Southern Pacific 5021

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Southern Pacific 5021
Southern Pacific 5021 as it appeared in February 1972
Type and origin Power type Steam Builder American Locomotive Company Serial number 66793 Build date 1926
Specifications Configuration: ​  • Whyte 4-10-2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 63+1⁄2 in (1,613 mm) Adhesive weight 317,500 lb (144,000 kg) Tender cap. 16,152 US gal (61,140 L; 13,449 imp gal) water 4,912 US gal (18,590 L; 4,090 imp gal) fuel oil Boiler pressure 225 psi (1,550 kPa) Cylinders 3 Cylinder size (inside) 25 in × 28 in (635 mm × 711 mm) dia × stroke (outside) 25 in × 32 in (635 mm × 813 mm) dia × stroke
Performance figures Maximum speed 70 mph (113 km/h) (Passenger Service) Tractive effort 84,200 lbf (375,000 N) 96,540 lbf (429,400 N) with booster
Career Operators Southern Pacific Railroad Class SP-2 Number in class 49 Numbers SP 5021 Retired 1955 (revenue service) 1963 (excursion service) Restored 1961 Current owner Railway and Locomotive Historical Society Disposition On static display at the RailGiants Train Museum in Pomona, California

Southern Pacific 5021 is an SP-2 class 4-10-2 steam locomotive built in 1926 by ALCO at their Schenectady, New York, shops. It is the only member of this class of SP locomotives to be preserved, and it is one of only five three-cylinder locomotives preserved in North America.