PRR 520

PRR 520

Pennsylvania Railroad 520 on display at the Railroad Museum of Pennsylvania.

Type and origin Power type Steam Builder Baldwin Locomotive Works Build date December 1916

Specifications Configuration 2-8-2 Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver dia. 62 in (1,575 mm) Length 82 ft 1⁄4 in (25.0 m) Adhesive weight 232,500 lb (105,500 kg) Loco weight 324,700 lb (147,300 kg) Tender weight 447,300 lb (202,900 kg) Total weight 772,000 lb (350,000 kg) Boiler pressure 205 psi (1,413 kPa) Heating surface:  • Firebox 305 sq ft (28 m2) Superheater: ​  • Heating area 943 sq ft (88 m2)

Performance figures Tractive effort 61,465 lbf (273 kN) Factor of adh. 3.78

Career Operators Pennsylvania Railroad Class L1s Retired October 20, 1957 Current owner Pennsylvania Historical and Museum Commission U.S. National Register of Historic Places Official name Mikado Freight Locomotive No. 520 Designated December 17, 1979 Part of Pennsylvania Railroad Rolling Stock Thematic Resource Reference no. 79002269

Coordinates: 39°58′56″N 76°9′40″W / 39.98222°N 76.16111°W / 39.98222; -76.16111

Pennsylvania Historical and Museum Commission

Pennsylvania Railroad 520 is a 2-8-2 "Mikado" type steam locomotive built in 1916 by the Baldwin Locomotive Works for the Pennsylvania Railroad for freight duties as a member of the L1s class. In 1942, the locomotive was involved in a devastating boiler explosion incident that required construction of a new, replacement boiler. After being retired in 1957, the locomotive was saved for preservation and placed on display at the Railroad Museum of Pennsylvania in Strasburg, Pennsylvania and was listed on the National Register of Historic Places in 1979.

The L1s is a class of 2-8-2 steam locomotives that was developed in 1914 to replace the H9s-class. The L1s used boilers identical to the ones eventually used for Pennsylvania Railroad's famed K4s-class steam locomotives. Most L1s locomotives were moved to other duties when the I1s was introduced in 1924.