Southern Pacific 5021

Specifications
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

Type and origin
Type and origin
Power type	Steam
Builder	American Locomotive Company
Serial number	66793
Build date	1926

Southern Pacific 5021
Southern Pacific 5021
	Southern Pacific 5021 on display at RailGiants in September 2013
Power type
Type and origin
Power type	Steam
Builder	American Locomotive Company
Serial number	66793
Build date	1926
Configuration:;
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
Maximum speed
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
Operators
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.