San Pedro, Los Angeles & Salt Lake / St.Joseph & Grand Island / Oregon-Washington RR & Navigation / Union Pacific / Pacific & Idaho Northern / Oregon Short Line 4-6-0 "Ten-Wheeler" Type Locomotives

Class 1220 (Locobase 7442)

Data from 1918 Union Pacific Locomotives & Tenders diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

These went into service on the UP after they were produced in Philadelphia (works #30607, 30626-30632, 30674-30675, 33754-33757, 33770-33773, 33786-33787, 36403-36406, 36456-36461). A few were superheated in a modification that replaced 122 small tubes with 21 5 3/8" flues, but most were converted to 0-6-0s beginning in 1915 and renumbered in the 4369-4400 series.

Class 1242 (Locobase 8341)

Data from UP 11 - 1946 Locomotives & Tenders diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase 7442 describes the original 4-6-0 design that was superheated in the UP shops. The modification replaced 122 small tubes with 21 5 3/8" flues.

Class 1250 (Locobase 7443)

Data from 1918 Union Pacific Locomotives & Tenders diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase doesn't have details on when these went into service on the UP.

Class 1250 - superheated (Locobase 7444)

Data from 1918 Union Pacific Locomotives & Tenders diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

When the UP superheated these medium-size Ten-wheelers, they replaced 163 small tubes with 27 flues. Locobase doesn't know when these locomotives were refitted. The first of the superheated locomotives were retired in 1937.

Class 1320 - simpled & superheated (Locobase 6603)

Data from 1918 Union Pacific Locomotives & Tenders diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

When the 1320 compounds (Locobase 6602) were simpled not too long after they entered service, they took on the same characteristics as the 18 others that had been delivered as simple-expansion locomotives. Compared to the compounds, the simple-expansion design's firebox heating surface as calculated dropped considerably. In the 1920s, the few survivors were superheated with the usual loss of heating surface. The driver diameter was cut by 3" as well. Retirements occurred sporadically over a 15-year period from 1921 to 1936.

Class 1360 (Locobase 6604)

Data from 1897 Union Pacific Locomotives & Tenders Folio 200 supplied in May 2005 by Allen Stanley from his extensive collection.

This batch of Vauclain compounds differed from the 1830s (Locobase 659) in the layout of the firebox. The heating surface is considerably smaller as calculated, but the grate area grew substantially. Conversion to simple expansion meant only replacement of the Vauclain package with two 20" x 24" cylinders. This resulted in a tractive effort of 30,220 lb. This class began retirements a little later than the other UP Ten-wheelers -- 1927 -- but had all left the road by 1934.

Class 1360 - simpled and superheated (Locobase 7434)

Data from 1918 Union Pacific Locomotives & Tenders Folio 200 supplied in May 2005 by Allen Stanley from his extensive collection.

Although the Union Pacific did not operate a lot of Ten-wheelers, at least some of them were deemed worthy of updating. Some of the 1360 compounds (profiled in Locobase 6604) first were simpled along the same lines as other UP compounds. Later, the railroad removed half of the small tubes from the original boiler and replaced them with 26 flues. At least a couple of this class operated into the 1930s with these boilers.

Class 1400 (Locobase 6593)

Data from 1897 Union Pacific Locomotives & Tenders Folio 200 supplied in May 2005 by Allen Stanley from his extensive collection.

Class 1405 (Locobase 6594)

Data from 1897 Union Pacific Locomotives & Tenders Folio 200 supplied in May 2005 by Allen Stanley from his extensive collection.

These were identical to the 1400s shown in Locobase 6593 except for the much smaller drivers.

Class 1584 (Locobase 8343)

Data from UP 11 - 1946 Locomotives & Tenders diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

This trio of Ten-wheelers operated in Idaho on the UP's P & IN subsidiary after their delivery in 1907 (102) and 1910 (104-105). Another, built later and to a slightly different design, is described on Locobase 8344.

They were eventually integrated into the parent railroad's numbering system. Small and lightweight, the class operated until 1946-1947.

Class 1585 (Locobase 8344)

Data from UP 11 - 1946 Locomotives & Tenders diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Several years after the delivery of three Ten-wheelers (Locobase 8343) of moderate size, Baldwin sent along this single, smaller locomotive. It seems to have been sized for its railroad and had a small pair of cylinders as well as a modest-sized boiler and grate.

Class 1701 (Locobase 6598)

Data from 1897 Union Pacific Locomotives & Tenders Folio 200 supplied in May 2005 by Allen Stanley from his extensive collection. According to http://utahrails.net/up/steam/up-steam-1885-1915.php

(visited 14 July 2005), this pair was delivered in 1868 as part of an order from the Taunton works. The class originally had numbers 93-99. In 1892, 95-96 were rebuilt as 1700-1701, 99 was rebuilt as a 4-4-0 in 1894.

Class 1703 (Locobase 6599)

Data from 1897 Union Pacific Locomotives & Tenders Folio 200 supplied in May 2005 by Allen Stanley from his extensive collection.

Additional information from 1899 Brooks catalogue. Tapered boiler, firebox heating surface included 20 sq ft of arch pipes. The profile showed widely flared spark-arresting stack, steel clerestory cab, inside valve motion, small drivers. Many of these were superheated later, which see.

Class 1800 - 62"" (Locobase 6600)

Data from 1897 Union Pacific Locomotives & Tenders Folio 200 supplied in May 2005 by Allen Stanley from his extensive collection.

