Southern Pacific No. 4423

Southern Pacific No. 4423
Technical specifications
Serial number(s)	7721–7734
Manufacturer(s)	Lima Locomotive Works
Build date	1937
Classification	GS-3
Wheel arrangement	4-8-4
Rail gauge	4 Foot 8 Inches
Cylinders	Two, outside
Boiler pressure	280 psi (1.93 MPa)
Bore stroke	26 in × 32 in (660 mm × 813 mm)
Firegrate area	90.4 sq ft (8.40 m2)
Fuel type	Fuel oil
Heating area	4,890 sq ft (454 m2)
Performance figures
Maximum speed	At least 106 mph (171 km/h)
Continuous power-output	5000hp at 60 mph (97 km/h)
Tractive effort	62,800 lbf (279.35 kN) 76,650 lbf (340.96 kN) with booster
Service information
Operator(s)	Southern Pacific Railroad
Running numbers	4423
Disposition details
Preserved	See Here
Disposition	Scrapped

Southern Pacific No. 4423 was a Southern Pacific class GS-3 4-8-4 "Northern" type steam locomotive that was built by the Lima Locomotive Works for the Southern Pacific Railroad in 1937.

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