Pennsylvania Railroad 3750

39°58′56″N 79°9′40″W / 39.98222°N 79.16111°W / 39.98222; -79.16111

Pennsylvania Railroad 3750
PRR No. 3750 on display at the Railroad Museum of Pennsylvania in July 1984
Type and origin Power type Steam Designer J.T. Wallis, Alfred W. Gibbs, and Axel Vogt Builder Altoona Works Serial number 3703 Build date April 1920
Specifications Configuration: ​  • Whyte 4-6-2 Gauge 4 ft 8+1⁄2 in (1,435 mm) Leading dia. 36 in (914 mm) Driver dia. 80 in (2,032 mm) Trailing dia. 50 in (1,270 mm) Wheelbase 13 ft 10 in (4.2 m) between driving axles Length 83 ft 6 in (25.5 m) Loco weight 274,500 lb (124,511 kg) Fuel type Coal Firebox: ​  • Grate area 70 sq ft (7 m2) Boiler pressure 205 psi (1,413 kPa) Cylinder size 27 in × 28 in (686 mm × 711 mm)
Performance figures Tractive effort 44,460 lbf (197,767.9 N) Factor of adh. 4.54
Career Operators Pennsylvania Railroad Class K4 Numbers PRR 3750 Retired 1956 Current owner Pennsylvania Historical and Museum Commission Disposition On static display U.S. National Register of Historic Places Official name Passenger Locomotive No. 1737 Designated December 17, 1979 Part of Pennsylvania Railroad Rolling Stock Thematic Resource Reference no. 79002273[1]

Pennsylvania Railroad 3750 is a 4-6-2 "Pacific" type steam locomotive located at the Railroad Museum of Pennsylvania, just outside Strasburg, Pennsylvania in the United States. For over a decade, the No. 3750 locomotive stood-in for the prototype K4, No. 1737, and was listed on the National Register of Historic Places in 1979. It was one of two surviving K4 locomotives, along with No. 1361, both designated as the official state steam locomotive by the Pennsylvania General Assembly in 1987.