Class 1400 (Locobase 6547)

The 1920 AT & SF locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive collection shows that the firebox heating surface included 30 sq ft of arch tubes.

This class was the most numerous group of Atlantics on the Santa Fe. Like virtually of the rest, these were 4-cylinder Vauclain compounds. The 1905-1907 engines had these works numbers:

1905

July 26110, 26118, 26120-26121; August 26153, 26180, 26194, 26202

1906

February 27593-27594, 27622-27624; March 27754, 27767, 27797-27798, 27819, 27820, 27837; April 27842-27844, 27918, 27963, 28011

1907

March 30385-30386, 30399, 30423, 30430, 30439, 30462-30466; April 30579, 30598-30599, 30652-30653, 30731-30732, 30743, 30746-30747; May 30784, 30794, 30814-30815. Of these, most of the early engines were never simpled and were scrapped in the late 1920s. Those that were -- 1413, 1415-1417, 1420, 1425, 1428, 1440, 1142, 1444, and 1446-1447 -- were rebuilt as simple-expansion 22"x 26"locomotives in 1926-1929. The renovation extended their service into the late 1930s at the least with at least one being scrapped as late as 1948.

The later locomotives - 1452-1478 -- were delivered in 1909 to essentially the same design. Their works numbers were:33861-33866, 33881-33882, 33899-33906, 33946-33947 in October; 34084-34087 in November; 34106-34109, 34138 in December.

Perhaps because of their slightly later vintage, more of the class was rebuilt as simple-expansion engines with 22" x 26" cylinders. Those engines were 1453, 1456-1458, 1460, 1462, 1466, 1468, 1470, 1472-1473, 1475, 1477-1478.

A further 12 were delivered with 73" drivers; see Locobase 6548. One was superheated; see Locobase 8994.

Class 1453 - superheated (Locobase 8994)

The 1920 AT & SF locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive collection shows that the firebox heating surface included 30 sq ft of arch tubes.

Locobase was suprised to find this lone superheated compound among the large class of saturated Atlantics produced by Baldwin for the Santa Fe (see Locobase . The large-diameter tubes and flues allowed for a nearly identical heating surface to that of the earlier design, but almost 1/5 of that amount was now superheated.

Class 1480/Bull Moosers (Locobase 450)

Data from Baldwin Locomotive, Record of Recent Construction #57 (1911), p. 27. Works numbers were 35353-35364 in October 1911; 35528-35538 in November.

These odd Atlantics (23 in all) had an unusual profile with three domes -- the two steam domes flanked the sand dome. Nicknamed "Bull Moosers," their tapered boilers mounted ahead of a Jacobs-Shupert firebox were long enought that there was room for a third driving axle. Also, the Walschaerts valve gear was spread out along the driving set and had intermediate links. The main rod drove the front axle.

The stayless Jacobs-Shupert firebox is discussed in Locobase 463. Its promise was compromised by its inability to avoid leaking.

Steam from the front dome traveled through an external steam pipe extending forward and down into the inside high-pressure cylinders. Another steam pipe emerged near the smokebox on either side after passing through a smokebox reheater that measured 1,147 sq ft in area; this pipe entered the outside low-pressure cylinders.

Retired in 1926-1953.

In the 1920s, 14 of these engines were converted to simple-expansion operation (22" x 26" cylinders, one steam dome removed, main rod driving the rear axle).

Class 1550 (Locobase 6548)

The 1920 AT & SF locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive collection shows that the firebox heating surface included 30 sq ft of arch tubes. Works numbers were 26009, 26015, 26030, 26049, 26089, 26099, 26104 in July 1905; 27625 in February 1906; and 27664, 27689-27690, 27704 in March.

The larger portion of this class is described in Locobase 6547, but the only significant difference is driver diameter. They were produced as 1450-1462. They renumbered in the 1550 range to accommodate later orders of 79" Atlantics that took the original locomotives and ensured a continuous numbering for that variant.

Only 2 of this class -- 1554, 1556 -- were rebuilt as 2-cylinder, simple-expansion engines with 22"x 26" cylinders. The others were all scrapped in the late 1920s with a few lending their boilers to other members of the class. 1556 was scrapped in August 1940 while 1554 soldiered on and was scrapped only in August 1952.

Class 256 (Locobase 5330)

Data from AERJ July 1903 as corrected by AT&SF 7 -1901 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 . Works numbers were 22339 in June 1903 and 22456, 22511, 22543 in July.

These Atlantics were the first of more than 160 4-4-2s purchased by the Santa Fe. They had the Vauclain compound arrangement and at least one (256) had the riveted Jacobs-Shupert firebox. (See Locobase 463 for a description of this unusual firebox design. )

It's not clear whether they were ever superheated or simpled, but it seems unlikely. By 1920, however, the class operated its valves with Baker gear, which replaced the Walschaert gear originally employed.

With passenger-train weights increasing every year, this inherently limited arrangement enjoyed only short-term success and the class operated only until 1925-1927.

Class 507 (Locobase 4091)

Data from AT&SF 9 - 1920 Loco Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. See also 1906 Baldwin catalogue, which is reproduced on http://www.railroadextra.com/blatsf.hmtl

Works numbers were 24000 in March 1903; 24089, 24091, 24154-24158, 24167 in April; 24180-24182, 24213, 24217, 24220-24221, 24236, 24242, 24247-24248, 24273, 24282, 24287-24288 in May; 24297-24298, 24312, 24349, 24352-24353, 24362, 24367, 24379, 24380, 24389 in June.

The AT&SF bought a couple of batches of Vauclain balanced-compound Atlantics from Baldwin in this year. When delivered, the design's firebox heating surface included 10 sq ft of "firebrick" tubes, which was later enlarged to 30 sq ft of arch tubes. For the later, heavier group of Atlantics built to the same design in the same year, but heavier, see Locobase 8993.

The 1906 Baldwin catalogue shows one of the 35-engine class that also was displayed at the St Louis Exposition of 1904. See also the report of Tests of Locomotives at the Louisiana Purchase Exposition published in Transactions of the American Society of Mechanical Engineers (Volume 27 - 1906), pp. 625-626.

In the late 1920s, the Santa Fe either scrapped the Atlantics it had or converted them to simple-expansion. The latter ran into the 1940s.

Class 542 (Locobase 8993)

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

The AT&SF bought a couple of batches of Vauclain balanced-compound Atlantics from Baldwin in this year. Locobase 4091 tells about the first set. This latter group of 18 (Works #24663-24665, 24673, 24678-24679, 24684, 24694-24695, 24702-24704, 24706, 24712-24714, 24725, 24757) came in September 1904 and had a firebox heating surface that included 20 sq ft of arch tubes. Other than that and an increase in weights, the two classes were essentially identical.

Works #24663-24665, 24673, 24678-24679, 24684, 24694-24695, 24702-24704, 24706, 24712-24714, 24725, 24757.

In the late 1920s, the Santa Fe either scrapped the Atlantics it had or converted them to simple-expansion. The latter ran into the 1940s.