identical.