Boiler pressure is estimated. This design was an enlargement of the 1400s and shared the same firebox. When they were renumbered in the 1300s, the heating surface had dropped slightly as 4 tubes were removed and 30 sq ft of firebox heating surface was subtracted. The new totals were 163.3 sq ft direct heating surface and 1,900.6 sq ft total evaporative heating surface.

Class 1800 - 69"" (Locobase 6601)

Data from 1897 Union Pacific Locomotives & Tenders Folio 200 supplied in May 2005 by Allen Stanley from his extensive collection.

Boiler pressure from the 1918 diagram book. This design was an enlargement of the 1400s and shared the same firebox. When they were renumbered in the 1300s, the heating surface had dropped slightly as 4 tubes were removed and 30 sq ft of firebox heating surface was subtracted. The new totals were 163 sq ft direct heating surface and 1,900.6 sq ft total evaporative heating surface.

Class 1820 / 1320 (Locobase 6602)

Data from 1897 Union Pacific Folio 200 and UP 5 - 1918 Locomotives & Tenders supplied in May 2005 by Allen Stanley from his extensive collection and August Sinclair, Baldwin works #18326-18331, 18361-18362, 18382-18385, 18425-18426, 18429, 18434, 18481-18482, 18484-18485, 18898-18901, 18929-18932, 18979-18984, 19039-19040, 19111-19112, 19136-19137.

Part of a slew of Vauclain compounds delivered to the UP at the turn of the 20th Century.

Connelly's Baldwin list indicates that the first 6 engines had a 30" stroke; none of the other sources show a 30" variant.

These were converted to simple-expansion engines -- see Locobase 9673 -- and later superheated; see Locobase 6603.

Class 1820/1320 simpled (Locobase 9673)

Data from UP 5 - 1918 Locomotives & Tenders supplied in May 2005 by Allen Stanley from his extensive collection

These 10 locomotives were part of a slew of Vauclain compounds delivered to the UP at the turn of the 20th Century. They differed from the later engines in their class in having 69" drivers.

Not too long after their arrival on the UP, the railroad followed the pattern adopted by many other railroads and converted their compounds to simple-expansion engines as shown in the specifications. These were later superheated; see Locobase 6603.

Class 1830/1330 simpled (Locobase 9674)

Data from UP 5 - 1918 Locomotives & Tenders supplied in May 2005 by Allen Stanley from his extensive collection

Delivered as part of a large contingent of Vauclain compounds, these engines had 72" drivers (73" when fitted with 3 1/2" tires). Not too long after their arrival on the UP, the railroad followed the pattern adopted by many other railroads and converted their compounds to simple-expansion engines as shown in the specifications. These were later superheated; see Locobase 6603.

Class 30 (Locobase 6578)

Data from 1914 ST J & GI locomotive diagram supplied in May 2005 by Allen Stanley from his extensive collection.

Rogers works #5350 was noted in this diagram book on this page 7; three more had already been retired or sold by 1914. 3 more Tenwheelers were delivered with cylinders 1" smaller in diameter. See Locobase 6577

Like the other St J & GI locomotives shown, this was a relatively lightweight and small example of its arrangement.

Class 33 (Locobase 6577)

Data from 1914 ST J & GI locomotive diagram supplied in May 2005 by Allen Stanley from his extensive collection.

Rogers works #5244, 5246, 5349 were noted in this diagram book on this page -- it turns out that 4 more Tenwheelers were delivered with cylinders 1 inch greater in diameter. See Locobase 6578.

Like the other St J & GI locomotives shown, this was a relatively lightweight and small example of its arrangement.

Class 900 (Locobase 6587)

Data from 1897 Union Pacific Locomotives & Tenders Folio 200 supplied in May 2005 by Allen Stanley from his extensive collection.

This class is a Ten-wheeler extension of the 842-class 4-4-0 design shown in Locobase 6587. The boiler seems to have had a 5 1/2-ft section inserted ahead of the front sheet of the firebox, although very little of the new length consisted of tubes. The first batch came from Rhode Island Locomotive Works (builder's numbers 54-55, 61-66 in 1868) as 900-907 while Baldwin (then trading under M. Baird & Company) supplied road numbers 909-918 (builder's numbers 1707-1708, 1710, 1715-1716, 1764-1765, 1768, 1770, 1774).

Class 919 (Locobase 7441)

Data from 1918 Union Pacific Locomotives & Tenders diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Taunton's big contract with the UP seems to have covered these 85 Ten-wheelers. The first began delivery before the Golden Spike ceremony at Promontory and Taunton added to the class for 12 years. Most of the class was retired before the 1915 renumbering, but 16 lasted in service until the mid-1920s.

Class DL 67 / T-68 (Locobase 7262)

Data from SPLA&SL Locomotive Diagram book (the Salt Lake Route) supplied in May 2005 by Allen Stanley from his extensive collection.

Brooks and Schenectady delivered Ten-wheelers to the LASL. From the evidence Locobase finds in Drury (1993), 2 came from Brooks, 4 more from Schenectady. As Drury notes, the parent Union Pacific wasn't big on 4-6-0s and these apparently were retired in 1925 with little or no updating beforehand.

Class T (Locobase 2973)

Data from 1899 Brooks catalogue. Tapered boiler, firebox with 20 sq ft of arch pipes, widely flared spark-arresting stack, steel clerestory cab, inside valve motion, small drivers.