Fort Worth & Denver City 4-6-2 "Pacific" Locomotives in the USA

Class F-3-A - rebuilt Schmidt sh (Locobase 9853)

Data from FW&DC 8 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange.

Locobase 16212 shows the FW&DC 501-505 as they were when delivered with Emerson superheaters in 1910-1911. About a dozen years later, the railroad reorganized the boiler, removing the Emerson 24-tube configuration and deleting 13 tubes to make room for the 32 flues the newer superheater required. It was probably then that the railroad raised the working boiler pressure setting by 40 psi (2.76 bar) .

505 wrecked in December 1928 and scrapped a year later. 502-504 were scrapped in September 1952. 501 was donated to the City of Childress in May 1959.

Class F-3-A-1/F-3-A-2 (Locobase 9854)

Data from C & S 7 -1941 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 67, pp. 37+. (Thanks to Chris Hohl for his 28 March 2016 email noting the original boiler pressure and tender oil capacity.) Alco supplied the first five (works numbers 61070-61072, 61416-61417 in January 1920); Baldwin added two more (55632-55633) that were completed in September 1922 and were identical save for increased weights.

These Pacifics were related to the S-3s (Locobase 1186) originally supplied to the Burlington Road in 1918, but were equipped with two more flues which yielded a bit more superheater area. (The Colorado & Southern bought three more that had 34 flues and smaller 69" drivers; see Locobase 6758.) The fireboxes were identical and derived 59 sq ft (5.5 sq m) of their direct heating surface from a combustion chamber. Like the C & S engines, these had 14" (356 mm) piston valves.

When delivered, the F-3-A tenders carried 3,200 US gallons (12,112 litres) of fuel oil. Their boilers were set at 180 psi (12.4 bar), but soon reset to 200 psi.